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.