MyCareQuestions Clinicians
Mark Hall, MD FRCP MBBS
Mid Cheshire Hospitals NHSFT, University Hospital of North Midlands, Alder Hey Children's HospitalCardiology: A Patient Guide to Heart Symptoms, Tests and Care
Cardiology is the medical specialty that focuses on the heart and blood vessels. A doctor who works in this area is called a cardiologist. Cardiologists help diagnose, treat and monitor heart problems, including chest pain, breathlessness, palpitations, high blood pressure, abnormal heart rhythms, heart valve disease and heart failure.
A cardiologist does not usually perform open heart surgery. That is the role of a cardiac surgeon. Instead, a cardiologist investigates what is happening, explains the likely causes, recommends tests, prescribes medicines, performs some procedures such as coronary angioplasty, and refers patients to other heart specialists when needed. These may include electrophysiologists for rhythm problems, interventional cardiologists for blocked arteries, heart failure specialists, imaging specialists, valve teams or cardiac surgeons.
Many patients see a cardiologist after a GP referral, an abnormal ECG, a hospital visit, a new diagnosis, or symptoms that are worrying or affecting daily life. A good cardiology appointment should help you understand three things: what might be causing your symptoms, what tests or treatments are needed, and what warning signs should prompt urgent help.
Disclaimer: This guide is for general information only. It is not medical advice and should not replace advice from your GP, cardiologist or emergency services.
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Conditions Treated by a Cardiologist
Coronary heart disease and angina: Coronary heart disease happens when the arteries supplying the heart muscle become narrowed, often due to fatty deposits. This can reduce blood flow to the heart and may cause chest pain, tightness, breathlessness, nausea or symptoms triggered by exercise or stress. Angina is the name often used for chest discomfort caused by reduced blood supply to the heart.
Heart attack care and recovery: A heart attack happens when the blood supply to part of the heart muscle is suddenly blocked. Cardiologists help diagnose heart attacks, arrange urgent treatment, and support recovery afterwards. Follow-up care may include medicines, cardiac rehabilitation, lifestyle planning, blood pressure control, cholesterol management and tests to assess heart function.
Heart failure: Heart failure does not mean the heart has stopped. It means the heart is not pumping blood as well as the body needs. Symptoms can include breathlessness, tiredness, swollen ankles or legs, waking at night short of breath, reduced exercise ability and feeling lightheaded. Cardiologists investigate the cause and help patients manage symptoms and reduce the risk of hospital admission.
Atrial fibrillation and other arrhythmias: Arrhythmias are abnormal heart rhythms. Atrial fibrillation, often called AF, is one of the most common and can make the heart beat irregularly and sometimes too fast. Symptoms may include palpitations, breathlessness, dizziness, fatigue or chest discomfort, although some people have no symptoms. Cardiologists assess rhythm problems and may refer patients to an electrophysiologist if specialist rhythm treatment is needed.
Heart valve disease: The heart has valves that keep blood moving in the right direction. If a valve becomes narrowed, leaky or stiff, the heart may have to work harder. Common examples include aortic stenosis, mitral regurgitation and aortic regurgitation. Symptoms may include breathlessness, chest tightness, dizziness, fainting, tiredness or reduced ability to exercise.
High blood pressure and heart strain: High blood pressure, also called hypertension, can quietly damage the heart and blood vessels over time. It can contribute to heart failure, stroke, kidney disease and coronary artery disease. Cardiologists may become involved when blood pressure is difficult to control, linked to symptoms, or has already affected the heart.
Cardiomyopathy and heart muscle disease: Cardiomyopathy is a disease of the heart muscle. The heart may become enlarged, thickened, stiff or weaker than normal. Some types are inherited, while others may be linked to high blood pressure, valve disease, infection, alcohol, chemotherapy or other causes. A cardiologist may arrange echocardiograms, cardiac MRI scans, rhythm monitoring and family screening where appropriate.
Inherited heart conditions and family risk: Some heart conditions can run in families, including certain rhythm disorders, cardiomyopathies and inherited cholesterol problems. A cardiologist may ask about relatives with heart disease, sudden unexplained death, fainting, pacemakers, defibrillators or early heart attacks. In some cases, family members may need screening or referral to an inherited cardiac conditions clinic.
Adult congenital heart disease: Congenital heart disease means a heart condition someone was born with. Some people are diagnosed as children and continue to need follow-up as adults. Others may only discover the issue later in life. Cardiologists help monitor heart structure, rhythm, valve function and exercise tolerance, and may work with specialist congenital heart teams.
Unexplained fainting, dizziness or blackouts: Fainting can have many causes, including simple faints, dehydration, blood pressure drops or heart rhythm problems. A cardiologist may become involved if the fainting happens during exercise, occurs without warning, is linked with palpitations or chest pain, or there is a family history of sudden cardiac death.
Common Cardiology Tests, Procedures and Treatments
Electrocardiogram (ECG): An ECG is a quick, painless test that records the electrical activity of the heart. Sticky patches are placed on the chest, arms and legs. It can help detect abnormal rhythms, signs of a previous heart attack, heart strain or changes that suggest reduced blood flow.
Echocardiogram: An echocardiogram, often called an echo, is an ultrasound scan of the heart. It shows the size of the heart chambers, how strongly the heart pumps, how the valves work and how blood moves through the heart. It is commonly used for heart failure, valve disease, murmurs, breathlessness and follow-up after certain heart problems.
Ambulatory ECG, Holter monitor or event recorder: Some rhythm problems come and go, so they may not appear on a standard ECG. A portable monitor can record the heart rhythm over 24 hours, several days or longer. This can help link symptoms such as palpitations, dizziness or blackouts with the heart rhythm at the time.
Blood pressure monitoring: A cardiologist may use clinic readings, home readings or 24-hour ambulatory blood pressure monitoring. This helps show whether blood pressure is truly high, whether treatment is working and whether readings change during sleep, stress or daily activity.
Blood tests: Blood tests can help assess cholesterol, diabetes risk, kidney function, thyroid function, anaemia and markers of heart strain or heart damage. These tests do not replace heart scans or ECGs, but they often help build the bigger picture and guide safer treatment decisions.
Exercise stress test: An exercise stress test checks how the heart responds during physical effort, usually on a treadmill or exercise bike. It may be used to assess chest pain, exercise tolerance, rhythm changes or whether symptoms appear during exertion. Some patients may need a different type of stress test if they cannot exercise safely.
CT coronary angiogram: An exercise stress test checks how the heart responds during physical effort, usually on a treadmill or exercise bike. It may be used to assess chest pain, exercise tolerance, rhythm changes or whether symptoms appear during exertion. Some patients may need a different type of stress test if they cannot exercise safely.
Invasive coronary angiogram: A coronary angiogram is a hospital procedure where a thin tube is passed through an artery, often from the wrist or groin, and dye is used to show the coronary arteries. It can help diagnose blocked arteries and guide treatment decisions. In some cases, treatment with a stent may be performed at the same sitting.
Coronary angioplasty and stent: Angioplasty is a procedure used to open a narrowed or blocked coronary artery. A small balloon is inflated inside the artery and a stent is often placed to help keep it open. This may be done for some patients with angina or during urgent treatment for a heart attack.
Cardioversion: Cardioversion is a treatment used for some abnormal heart rhythms, especially atrial fibrillation or atrial flutter. It aims to restore a more normal rhythm, either with a controlled electrical shock under sedation or sometimes with medicines. Not every patient with AF needs cardioversion, so the cardiologist will consider symptoms, stroke risk, heart structure and how long the rhythm problem has been present.
Cardiac medicines: Many heart conditions are managed with medicines. These may include blood pressure tablets, cholesterol-lowering medicines, blood thinners, rhythm-control drugs, heart failure medicines, anti-anginal medicines and diuretics to reduce fluid build-up. A cardiologist should explain what each medicine is for, what benefits are expected, and what side effects to watch for.
Referral for specialist procedures or surgery: Cardiology is often the gateway to more specialised heart care. A cardiologist may refer a patient for electrophysiology treatment, pacemaker or defibrillator assessment, structural heart procedures, valve intervention, cardiac rehabilitation, cardiac surgery or inherited cardiac condition review. The aim is to match the patient to the right team at the right time.
When to See a Cardiologist
You may be referred to a cardiologist by your GP, another specialist, an emergency department, or after an abnormal test. Common reasons include chest pain, breathlessness, palpitations, fainting, high blood pressure, abnormal heart sounds, abnormal ECG results, raised cholesterol, known heart disease or a family history of serious heart problems.
Chest pain should always be taken seriously. Some chest pain is not caused by the heart, but it is important not to guess. Pain that feels tight, heavy, squeezing, crushing, burning or pressure-like may need urgent assessment, especially if it spreads to the arm, neck, jaw, back or stomach, or comes with sweating, nausea, breathlessness or feeling faint.
Breathlessness is another common reason for cardiology referral. It may happen during exercise, when lying flat, at night, or during ordinary tasks that used to be easy. Breathlessness can come from the lungs, anaemia, anxiety, infection or poor fitness, but it can also be linked to heart failure, valve disease, rhythm problems or coronary disease.
Palpitations can feel like fluttering, racing, pounding, skipped beats or an irregular pulse. They may be harmless, but they matter more if they are new, frequent, prolonged, associated with dizziness, fainting, chest pain, breathlessness or if you already have heart disease.
You should also seek medical help if you notice swollen ankles or legs, sudden reduced exercise capacity, unexplained fatigue, dizzy spells, blackouts, a new heart murmur, high blood pressure that is hard to control, or strong family history of early heart disease or sudden unexplained death.
Call emergency services immediately if you have severe chest pain, chest pain that does not go away, severe breathing difficulty, collapse, or symptoms that feel like a possible heart attack. A routine cardiology appointment is not the right route for a medical emergency.
What to Expect at Your First Cardiology Appointment
A first cardiology appointment is usually a structured conversation, examination and planning session. The goal is to understand your symptoms, your risk factors, your test results and how your heart issue is affecting your life.
The appointment will often start with your story. The cardiologist may ask when symptoms began, what they feel like, how long they last, what brings them on, what eases them and whether they are getting worse. Try to describe symptoms in ordinary language. For example, “I get a tight band across my chest when walking uphill” is more useful than trying to use medical words.
You will likely be asked about your medical history. This may include high blood pressure, diabetes, cholesterol, kidney disease, stroke, thyroid disease, lung disease, previous heart problems, pregnancy-related complications, recent infections and any hospital admissions. Family history is important too, especially early heart attacks, sudden unexplained death, inherited heart disease, pacemakers, defibrillators or cardiomyopathy.
Bring a full list of medicines, including doses, inhalers, over-the-counter medicines and supplements. Also bring allergies, previous test results, hospital letters, ECGs, blood test results and a record of home blood pressure readings if you have them. If symptoms come and go, keep a simple diary noting time, activity, pulse if known, and how long the symptom lasted.
A physical examination may include blood pressure, pulse, oxygen levels, listening to the heart and lungs, checking the ankles for swelling and sometimes examining the neck veins or abdomen. Many cardiology clinics perform an ECG on the same day. Further tests may be arranged afterwards, such as an echocardiogram, Holter monitor, blood tests, CT coronary angiogram, stress test or cardiac MRI.
At the end, the cardiologist should explain the likely possibilities, what has been ruled out, what still needs checking and what happens next. You may be given treatment, lifestyle advice, a follow-up plan, safety-net instructions or referral to a more specialised heart team. It is reasonable to ask for the plan in plain English before you leave.
Some Sample Questions to Ask Your Cardiologist
What are the most likely causes of my symptoms, and what serious causes need to be ruled out?
Why you should ask this: This helps you understand whether the appointment is mainly about reassurance, monitoring, treatment or urgent investigation. It also stops the conversation becoming too vague.
Which tests do I need, and what decision will each test help us make?
Why you should ask this: Tests are most useful when they answer a clear question. Ask whether the test is looking at rhythm, blood flow, valves, heart muscle, blood pressure or future risk.
What are my treatment options, and what are the benefits and risks of each?
Why you should ask this: Many heart conditions can be managed in more than one way. Understanding medicines, procedures, lifestyle changes and watchful monitoring helps you take part in the decision.
What symptoms should make me seek urgent help?
Why you should ask this: Every patient should leave knowing their red flags. This is especially important if you have chest pain, breathlessness, fainting, palpitations, known coronary disease, heart failure or valve disease.
How will this condition affect my daily life, exercise, work, travel and family?
Why you should ask this: A heart diagnosis is not just a scan result. It affects confidence, independence and planning. Asking this question helps the cardiologist tailor advice to your real life, not just your test results.
Frequently Asked Questions About Cardiology
What is cardiology in simple terms?
What is the difference between a cardiologist and a cardiac surgeon?
When should I see a cardiologist for chest pain?
Can a cardiologist help with palpitations?
What tests might a cardiologist arrange?
Do all heart symptoms mean I have heart disease?
How should I prepare for a cardiology appointment?
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