An irregular heartbeat can feel like fluttering, skipped beats, a racing pulse or a sudden thump. These sensations are often called palpitations. They may be brief and harmless, but sometimes they need medical assessment. If you are looking for a cardiologist London for an irregular heartbeat, it helps to know what an appointment can clarify, what information to bring and which symptoms need urgent attention. Our guide explains when to see a cardiologist for palpitations and what symptoms to take seriously.
This practical guide, prepared for readers considering care in October 2026, explains how a specialist assessment may work. It is general information, not a diagnosis or a substitute for advice from a healthcare professional. Learn more about cardiology tests available in London, including investigations that may help assess an irregular heartbeat.
When should an irregular heartbeat be assessed?
Consider speaking to a GP or cardiologist if palpitations are new, keep returning, last longer than usual, are becoming more frequent, or affect your daily activities. Assessment may also be appropriate if you have a known heart condition, a family history of heart problems, or symptoms such as dizziness or unusual breathlessness alongside the palpitations. If you are preparing for an appointment, read what happens at a cardiology consultation.
A sensation of an irregular heartbeat does not, by itself, identify the cause. Palpitations can be associated with factors such as stress, caffeine, alcohol, some medicines or an abnormal heart rhythm. Other health conditions can also contribute. A clinician can consider your symptoms and health history before deciding whether tests or treatment are needed. For more guidance on finding the right cardiologist in London, see our guide to choosing a specialist.
Seek emergency help now if palpitations are accompanied by chest pain or pressure, fainting or collapse, severe shortness of breath, or another sudden, severe symptom. Call 999 in the UK. Do not wait for a private appointment to deal with a possible emergency. If you need urgent advice but it is not an emergency, NHS 111 can help you decide what to do next.
What can a cardiologist do for an irregular heartbeat?
A cardiologist is a doctor who specialises in the heart and circulation. For palpitations, a cardiologist will usually start by understanding what the episodes feel like, when they happen and whether other symptoms occur. The aim is to assess possible causes and decide whether further investigation or treatment is appropriate—not to assume every palpitation is a serious rhythm problem.
Dr. Chabok provides cardiology consultations, diagnosis and treatment, including heart investigations and interventional procedures. The website lists clinics in London and Harefield. When arranging care, check the current clinic locations, appointment process and whether the service suits your needs.
What happens at a first cardiology appointment?
The consultation commonly includes a discussion of your symptoms, relevant medical history and any medicines or supplements you take. The cardiologist may ask about heart conditions in your family, previous investigations and factors that seem to trigger or relieve an episode. They may also check your pulse and blood pressure and examine you, depending on your situation.
It can be useful to bring a list of medicines, details of previous test results and a record of your symptoms. If you have a smartwatch or other device that recorded an episode, you can ask whether the information is helpful. A device reading is not always a clinical diagnosis, and it should not delay urgent care.
What tests might investigate palpitations?
Tests are selected according to your symptoms and clinical assessment. You may not need every test listed here.
- Electrocardiogram (ECG): records the heart’s electrical activity, usually over a short period. It may identify an abnormal rhythm if one is happening during the recording.
- Ambulatory ECG monitoring: a portable monitor records heart rhythm over a longer period. The type and duration depend on how often symptoms occur.
- Echocardiogram: an ultrasound scan that provides information about the heart’s structure and pumping function when clinically indicated.
- Blood tests: may be considered to check for health issues that could contribute to symptoms.
A short ECG can be normal if the episode has stopped before the test. That does not automatically rule out an intermittent rhythm problem. A clinician may consider longer monitoring or another approach, depending on the pattern of symptoms and your overall health.
How to prepare for an appointment in London
Whether you are booking in London or Harefield, a little preparation can make it easier to explain what has been happening. During October, when work, travel and seasonal routines may be changing, a simple note on your phone can help you capture details rather than relying on memory.
- Write down when each episode starts, how long it lasts and how often it happens.
- Describe the sensation: for example, racing, fluttering, skipped beats or pounding.
- Note what you were doing at the time and any possible triggers, without assuming a trigger is the cause.
- Record other symptoms, such as dizziness, chest discomfort or breathlessness, and whether they occurred at the same time.
- Bring a current medicine list, relevant medical history and any previous ECG or heart test reports you have.
- Prepare questions about possible causes, the need for monitoring, treatment choices and what follow-up may involve.
If symptoms are happening now, are severe or are accompanied by emergency warning signs, seek urgent help rather than waiting to collect records or attend a planned consultation.
Choosing a cardiologist in London
When comparing private cardiology options, focus on practical and clinical fit. Check that the clinician assesses the type of symptoms you have, where consultations take place, how investigations are arranged and how results and follow-up are handled. Ask about referral or booking requirements and whether any tests are conducted at the clinic or elsewhere.
It is reasonable to ask what the consultation includes and what may happen if further assessment is needed. Confirm fees and any related investigation costs directly with the provider before booking; they can vary. A private consultation is one route to specialist assessment, but it does not replace emergency services or guarantee that a particular test or treatment will be recommended.
What if the assessment finds an abnormal rhythm?
The next step depends on the rhythm identified, your symptoms, medical history and overall risk. Some findings may call for monitoring or follow-up; others may lead to a discussion about treatment. If atrial fibrillation or another rhythm condition is diagnosed, the cardiologist can explain what it means and discuss appropriate options. Do not start, stop or change prescribed medicines on the basis of a wearable alert or general online advice.
Ask the cardiologist to explain the result in plain language, whether it needs action now, what symptoms should prompt urgent help and when to arrange follow-up. If no abnormality is captured during testing but symptoms continue, tell your clinician; the pattern may help guide what to consider next.
Frequently Asked Questions
Can an ECG miss an irregular heartbeat?
Yes. A standard ECG records heart activity for a short time, so an intermittent episode may not occur during the test. A clinician may consider longer-term monitoring if it is appropriate.
Should I see a cardiologist for occasional palpitations?
Occasional palpitations are not always a sign of heart disease. Seek medical advice if they are new, recurrent, worsening, concerning to you or accompanied by other symptoms. A GP or cardiologist can advise on assessment based on your circumstances.
Can a smartwatch diagnose an abnormal rhythm?
A smartwatch may record a pulse or flag a possible rhythm change, but it does not replace clinical assessment. Save or show relevant records to a clinician if useful, and seek urgent help for severe symptoms regardless of what the device shows.
When should I call 999 for palpitations?
Call 999 if palpitations occur with chest pain or pressure, fainting or collapse, severe shortness of breath, or another sudden, severe symptom. Do not drive yourself if you may be seriously unwell.
Do I need a referral to see a private cardiologist in London?
Booking and referral requirements vary by provider. Check directly with the clinic before arranging an appointment, and ask how investigations and follow-up are organised.
Frequently Asked Questions
Can an ECG miss an irregular heartbeat?
Yes. A standard ECG records heart activity for a short time, so an intermittent episode may not occur during the test. A clinician may consider longer-term monitoring if it is appropriate.
Should I see a cardiologist for occasional palpitations?
Occasional palpitations are not always a sign of heart disease. Seek medical advice if they are new, recurrent, worsening, concerning to you or accompanied by other symptoms. A GP or cardiologist can advise on assessment based on your circumstances.
Can a smartwatch diagnose an abnormal rhythm?
A smartwatch may record a pulse or flag a possible rhythm change, but it does not replace clinical assessment. Share relevant records with a clinician if useful, and seek urgent help for severe symptoms regardless of what the device shows.
When should I call 999 for palpitations?
Call 999 if palpitations occur with chest pain or pressure, fainting or collapse, severe shortness of breath, or another sudden, severe symptom. Do not drive yourself if you may be seriously unwell.
Do I need a referral to see a private cardiologist in London?
Booking and referral requirements vary by provider. Check directly with the clinic before arranging an appointment, and ask how investigations and follow-up are organised.