Health condition
Cardiomyopathy overview
Cardiomyopathies are diseases of the heart muscle itself - dilated, hypertrophic, arrhythmogenic and restrictive types. Many are inherited, and modern care includes family screening.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Possible symptoms: breathlessness, palpitations, chest pain, fainting during exertion - or no symptoms at all, found through screening
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Seek urgent assessment for exertional fainting or a family history of sudden unexplained death under 40
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Specialist: a consultant cardiologist usually leads assessment and treatment
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Treatment is tailored to the type: heart failure medication, arrhythmia management, implantable defibrillators for those at risk, and genetic testing with cascade family screening
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Unlike coronary disease, cardiomyopathy is a problem of the muscle rather than the blood supply. Dilated cardiomyopathy stretches and weakens the pump; hypertrophic cardiomyopathy thickens it; arrhythmogenic cardiomyopathy replaces muscle with scar and fat; restrictive forms stiffen it. Genetics, viral infection, alcohol, chemotherapy and pregnancy are among the causes.
Diagnosis and treatment routes
Assessment centres on echocardiography and cardiac MRI, with genetic testing where an inherited form is suspected - which then allows relatives to be screened. Most people with cardiomyopathy live full lives on modern treatment; the priority is identifying the minority at risk of dangerous rhythms who benefit from a defibrillator. In many parts of the UK, routine NHS referrals for this kind of problem currently take 20-45+ weeks, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant cardiologist. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Cardiomyopathy overview.
Quick, plain-English answers to what people ask us most.
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What is cardiomyopathy?
Cardiomyopathy is a disease of the heart muscle itself, making it harder for the heart to pump blood effectively. There are several types, including dilated, hypertrophic and restrictive cardiomyopathy, each affecting the heart muscle in a different way. It can be present from birth, inherited, or develop later in life from another cause.
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What causes cardiomyopathy?
Causes vary by type and include inherited genetic mutations, longstanding high blood pressure, viral infections affecting the heart, excessive alcohol use, certain chemotherapy drugs, and pregnancy-related changes. In many cases, particularly hypertrophic cardiomyopathy, a genetic cause runs in the family. Sometimes no clear cause is identified despite thorough investigation.
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What are the symptoms?
Common symptoms include breathlessness, fatigue, swelling in the legs, palpitations, and occasionally fainting or chest discomfort. Some people, especially in early hypertrophic cardiomyopathy, have no symptoms at all and are diagnosed after a family screening or an abnormal test result. Symptom severity varies widely between individuals and cardiomyopathy types.
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Is cardiomyopathy hereditary?
Many forms, particularly hypertrophic and some dilated cardiomyopathies, are caused by inherited gene mutations and can run in families. Genetic testing and family screening with echocardiography are often recommended once someone is diagnosed. Not all cardiomyopathies are genetic, however — some are acquired from other conditions.
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Can cardiomyopathy be treated or cured?
There is often no outright cure, particularly for inherited forms, but treatment can significantly control symptoms and reduce complications through medications, lifestyle adjustments, and in some cases devices such as pacemakers or defibrillators. Severe cases may eventually require advanced treatments including heart transplantation. Early diagnosis and treatment generally improve long-term outcomes.
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How long can you live with cardiomyopathy?
Outlook varies considerably depending on the type, severity, and response to treatment — many people live long, active lives with good management, while more advanced or aggressive forms carry greater risk. Regular specialist cardiology follow-up helps track the condition and adjust treatment as needed. Advances in treatment continue to improve long-term outcomes.
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When should I see a cardiologist?
See a cardiologist if you have unexplained breathlessness, palpitations, fainting, or a family history of cardiomyopathy or sudden cardiac death. NHS cardiology referral can take several weeks; a private consultation is typically available within about 2 weeks for prompt assessment including echocardiography.