Category: ECG

Heart health concerns should not wait — but NHS ECG waiting times can stretch for weeks. A private ECG in Birmingham gives you same-day access to a clear result, reviewed and explained by a doctor at the same appointment.

Whether you have been experiencing palpitations, chest discomfort, or breathlessness, or simply want peace of mind about your heart health, an ECG is one of the quickest and most informative first steps available.

How Much Does a Private ECG Cost in Birmingham?

At The Private GP, a private ECG costs £85. This includes the test itself, performed on-site at our Birmingham clinic, with results reviewed by a GP and discussed with you the same day.

No referral is required. You can book directly, and there is no waiting list. Our ECG heart health check-up is available at our Sutton Oak Corner and Broadway locations.

What Does an ECG Check?

An ECG records the electrical activity of the heart with every beat. Ten small sticky electrodes are placed on the chest, arms, and legs, and the signals they detect are printed as a trace — a wave pattern that a doctor reads to assess how the heart is functioning.

The NHS confirms that an ECG can be used to investigate symptoms such as chest pain, palpitations, dizziness, and shortness of breath, and to help diagnose a number of heart conditions.

The British Heart Foundation explains that an ECG can detect problems including abnormal heart rhythms (arrhythmias), evidence of a previous heart attack, signs of reduced blood flow to the heart (ischaemia), and electrical conduction abnormalities. It can also pick up atrial fibrillation — an irregular heart rhythm that significantly increases stroke risk and is often undetected until tested.

What an ECG cannot do is detect every heart condition. Some problems only appear during exertion or intermittently, which is why further tests — such as a 24-hour Holter monitor or an exercise ECG — are sometimes recommended alongside or after a resting ECG.

Who Should Consider a Private ECG?

An ECG is worth considering for anyone experiencing symptoms that could be cardiac in origin, or anyone who wants a baseline assessment of their heart health.

Symptoms that warrant prompt ECG assessment include palpitations or a fluttering sensation in the chest, chest tightness or discomfort, unexplained breathlessness, dizziness or lightheadedness, and persistent unexplained fatigue. These symptoms do not always point to a serious problem, but they deserve proper investigation rather than being left unchecked.

An ECG is also a sensible step for those with a family history of heart disease, those over 40 who have not had a recent heart check, anyone about to start a new exercise programme or high-intensity training, and those required to have cardiac clearance before surgery.

For a broader cardiac and general health assessment in a single appointment, our full health check-up includes an ECG alongside blood pressure, cholesterol, and other key health markers.

Important: If you are experiencing severe chest pain, pain spreading to your arm or jaw, sudden breathlessness, or you suspect you are having a heart attack, call 999 immediately. A private ECG clinic is not an emergency service.

What Happens at the Appointment?

The appointment is quick and entirely painless. The NHS confirms that a standard resting ECG takes around 5 to 10 minutes in total, with the actual recording lasting just 30 to 60 seconds.

You will be asked to remove clothing from the upper body and lie on a couch. Ten small sticky electrodes are attached to your chest, wrists, and ankles. The machine records your heart’s electrical activity while you lie still and breathe normally. The electrodes are then removed and the recording is complete.

At The Private GP, your GP reviews the trace immediately and discusses the findings with you before you leave. You will not be sent away to wait days or weeks for a letter. If anything requires further investigation, your doctor will explain what has been found and what the next step is.

What Happens if the ECG Shows Something Abnormal?

An abnormal ECG result does not automatically mean something is seriously wrong. Many findings require clinical context — your symptoms, age, medical history, and other test results all form part of the picture.

The British Heart Foundation confirms that an abnormal ECG reading does not always mean you have a heart condition. Some variations are benign and require no further action. Others may prompt further investigation.

If your ECG shows something that warrants closer assessment, your GP at The Private GP will explain the finding clearly and advise on appropriate next steps. This may include private blood tests to check cardiac markers, a 24-hour Holter monitor to capture intermittent rhythm changes, or a referral to a consultant cardiologist if specialist input is needed. You will leave the appointment knowing exactly what the result means and what, if anything, needs to happen next.

Frequently Asked Questions

Does a private ECG include a doctor’s review?

Yes. At The Private GP, your ECG trace is reviewed by a GP on the same day and the findings are discussed with you before you leave the appointment.

How long does a private ECG take?

The full appointment takes around 5 to 10 minutes. The recording itself lasts just 30 to 60 seconds. You can return to your normal activities immediately afterwards.

Do I need a GP referral for a private ECG?

No. You can book directly at The Private GP without a referral. Same-day appointments are available at our Birmingham locations.

Can a private ECG detect a heart attack?

An ECG can show signs of a current or previous heart attack, including changes to the ST segment and Q waves. It is one of the key tests used in cardiac assessment, though it is often used alongside blood tests for a complete picture.

If you have been told you need a 24-hour heart monitor, your first question might be practical rather than medical: what on earth do I wear? It is one of the most commonly searched questions about Holter monitoring — and one that almost nobody answers directly.

The honest answer is reassuring. Wearing a heart monitor for 24 hours does not have to be uncomfortable, inconvenient, or disruptive to your normal routine. With the right preparation and the right choice of clothing, most women find the experience far more manageable than they expected.

This guide answers the bra question clearly, then covers everything else you need to know about clothing and daily life with a 24-hour heart monitor — so you can go into your appointment feeling prepared rather than anxious.

If you are experiencing palpitations, dizziness, or chest discomfort and have not yet had a cardiac assessment, our ECG heart health check-up at The Private GP is a prompt first step — results reviewed on the same day, no waiting list.

What Is a 24-Hour Heart Monitor and Why Might You Need One?

A 24-hour heart monitor — also known as a Holter monitor or ambulatory ECG — is a small, wearable device that records your heart’s electrical activity continuously while you go about your normal daily life. Unlike a standard ECG, which captures just a few seconds of heart activity in a clinic, the monitor runs all day and night, capturing rhythm problems that would never show up in a brief appointment.

The British Heart Foundation explains that it is used as a continuously recording ECG, typically for 24 to 48 hours, to help diagnose the cause of symptoms such as palpitations that are not constant and rarely happen when a patient is sitting in their GP’s surgery.

Gateshead Health NHS confirms that a Holter monitor is arranged for people suspected of having frequent heart arrhythmias — including collapses, palpitations, or dizziness — and is also commonly used for people who have had a recent stroke or mini stroke.

The device itself is roughly the size of a mobile phone and is clipped to a belt or waistband. Wires connect it to three sticky electrode patches placed on your chest. The whole fitting appointment takes around 10 to 15 minutes, and once fitted, you carry on with your day as normal — the monitor records everything automatically.

You do not need to press a button or do anything special. You will be asked to keep a diary of your activities and any symptoms you notice, so your doctor can match what your heart was doing with what you were feeling at the time.

Can You Wear a Bra With a 24-Hour Heart Monitor?

Yes. Multiple NHS trusts are explicit on this point: women may keep their bras on during fitting and throughout the monitoring period.

West Suffolk NHS Hospital’s patient leaflet on 24-hour ECG monitoring states directly that you will be asked to remove your clothing above the waist, and that ladies may leave their bras on. Royal Papworth Hospital NHS Foundation Trust uses the same wording in their patient information.

The key question is not whether you can wear a bra — you can — but which type of bra is most suitable.

The London Heart Clinic advises that during the fitting appointment, women will need to remove a wired bra, but may be able to keep wearing their bra if it is unwired or a sports bra. The concern with underwired bras is that the rigid metal underwire can press directly against the electrode patches on your chest, which may cause discomfort and could potentially affect how well the electrodes adhere to your skin over 24 hours. The underwire does not interfere with the electrical recording in the way that a metal implant might, but its pressure on the adhesive patches is the practical problem.

The good news is that a wireless bra or soft-cup bra works perfectly well, is entirely safe to wear, and will not compromise the recording in any way.

What Type of Bra Is Best to Wear With a Heart Monitor?

Choosing the right bra before your appointment makes the whole 24 hours considerably more comfortable. Here is what works well and what to avoid.

Wireless bras are the most straightforward option. Without underwire, there is nothing rigid to press on the electrode patches. Soft-cup wireless bras in breathable cotton or modal fabrics are ideal — comfortable for extended wear and gentle against the skin around the electrode sites.

Sports bras are another excellent choice. Research into Holter monitor comfort confirms that sports bras are often the most comfortable option because they provide gentle, even support without underwire that might press against electrodes. The snug but flexible fit also helps keep the wires in place and prevents them from pulling on the electrode patches as you move. Make sure your sports bra is not excessively tight, as a very constricting band could press on lower chest electrodes.

Front-fastening bras are worth considering for practical reasons. Getting dressed and undressed over 24 hours without pulling clothing over your head — which risks disturbing the electrodes and wires — is much easier with a front clasp or front zip.

What to avoid:

Underwired bras are best left at home for the day. The rigid underwire sits directly over the area where several of the chest electrodes are placed and can lift or loosen them over time.

Strapless bras are also not ideal, as they tend to shift position more easily and provide less stable support for the monitor wires throughout the day.

Very tight bras with a firm, wide band that sits across the lower chest can put pressure on electrodes positioned below the breast line, so opt for something with a softer, more flexible band if you can.

Breathable, natural fabrics such as cotton are preferable to synthetic materials, which can cause sweating around the electrode sites and reduce adhesion over the course of the day.

What Else Should You Wear During 24-Hour Heart Monitoring?

Your clothing choices for the full 24 hours matter almost as much as your bra. The goal is comfort, practicality, and keeping the electrodes securely in place.

East Suffolk and North Essex NHS Foundation Trust advises that patients should wear loose-fitting clothes that are easily removable from the waist up when attending their fitting appointment. This advice holds throughout the monitoring period.

Tops: Choose loose, soft tops that do not cling tightly to your chest. Button-down shirts, cardigans, or zip-up tops are practical choices because you can open them from the front without pulling anything over your head. A loose-fitting t-shirt works well for around the house. The wires that run from the electrodes to the monitor can be tucked discreetly beneath your clothing, so if you would rather no one notices you are wearing a monitor, layering with a cardigan or loose blouse makes this straightforward.

Bottoms: Comfortable trousers, leggings, or a skirt — whatever you normally wear. The monitor clips to your waistband or sits in a pocket, so waistbands that are not excessively tight make this more comfortable.

Metal: Avoid clothing with metal buttons, buckles, or zips across the chest area. There is no need to remove jewellery such as earrings or a necklace, but avoid wearing anything metallic directly over the chest where the electrodes sit.

Sleeping: You wear the monitor overnight. For bed, a loose pyjama top or nightshirt that fastens at the front works well. The monitor can be placed beside you on the mattress or tucked under your pillow. Your clinician will advise on the best approach at the time of fitting.

The day before: Do not apply lotion, oil, or talcum powder to your chest on the day of your fitting appointment. These reduce how well the electrodes stick to your skin, which can lead to a poor-quality recording or electrodes that come loose during the day.

What Can You Not Do With a 24-Hour Heart Monitor?

The main restriction with a traditional wired Holter monitor is water. You cannot shower, bathe, or swim while the monitor is attached.

University Hospital Southampton’s patient information is clear: the monitor must be kept dry throughout the recording period. Getting the device wet will damage it and could invalidate your recording — meaning you may need to repeat the test. If you are wearing the monitor for longer than 24 hours, your clinician will give you spare electrodes and show you how to remove and reattach the device briefly for washing.

Modern patch-style monitors — a single adhesive unit that sticks directly to the chest without wires — are sometimes waterproof. Your clinician will tell you exactly which type of device you have been given and what it can and cannot tolerate.

Beyond the water restriction, both the NHS and clinical guidance are consistent that you should carry on with your normal daily routine whilst wearing the monitor. This is the entire point of the test. If you restrict your activity, rest more than usual, or avoid the things that normally trigger your symptoms, the recording may not capture what your doctor needs to see.

Walking, light exercise, going to work, cooking, shopping — all of these are fine. If you normally do more vigorous exercise, check with your clinician beforehand, as this may vary depending on your specific situation.

Keep your diary card with you and note down the time of any symptoms — a flutter, a dizzy spell, breathlessness, or chest discomfort. Also jot down your main activities and when you go to bed and wake up. This correlation between symptoms and heart rhythm is what allows your doctor to make a meaningful interpretation of the results.

What Happens After the 24 Hours?

Once the monitoring period is complete, you remove the monitor yourself — your clinician will show you how at the fitting appointment — and return the device and your diary card to the cardiology department. Most NHS trusts have a drop-off point at reception.

The data is then analysed by a cardiac physiologist and the results are sent to the doctor who referred you. On the NHS, this process typically takes several weeks from referral to results, depending on local waiting times.

If you are experiencing symptoms that concern you and want to be assessed promptly before a Holter monitor referral, The Private GP can help. Our ECG heart health check-up gives you an on-site ECG with results reviewed and discussed by a doctor on the same day. If your ECG identifies something that warrants further investigation, we can discuss next steps clearly, including whether ambulatory monitoring or additional tests are appropriate.

Frequently Asked Questions

• Can I wear an underwired bra with a Holter monitor?

It is best to avoid one if you can. The London Heart Clinic advises that wired bras should be removed during fitting. The metal underwire can press on the electrode patches attached to your chest, which may cause discomfort and potentially loosen the adhesive over the course of 24 hours. A wireless bra or sports bra is a much more comfortable and practical choice.

• Will my bra interfere with the heart monitor readings?

A well-chosen wireless or soft-cup bra will not interfere with your heart monitor readings at all. The electrodes on your chest record the electrical signals from your heart, and fabric does not affect this. The main concern with underwired bras is physical pressure on the electrode patches, not electrical interference. Wear something comfortable and the recording will be accurate.

• Can I exercise while wearing a 24-hour heart monitor?

Light to moderate exercise is generally fine and is actually encouraged, as the NHS confirms that carrying on with your normal daily routine is important for an accurate recording. If you normally do vigorous exercise such as running, swimming, or gym training, check with your clinician beforehand. Swimming is not permitted with traditional wired monitors, as the device must be kept dry.

• Can I shower with a 24-hour heart monitor?

No, not with a traditional wired Holter monitor. The device must be kept completely dry throughout the recording period, as water will damage it. If you are wearing the monitor for longer than 24 hours, you will be given spare electrodes and shown how to disconnect briefly for washing. Some modern patch-style monitors are waterproof — your clinician will tell you which type you have been given and what it can tolerate.

• What do I do if an electrode falls off?

Do not panic. Try to press the electrode patch gently back onto your skin as close to its original position as possible. Make sure the skin is dry before reattaching it. Note the time in your diary. If the electrode will not reattach, call the cardiology department for advice — contact details will be on your appointment information. Losing contact on one electrode briefly does not usually ruin the entire recording, but it is worth noting in your diary so your clinician can account for it when reading the results.

Around two million people in the UK are living with angina. Many of them waited months — or longer — before getting a proper diagnosis, because their symptoms were dismissed or their resting ECG came back normal. That delay carries real risk. Angina is a warning sign that the heart is not receiving enough blood, and without treatment, it can increase the risk of a heart attack significantly.

One of the most common questions we hear at The Private GP is: “I had an ECG and it was normal — so why do I still have chest pain?” The answer is that a normal ECG does not mean a normal heart. And understanding what an ECG can and cannot show for angina could make a real difference to how quickly you get the right diagnosis.

If you have chest pain or any symptoms you are concerned about, our ECG heart health check-up is available on site in Birmingham with results reviewed by a doctor on the same day.

What Is Angina and Why Is It Easy to Miss?

Angina is chest pain or discomfort caused by reduced blood flow to the heart muscle. It is not a heart attack, but it is a warning sign that the heart is not getting enough oxygen — usually because one or more coronary arteries are narrowed.

The NHS describes angina as a sudden pain or tightness in the chest, neck, shoulders, jaw, or arms. These symptoms are often brought on by exercise, emotional stress, cold temperatures, or a heavy meal — and they typically ease within a few minutes of resting. This pattern is the hallmark of stable angina, the most common type.

Unstable angina is more dangerous. It occurs without warning, often at rest, and does not follow a predictable pattern. It is a medical emergency, as it can signal an impending heart attack.

Research published in Pavilion Health Today confirms that approximately two million people in the UK have been diagnosed with angina, with around 96,000 new cases identified every year. It is more common in men and in those over 55, though it can affect anyone — particularly those with high blood pressure, high cholesterol, diabetes, a family history of heart disease, or a history of smoking.

Angina is easy to miss for several reasons. The pain often comes and goes. It can feel like heartburn or indigestion. In women especially, symptoms are frequently atypical — presenting as fatigue, breathlessness, or jaw discomfort rather than classic chest pressure. As a result, many people live with undiagnosed angina for months or even years before getting the right assessment.

Can an ECG Detect Angina?

An ECG can provide important clues that suggest angina, but it cannot diagnose it with certainty on its own. Whether an ECG picks up angina depends heavily on when it is done — specifically, whether the heart is under stress at the time of the recording.

A resting ECG taken between episodes may appear entirely normal. Research published in PMC confirms that approximately 50% of patients with angina have completely normal findings on a resting ECG. This is because angina, unlike a heart attack, does not usually cause permanent damage to the heart muscle — so when the heart is at rest and receiving adequate blood, the trace may look unremarkable.

The National Heart, Lung, and Blood Institute confirms that certain ECG patterns can be a sign of unstable angina or vasospastic angina. However, even during an episode, your ECG may sometimes be normal. This does not mean your symptoms are not real or not cardiac in origin — it simply means the ECG alone is not sufficient to rule angina out.

An ECG is most useful for angina in three specific situations. First, when it is recorded during an active episode of chest pain — when changes to the heart’s electrical activity are most likely to show up. Expert Cardiologist London advises that if you have chest pain, it is best to have an ECG performed while the discomfort is still present. Second, when it shows signs of a previous heart attack or ongoing ischaemia that point towards underlying coronary artery disease. Third, as part of a broader clinical picture alongside your symptoms, risk factors, and other tests.

A normal resting ECG does not rule out angina. It is the beginning of an investigation, not the end of one.

What Does Angina Look Like on an ECG?

During an angina episode, the ECG may show characteristic changes that indicate the heart muscle is not receiving sufficient blood. The most significant of these is ST segment depression.

PMC research on the ECG profile of angina patients explains that a depression of 1mm or more in the ST segment — the flat line between the main spike of the heartbeat and the recovery wave — is the most characteristic ECG change associated with myocardial ischaemia. In plain terms, this dip in the trace is the heart’s electrical way of signalling that its blood supply is temporarily compromised.

Other changes that may appear during an angina episode include T wave flattening or inversion, where the recovery wave after each heartbeat looks abnormal in shape or direction. In a rare form of angina called vasospastic (or Prinzmetal) angina — caused by coronary artery spasm rather than narrowing — the ECG may instead show ST segment elevation, which can look similar to a heart attack on the trace.

Between episodes, when the heart is at rest and receiving enough blood, the ECG often returns to normal. This is why a resting ECG performed when a patient is symptom-free can appear completely unremarkable even in someone with significant coronary artery disease. The trace is essentially a snapshot — and if the problem only shows itself under stress, a resting snapshot will not capture it.

The ECG may also show signs of a previous heart attack, such as abnormal Q waves, which can indicate past damage to the heart muscle. In this context, the ECG helps build a picture of the underlying coronary artery disease that typically causes angina.

Is an Exercise ECG Better at Detecting Angina?

An exercise ECG — where the heart is monitored while you walk on a treadmill or cycle on a stationary bike — is better at provoking and capturing the changes associated with angina than a resting test. By making the heart work harder, it recreates the conditions under which angina typically occurs.

Research cited in PMC confirms that the exercise ECG is more sensitive and specific than the resting ECG for detecting myocardial ischaemia, and it is described as the test of choice for identifying inducible ischaemia in patients suspected of having stable angina. During an angina episode triggered by exercise, the ST segment changes discussed above are far more likely to appear and be captured.

However, it is important to understand the current UK clinical guidance on this. NICE — the National Institute for Health and Care Excellence — no longer recommends the exercise ECG as the first-line diagnostic test for suspected stable angina. This change to guidelines came in 2010 and was reinforced in 2016 and 2021, based on evidence that the exercise ECG has limited sensitivity and specificity compared to modern imaging techniques. A review published in PMC found that the exercise ECG has a weighted mean sensitivity of 68% and specificity of 77% when compared to coronary angiography — meaning it misses a meaningful proportion of true cases and occasionally flags false positives.

NICE now recommends CT coronary angiography as the first-line investigation for patients with typical or atypical chest pain where stable angina is suspected. This gives a detailed image of the coronary arteries and can directly show narrowing or blockage.

The British Journal of Cardiology confirms that the exercise ECG still has a role in specific situations — for example, assessing exercise tolerance, evaluating exercise-induced arrhythmias, and monitoring patients with known coronary disease. However, it should not be used as the sole test to confirm or rule out a new diagnosis of stable angina.

What Other Tests Are Used Alongside an ECG for Angina?

Because an ECG alone is rarely sufficient to diagnose angina, it is almost always used as part of a broader assessment. A complete picture typically involves several investigations.

CT coronary angiography is now the NICE-recommended first-line test for suspected stable angina. It uses a type of X-ray scanning with injected dye to show whether the coronary arteries are narrowed or blocked. It is non-invasive and provides detailed anatomical information that an ECG cannot.

Blood tests play an important supporting role. Troponin levels in the blood can help clinicians distinguish between unstable angina and a heart attack — troponin is a protein released when heart muscle is damaged, and it rises in a heart attack but typically remains normal in stable angina. Cholesterol levels, blood glucose, and inflammatory markers also help assess cardiovascular risk. At The Private GP, our private blood tests can be arranged on site, including a BNP blood test which measures a hormone released when the heart is under increased strain.

An echocardiogram uses ultrasound to look at the structure and function of the heart. It can identify areas of poor muscle movement that suggest reduced blood supply, and it gives useful information about heart valve function and chamber size.

A Holter monitor — a wearable device that records the heart’s activity continuously over 24 hours or longer — is occasionally used when silent ischaemia is suspected, or when symptoms occur at irregular and unpredictable times.

When Should You Get an ECG for Chest Pain?

If you are experiencing symptoms that could be angina, you should not wait for them to happen again before getting checked. Act on what you are feeling now.

NICE guidance is clear that an ECG should be taken as soon as possible when a clinician suspects angina. This is because the test is most useful during or shortly after an episode, when changes are most likely to be captured. Waiting weeks for an NHS referral means the window in which that recording would be most informative may have passed.

Symptoms that warrant prompt assessment include chest tightness or discomfort that comes on during exercise, exertion, or stress and eases with rest. Pain that spreads to the jaw, left arm, shoulders, or upper back. Unexplained breathlessness, fatigue, or dizziness. Palpitations occurring alongside any of these symptoms.

If your chest pain does not stop after resting for a few minutes, is getting worse, or is accompanied by sweating, nausea, or severe breathlessness, call 999 immediately. This could be a heart attack or unstable angina, both of which are medical emergencies.

If your symptoms are less acute — coming and going, linked to exertion, easing with rest — then a same-day private assessment is the right step. Our home visit service is also available for patients who are unable to come to the clinic.

A normal ECG does not mean your symptoms can be ignored. It means further investigation is needed. Getting that first ECG done promptly is the step that sets everything else in motion.

Frequently Asked Questions

• Can you have angina with a normal ECG?

Yes, and this is very common. Research confirms that approximately half of all patients with angina have a completely normal resting ECG when they are not experiencing an episode. A normal ECG does not rule out angina. If your symptoms are consistent with angina, further investigation is always warranted regardless of what a resting ECG shows.

• What is the best test to diagnose angina in the UK?

NICE currently recommends CT coronary angiography as the first-line investigation for patients with suspected stable angina. This scan gives a detailed image of the coronary arteries and can directly identify narrowing or blockage. It is typically used alongside an ECG, blood tests, and a full clinical assessment of your symptoms and risk factors.

• Does angina always show on an ECG during an episode?

Not always. Most patients with angina show characteristic ECG changes — particularly ST segment depression — during an episode, but this is not universal. Some patients have a normal or near-normal ECG even while experiencing chest pain. This does not mean the pain is not cardiac in origin. It means the ECG alone is not a reliable way to confirm or exclude angina during any given episode.

• Can angina be confused with a heart attack on an ECG?

Occasionally, yes. Both angina and a heart attack can produce similar changes on an ECG, particularly ST segment changes. The key difference is that in a heart attack, ST elevation is typically more marked and sustained, and troponin — a protein released when heart muscle is damaged — rises significantly in the blood. Blood tests alongside the ECG help clinicians distinguish between the two. If there is any doubt, the patient is treated as a cardiac emergency until a heart attack is ruled out.

• How quickly should I get an ECG if I think I have angina?

As soon as possible. NICE guidance states that an ECG should be taken promptly when angina is suspected. An ECG performed during or shortly after an episode is far more likely to show relevant changes than one taken days or weeks later. At The Private GP, same-day appointments are available and results are discussed with you on the day. Do not wait — acting quickly gives you and your doctor the best chance of capturing the information needed to reach the right diagnosis.

Most people know an ECG involves sticky pads and wires. But very few know what is actually happening in those 30 seconds while the machine is running — or what the clinician is looking at when they study the trace afterwards.

That uncertainty is one of the main reasons people feel anxious before the test. When you do not know what is happening, even a quick, painless procedure can feel daunting. The truth is, an ECG is one of the simplest and most elegant diagnostic tools in medicine. Once you understand what it is doing and why, the anxiety tends to disappear.

At The Private GP in Birmingham, our ECG heart health check-up is performed on site. You get results within minutes, discussed with you by a doctor who explains everything clearly. No jargon, no waiting, no uncertainty.

Here is exactly what happens — from the moment you walk in to the moment you walk out.

What Is an ECG Actually Doing to Your Heart?

An ECG does not do anything to your heart. It simply listens to it. Every time your heart beats, it produces a tiny electrical signal. The ECG machine detects those signals through electrodes on your skin and converts them into a visual trace that a clinician can read.

The American Heart Association explains that with each heartbeat, an electrical wave travels through the heart. This wave causes the muscle to squeeze and pump blood around the body. A normal heartbeat on an ECG shows the rate and rhythm of contractions in the upper and lower chambers of the heart.

Here is what that means in practice. Your heart has its own natural pacemaker, called the sinoatrial (SA) node, located in the upper right chamber. Every beat begins as a tiny electrical impulse fired from this node. That impulse travels through the upper chambers of the heart, causing them to contract and push blood downwards into the lower chambers. It then passes through a relay point called the atrioventricular (AV) node before spreading through the lower chambers, causing them to contract and push blood out to the lungs and body.

This entire electrical journey happens in under a second, with every single beat.

InformedHealth.org, published by NCBI, confirms that these electrical signals spread not just through the heart but throughout the body — all the way to the surface of the skin. That is how the electrodes on your wrists, ankles, and chest can pick them up without needing to go anywhere near the heart itself.

The ECG machine measures the changes in voltage on different areas of skin and plots them as a graph. That graph — with its distinctive peaks and dips — is your ECG trace.

What Happens Step by Step During an ECG?

A standard resting ECG follows a clear and predictable sequence. The whole thing, from entering the room to leaving again, takes around 5 to 10 minutes. The recording itself lasts less than a minute.

Here is exactly what you can expect.

You are taken to a private room

The clinician introduces themselves and briefly explains what the test involves. The NHS confirms you can request a chaperone — an additional member of staff to be present — at any point. Just ask if it has not been offered and you would like one.

You remove your upper clothing

You will be offered a gown or drape so that your chest is accessible while the rest of you remains covered. Dignity and privacy are maintained throughout.

Your skin is prepared

The clinician cleans the electrode sites on your chest, wrists, and ankles with a mild alcohol wipe. This removes any oils or lotions that could interfere with the signal. If you have significant chest hair, a small area may need to be shaved to ensure good contact.

Ten electrodes are attached

The British Heart Foundation describes these as ten small sticky patches placed on your chest, arms, and legs. Six go across your chest in specific positions, and one goes on each wrist and ankle. Each electrode is connected by a wire to the ECG machine.

You lie still for the recording

The clinician presses a button to start the recording. You breathe normally and stay as still as possible. Moving, talking, or shivering can introduce interference into the trace. The recording itself is over in 30 to 60 seconds. You feel nothing at all during this time.

The electrodes are removed

Once the trace is complete, the wires are unclipped and the sticky patches are peeled away gently — similar to removing a plaster. The clinician will warn you before doing this.

You get dressed, and the results are reviewed

At The Private GP, your doctor reviews the trace immediately and discusses the findings with you during the same appointment. If you use our home visit service, the same process takes place in your own home.

What Are Those Squiggly Lines on the ECG Printout?

Each wave on the ECG trace represents a different part of a single heartbeat. The printout is, in effect, a story of your heart told beat by beat — and every peak and dip has a specific meaning that a trained clinician can read.

Research published via NCBI explains that the basic pattern of electrical activity across the heart was first identified over a hundred years ago. It comprises three main wave components: the P wave, the QRS complex, and the T wave. Together, they appear as a repeating pattern across the length of the trace — once for every heartbeat.

Here is what each part means in plain English.

The P wave is a small, rounded bump at the start of each cycle. It represents the electrical signal spreading across the upper chambers of the heart (the atria), causing them to contract and push blood downwards. If P waves are absent or irregular, it can suggest the heart is not generating rhythm from its usual starting point.

The QRS complex is the tall, sharp spike in the middle — the biggest and most recognisable feature of the trace. This represents the electrical signal spreading through the lower chambers (the ventricles), causing them to contract and push blood out to the rest of the body. It is the part of the trace most closely associated with each actual heartbeat.

The T wave is a broader, gentler wave that follows. It represents the ventricles resetting — what clinicians call repolarisation — ready to fire again on the next beat. Changes to the T wave’s shape, direction, or size can signal a range of conditions, from reduced blood flow to electrolyte imbalances.

A normal ECG trace shows these three components repeating in a steady, consistent pattern. The height of the waves, the spacing between them, and the shape of each peak all carry information. A clinician reading an ECG is essentially measuring the timing and pattern of your heart’s electrical circuit — beat by beat.

What Is the Clinician Actually Looking For?

When a doctor reviews your ECG trace, they are assessing several things simultaneously. Johns Hopkins Medicine confirms that an ECG records how fast the heart is beating, the rhythm of the heartbeats, and the timing of the electrical impulses as they move through the different parts of the heart.

In practice, the clinician is checking for:

Heart rate. A normal resting heart rate for adults is between 60 and 100 beats per minute. An ECG can identify both an unusually fast heart rate (tachycardia) and an unusually slow one (bradycardia) with precision.

Heart rhythm. The spacing between each QRS complex tells the clinician whether the heart is beating in a steady, regular pattern. Irregular spacing can indicate arrhythmias — abnormal heart rhythms — such as atrial fibrillation, which causes the upper chambers to quiver rather than contract properly.

Signs of a heart attack. Changes in the ST segment — the flat line between the QRS complex and the T wave — can indicate that part of the heart muscle is not receiving enough blood. An elevation of this segment is one of the key markers of a heart attack occurring right now. Changes in the pattern of Q waves can suggest a previous heart attack.

Ischaemia. This is the medical term for reduced blood flow to the heart muscle. It can show up as ST segment depression or changes to the T wave shape, suggesting that the heart’s blood supply is compromised even without a full heart attack.

Structural issues. Larger-than-expected wave amplitudes can suggest that certain chambers of the heart are enlarged or that the heart is working harder than it should be — sometimes a sign of high blood pressure, valve disease, or other conditions.

The British Heart Foundation is clear that an abnormal ECG reading does not always mean something is seriously wrong. Many findings require context — your symptoms, medical history, age, and other test results all form part of the picture. A single abnormal reading is the beginning of an investigation, not a definitive diagnosis.

Does an ECG Hurt, and Is It Safe?

An ECG is completely painless and carries no risk whatsoever. This is one of the most important things to understand before you have the test.

MedlinePlus, published by the US National Library of Medicine, is unambiguous: the machine does not send any electricity into your body. It only records electrical signals that your heart is already producing. There is no risk of electric shock, no radiation, and no invasive element of any kind.

The only sensation most people notice is when the sticky electrodes are peeled away at the end of the test. This is briefly uncomfortable — similar to removing a sticking plaster — particularly if you have chest hair. Occasionally, a mild rash or slight skin irritation may appear where the electrodes were placed, but this fades quickly.

Common concerns we hear from patients before their first ECG include:

“Will it hurt?” No. You feel nothing during the recording itself.

“Will I get an electric shock?” No. The machine only listens. Nothing is sent into your body.

“Will it affect my heart?” No. The ECG has no effect whatsoever on your heart’s function.

What Happens After the ECG Recording Is Complete?

Once the trace is printed, it is reviewed by a doctor. What happens next depends on where you have had the test.

At The Private GP, your results are reviewed on the same day — usually within minutes of the recording being taken. Your doctor goes through the trace with you, explains what it shows, and discusses any findings in plain language. You leave knowing exactly where your heart health stands.

If your ECG is normal, you will be given reassurance and, where relevant, advice about heart health monitoring going forward. We may discuss how frequently you should have a check, particularly if you have risk factors such as high blood pressure, high cholesterol, a family history of heart disease, or a history of smoking.

If something in the trace warrants closer investigation, this is not a reason to panic. Your doctor will explain what has been found, what it might mean, and what the next step is. This might include:

Private blood tests to check cardiac markers — for example, a BNP blood test, which measures a hormone released when the heart is under strain. This gives your doctor additional information about how hard the heart is working.

A repeat or extended ECG — either a second resting ECG or a 24-hour Holter monitor, which records your heart’s activity continuously while you go about your normal day.

A referral to a consultant cardiologist if specialist input is needed. We have strong referral networks and can arrange this promptly.

An ECG is often one part of a broader picture. Our full health check-up combines an ECG with blood pressure assessment, cholesterol testing, and other key health markers — giving you the most complete view of your cardiovascular health in a single appointment.

Frequently Asked Questions

• Will I feel anything during the ECG?

No. The recording is entirely painless. The only sensation most people notice is a mild tugging feeling when the sticky electrodes are removed at the end, similar to peeling off a plaster. Nothing is sent into your body during the test — the machine only listens to your heart’s existing electrical signals.

• Can I have an ECG if I have a pacemaker?

Yes. An ECG is safe to have with a pacemaker in place. Let your clinician know before the test begins, as the pacemaker’s signals will appear on the trace and need to be taken into account during interpretation. This is a routine consideration for trained clinicians and does not complicate the test significantly.

• What does it mean if the ECG trace is abnormal?

The British Heart Foundation is clear that an abnormal ECG does not automatically mean something is seriously wrong. Many findings are minor variations or require further context before a conclusion can be drawn. Your doctor will explain what has been found, what it might indicate, and what the appropriate next step is — whether that is a repeat test, blood tests, or a referral.

• Why do I need 10 electrodes if it is called a 12-lead ECG?

This is one of the most common questions we hear. InformedHealth.org explains that the standard 12-lead ECG uses 10 electrodes, but each electrode can be combined with others to create 12 different perspectives — or “leads” — of the heart’s electrical activity. Think of it as 12 different camera angles of the same event, captured using just 10 cameras.

• Can I eat and drink before an ECG?

Yes. The NHS confirms there is no need to fast before a standard resting ECG. You can eat and drink as normal and continue taking your usual medications. The one exception is if you are booked for an exercise ECG — in that case, your clinician will advise you to avoid a heavy meal and caffeine for a couple of hours beforehand.

Most people put off heart tests because they assume it will eat up half their day. An ECG is one of the quickest, most useful tests in medicine — and knowing exactly how long it takes removes one of the most common reasons people delay getting checked.

Whether you have been referred by your GP, you are experiencing palpitations or chest discomfort, or you simply want peace of mind about your heart health, this guide covers everything you need to know. We’ll walk you through the time involved in every type of ECG, what affects the duration, and how quickly you can expect your results.

At The Private GP in Birmingham, our ECG heart health check-up is performed on site. You do not need to travel to a hospital, wait for a referral, or chase results. Most patients are in and out within minutes.

How Long Does a Resting ECG Take?

A standard resting ECG takes between 5 and 10 minutes from the moment you walk into the room to the moment you leave. The recording itself lasts just 30 to 60 seconds.

Cancer Research UK confirms that the test takes around 5 minutes in total, though it can take a little longer to ensure the electrodes and wires are in the correct positions. The British Heart Foundation describes it simply as taking a few minutes and being completely painless.

Here is how that time breaks down in practice:

Skin preparation (1–2 minutes)

The clinician cleans the skin on your chest, wrists, and ankles with a mild alcohol wipe. This helps the electrodes stick properly and ensures a clear signal. If you have chest hair, a small area may need to be shaved.

Electrode placement (2–3 minutes)

Ten small sticky patches are attached to specific points on your chest, arms, and legs. Getting the positions right is important, so this step is done carefully and methodically.

The recording (30–60 seconds)

You lie still and breathe normally while the ECG machine captures your heart’s electrical activity. That is all there is to it. You do not feel anything.

Electrode removal (1 minute)

The patches are peeled away gently, similar to removing a plaster. There is no electricity involved at any point.

Once the recording is complete, the NHS confirms you can return to your normal daily activities and go straight back to work if needed. There is no recovery time.

What Can Make an ECG Take Longer?

Most resting ECGs are completed well within 10 minutes. However, a small number of factors can extend your appointment slightly.

The most common reason is skin preparation. If you have applied body lotion, cream, or oil before your appointment, the electrodes may not stick as well. The clinician will need to clean the skin more thoroughly, which adds a few extra minutes. This is easy to avoid by keeping your chest bare of products on the day.

Movement during the recording is another factor. The ECG machine is sensitive to movement, including fidgeting, shivering, or even talking. If the trace is unclear or noisy, the clinician may need to repeat the recording. Lying still for the short recording period makes a real difference.

In some cases, patients may also need a brief consultation before or after the test to discuss symptoms and results. At The Private GP, this is built into your appointment rather than being a separate booking, which keeps things efficient.

If you have requested a chaperone — a second member of staff to be present in the room during the test — this may add a couple of minutes while one is arranged. It is always your right to ask for one.

How Long Does an Exercise ECG Take?

An exercise ECG, also called a stress test or exercise tolerance test, takes around 30 to 45 minutes in total, including preparation and a recovery period after the exercise phase.

The British Heart Foundation explains that the test itself usually takes around 15 minutes. You walk on a treadmill or cycle on a stationary bike while connected to an ECG machine. The speed and intensity increase gradually every few minutes, and your heart rate, blood pressure, and ECG trace are monitored continuously throughout.

The test is stopped when you reach a target heart rate, or earlier if you develop symptoms such as chest pain or shortness of breath. Guy’s and St Thomas’ Specialist Care notes that the exercise phase itself typically lasts 6 to 10 minutes, with the rest of the appointment time taken up by preparation beforehand and a monitoring period afterwards while your heart rate returns to normal.

An exercise ECG is usually recommended when a resting ECG has not picked up any problems but symptoms persist during physical activity. It gives your doctor a picture of how your heart performs under pressure, rather than at rest.

How Long Does a 24-Hour Holter Monitor Take?

A Holter monitor — also known as an ambulatory ECG — records your heart’s electrical activity continuously while you go about your normal daily life. The appointment to have it fitted takes around 10 to 15 minutes.

University Hospitals Sussex NHS Foundation Trust describes the Holter monitor as a portable device worn for 24 hours, 48 hours, or up to 7 days, depending on what your doctor has requested. Three electrodes are attached to your chest and connected to a small recording device, usually clipped to your waistband or carried in a pocket.

You wear it throughout the day and night, continuing with your normal routine. The one exception is bathing or showering — you cannot submerge the device in water, though some monitors can be briefly disconnected to allow a wash.

The Royal Brompton Hospital advises that fitting takes around 20 minutes including a discussion with the cardiac physiologist. You will be given a diary card to note down any symptoms you experience and the times they occur. Once the monitoring period is complete, you return the device to the clinic and the data is reviewed by a specialist.

A Holter monitor is typically recommended when a resting ECG has not captured the cause of symptoms such as palpitations, dizziness, or blackouts — because these symptoms may not occur during a brief clinic appointment.

How Quickly Will You Get Your ECG Results?

The speed at which you receive your results depends largely on where you have the test done.

At a private clinic like The Private GP, results are reviewed on the same day — often within minutes of the recording being taken. You do not need to wait days for a report to be sent somewhere or chase a follow-up appointment. Your doctor reviews the trace with you directly, explains what it shows, and discusses next steps during the same visit.

On the NHS, the national guidance confirms that you may get results on the same day, but it can take a few weeks depending on the type of ECG and the workload of the reporting team. Cancer Research UK notes results may arrive within 1 to 2 weeks for a standard test — longer for ambulatory recordings. For many patients, that waiting period is one of the most stressful parts of the process.

If your results require further investigation, we can arrange appropriate follow-up promptly. This might include private blood tests to check cardiac markers, a BNP blood test to look at how hard the heart is working, or a referral to a consultant cardiologist. We explain everything clearly so you leave knowing exactly where you stand.

When Should You Book an ECG?

You do not need to wait until something is seriously wrong to have an ECG. In fact, the whole point of the test is to catch problems early, before they become bigger issues.

There are several situations where booking an ECG makes sense. Symptoms such as heart palpitations, chest tightness or discomfort, unexplained breathlessness, dizziness, or persistent fatigue are all good reasons to get your heart checked. Women in particular are often told their symptoms are stress-related or a sign of anxiety, when in fact they warrant a proper cardiac assessment.

You might also consider an ECG if you have a family history of heart disease, are over 40 and have not had a recent heart check, are starting an intensive exercise programme, or are about to undergo surgery. Our full health check-up includes an ECG alongside blood pressure, cholesterol, and other key health markers, giving you a complete picture in a single appointment.

For patients who find it difficult to visit the clinic — whether due to mobility, illness, or a busy schedule — our home visit service brings the care directly to you.

Frequently Asked Questions

• Can I go back to work straight after an ECG?

Yes, absolutely. A resting ECG requires no recovery time at all. The NHS confirms you can return to your normal activities immediately after the test. You can drive, go back to the office, or carry on with your day without any restrictions.

• Do I need to book time off for an ECG appointment?

For a standard resting ECG, you will not need to take time off work. The full appointment, including preparation and results discussion, takes around 10 to 15 minutes at The Private GP. An exercise ECG takes around 30 to 45 minutes in total, so a short window during your day is all that is needed.

• How long does a private ECG take compared to an NHS one?

The test itself takes the same amount of time regardless of where it is performed. The key difference is results turnaround. At a private clinic, you can have results reviewed and discussed within minutes of the recording. On the NHS, results can take days or weeks depending on the type of ECG and local capacity.

• Does an ECG take longer for women?

Not significantly. The process is the same for everyone. Electrode placement on the chest may take a minute or two longer for some women to ensure the electrodes are correctly positioned around breast tissue, but this is a small difference and will not materially extend your appointment time.

• How long does it take to get ECG results at The Private GP?

At The Private GP, we perform ECGs on site and results are available within minutes. Your doctor will review the trace and discuss the findings with you during the same appointment, so you leave with a clear understanding of your heart health and any recommended next steps.

Heart disease is the leading cause of death in women in the UK. Yet research part-funded by the British Heart Foundation found that women are 50% more likely than men to receive the wrong initial diagnosis following a heart attack. A University of Leeds study found that women with the more serious type of heart attack (STEMI) had a 59% greater chance of being misdiagnosed compared with men.

One of the biggest reasons for this is that tests simply aren’t being done quickly enough, or at all. An ECG — a quick heart tracing that takes just minutes — is one of the most important first steps in assessing heart health. Yet many women still feel anxious or unsure about what the test actually involves, particularly because it requires placing electrodes on the chest.

What Is an ECG and Why Is It So Important for Women?

An ECG (electrocardiogram) is a non-invasive test that records the electrical signals your heart produces each time it beats. Small sticky sensors called electrodes are placed on your skin, connected by wires to a recording machine. The machine prints out a trace showing your heart’s rate, rhythm, and electrical activity. A doctor then reviews that trace for any abnormalities.

According to NHS Inform, an ECG can help investigate symptoms of a possible heart problem, such as chest pain, palpitations, breathlessness, and dizziness. It is also used to monitor people already diagnosed with a heart condition.

For women, getting an ECG matters more than many realise. Research published in the European Cardiology Review journal found that approximately 2.8 million women in the UK have been diagnosed with cardiovascular disease, yet CVD in women remains under-diagnosed and undertreated. Part of the problem is that women’s symptoms are often different to men’s. Rather than the classic crushing chest pain, women are more likely to experience fatigue, jaw pain, nausea, or upper back discomfort — symptoms that are frequently dismissed as anxiety or a stomach bug.

An ECG is one of the fastest and most accessible ways to get a clear picture of your heart. If something is picked up early, the outcomes are significantly better.

How Is an ECG Performed on a Woman? A Step-by-Step Guide

An ECG on a woman follows the same process as for a man, with one important consideration around electrode placement on the chest. The test is entirely painless, takes between 5 and 10 minutes in total, and requires no special preparation.

Here is what happens from start to finish.

Step 1: Brief review before you begin

The clinician will ask about your current symptoms, any medications you are taking, and whether you are pregnant or have had any breast surgery or implants. This helps ensure the most accurate reading.

Step 2: You will be asked to remove your upper clothing

You will be offered a gown or drape so that only the areas needed for electrode placement are exposed. Your privacy is maintained throughout.

Step 3: The clinician prepares your skin

The skin on your chest, wrists, and ankles is cleaned with a mild alcohol wipe to remove oils or lotions. This ensures the electrodes stick properly and pick up a clean signal.

Step 4: Ten electrodes are attached

The British Heart Foundation explains that ten small sticky patches are placed on the chest, arms, and legs. These are connected by wires to the ECG machine, which picks up the electrical signals from your heart.

Step 5: You lie still for the recording

You will be asked to lie flat and breathe normally. Moving can affect the results, so staying relaxed and still for the 30 to 60 seconds of actual recording is important. The machine does all the work.

Step 6: The electrodes are removed

Once the trace is complete, the electrodes are peeled away gently, similar to removing a plaster. There is no electricity passed into the body at any point.

Step 7: Results are reviewed

At The Private GP, we can review your results within minutes. If anything requires further investigation, we will discuss next steps with you clearly and calmly.

Where Are the Electrodes Placed on a Woman?

For women, electrode placement is the most important technical consideration during an ECG, and it is worth understanding clearly.

The six chest electrodes (called V1 to V6) are placed at specific anatomical landmarks along the ribcage. Their positions are defined by bone structure, not by body shape or size. V1 and V2 sit either side of the breastbone at the fourth intercostal space. V4 sits at the fifth intercostal space at the midclavicular line. V3 falls midway between V2 and V4. V5 and V6 align horizontally with V4 at the side of the chest.

For women, the challenge arises when breast tissue covers some of these landmarks. Guidelines from the Society for Cardiological Science and Technology (SCST) — the UK’s gold standard authority on ECG recording — state that electrodes V4, V5, and V6 should be placed beneath the breast when breast tissue overlies the correct anatomical position.

This matters because placing electrodes on top of significant breast tissue can attenuate the electrical signals, which risks producing false readings. GE Healthcare UK notes that breast implants can also affect signal pathways, potentially leading to results that could be misread as cardiac abnormalities if the clinician is not aware. Always inform your clinician if you have implants or have had breast surgery.

The SCST guidelines also advise that the clinician can use the back of the hand to gently lift the breast when positioning electrodes, minimising direct contact while maintaining accuracy. A well-trained clinician will handle this professionally and discreetly.

The four limb electrodes — placed on the wrists and ankles — are straightforward and the same for everyone.

What Should a Woman Do Before an ECG?

Preparation for an ECG is minimal, which is one of the reasons the test is so convenient. NHS Inform confirms that you can eat and drink normally beforehand. There is no fasting required and no recovery time needed afterwards.

A few simple steps will help ensure you get the clearest possible result.

Avoid applying lotion, body cream, or oil to your chest, arms, or legs on the day of the test. These can affect how well the electrodes stick to the skin.

Wear a two-piece outfit if possible. A top you can remove easily, combined with a separate skirt or trousers, means you can keep your lower half covered throughout the test, which helps with comfort and privacy.

Remove any jewellery — particularly necklaces, bracelets, or anklets — before you arrive, as metal close to the electrode sites can occasionally cause interference.

Let your clinician know if you are pregnant, currently in your menstrual cycle, going through menopause, or taking any medications that affect your heart. These factors can all influence how your results are interpreted, and a good clinician will factor them in.

Avoid intense exercise immediately before the test. A brisk walk to the clinic is absolutely fine.

Will Your Privacy and Modesty Be Respected?

Yes, fully. Privacy and comfort are treated as non-negotiable throughout the process.

An ECG is carried out in a private room. You will be offered a gown or drape so that only the specific areas required for electrode placement are accessible. Cancer Research UK’s patient guidance confirms that patients can request a chaperone — another healthcare professional in the room — at any time. If this has not been offered and you would like one, simply ask.

The actual recording takes less than a minute. The clinician will explain each step before it happens, so there are no surprises. If at any point you feel uncomfortable, you are free to pause and ask questions.

At The Private GP, our home visit service is also available for patients who would prefer a clinical assessment in the comfort of their own home.

How Can ECG Results Look Different in Women?

When a clinician reads your ECG trace, they do not use a one-size-fits-all standard. Sex, age, and clinical symptoms all influence how results are interpreted — and for good reason, because there are genuine physiological differences between men’s and women’s ECG patterns.

Research published in PMC’s cardiovascular journals confirms that from adolescence onwards, women tend to have a faster resting heart rate and a longer QT interval than men. The QT interval is the section of the ECG trace that reflects how the heart’s lower chambers recharge between beats. A longer QT interval in women is considered normal, but it also means women are more susceptible to certain arrhythmias, particularly when taking medications that affect this interval.

The corrected QT interval (QTc) is considered prolonged if it is greater than 460 milliseconds in women — a different threshold to that used for men. Using the wrong reference range could lead to a missed or incorrect diagnosis.

Women also tend to show different T-wave morphology and more ST segment variation compared to men. These differences are normal, but they require a clinician who understands female cardiac physiology.

This is precisely why a consultation with an experienced GP — not just an automated reading — is so important. Our doctors at The Private GP review every ECG result in the context of your full clinical picture.

What Happens After Your ECG?

Once the recording is complete, the trace is reviewed by a doctor. At The Private GP, we can perform ECGs on site and have results ready within minutes.

If your ECG is normal, your doctor will reassure you and discuss whether any lifestyle adjustments or further monitoring might be beneficial, depending on your symptoms and risk factors.

If your ECG shows something that requires further investigation, this does not necessarily mean something is seriously wrong. Many findings on an ECG require context — your blood results, blood pressure, and symptoms all form part of the picture. Your doctor may recommend:

A full health check-up including blood pressure and cholesterol assessment. Private blood tests to check cardiac markers such as a BNP blood test, which measures a hormone released when the heart is under strain. A 24-hour Holter monitor, which records your heart’s activity continuously over a day or two to capture any intermittent rhythm changes. A referral to a consultant cardiologist if specialist input is needed.

We believe in clear, open communication. You will always leave knowing what your results mean and what, if anything, needs to happen next.

Frequently Asked Questions

• Does an ECG hurt?

No. An ECG is completely painless. The only mild sensation is when the sticky electrodes are removed from the skin afterwards, similar to peeling off a plaster. No electricity is passed into your body at any point during the test.

• Can I have an ECG during my period or if I am pregnant?

Yes, an ECG is safe in both situations. It uses no radiation and is entirely non-invasive. NHS Inform confirms there is no special preparation required. Simply let your clinician know, as hormonal changes during pregnancy or your menstrual cycle can influence how certain readings are interpreted.

• How long does an ECG take at The Private GP?

The recording itself takes less than a minute. Including preparation and electrode placement, the full process takes around 5 to 10 minutes. Results are reviewed and discussed with you on the same day.

• Does breast size affect the accuracy of an ECG?

It can, if electrodes are not positioned correctly. This is why trained clinicians follow SCST guidelines and place chest electrodes V4, V5, and V6 beneath the breast when needed, ensuring the signal reaches the correct anatomical landmark. At The Private GP, accuracy of placement is always a priority.

• Can an ECG detect all heart problems in women?

An ECG is an excellent first-line tool, but it does not detect every condition. The British Heart Foundation explains that an ECG has some limitations and is often used alongside other tests such as blood tests, echocardiograms, or a 24-hour Holter monitor for a more complete assessment. Your doctor will advise whether further investigation is needed based on your symptoms and results.