Familial Hypertrophic Cardiomyopathy: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Familial Hypertrophic Cardiomyopathy?
A cardiologist, a doctor who specializes in the heart, usually treats familial HCM. Some have extra training in inherited heart conditions, and a primary care doctor often makes the first referral. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is familial hypertrophic cardiomyopathy?
Familial hypertrophic cardiomyopathy is an inherited heart condition in which the heart muscle becomes unusually thick. The word familial means it runs in families. Cardiomyopathy means disease of the heart muscle. The thickened muscle can make it harder for the heart to pump blood the way it should.
Hypertrophic cardiomyopathy, often called HCM, causes the walls of the heart's main pumping chamber to thicken, usually between the lower chambers. The chamber then holds less blood, and the muscle may become stiff.
Symptoms
Many people with HCM have no symptoms and may only learn about it through a relative's diagnosis or a routine test. When symptoms appear, they can include shortness of breath, chest pain, a fast or fluttering heartbeat, fatigue, dizziness, or fainting.
Causes and who gets it
Familial HCM is caused by mutations in genes that build heart muscle proteins. It is passed down in an autosomal dominant pattern, so a child of an affected parent has a one in two chance of inheriting it. It affects roughly one in 500 people.
How doctors diagnose it
Doctors usually start with a physical exam, a family history, and an electrocardiogram. The main test is an echocardiogram, an ultrasound that shows the muscle's thickness and blood flow. Genetic testing can identify which relatives should be checked.
Treatment
Treatment depends on symptoms and how the condition affects the heart. Many people take medicines, such as beta blockers, which slow the heart rate and ease strain. People at higher risk of sudden cardiac arrest may receive an implantable defibrillator that shocks the heart back into rhythm. Some cases need surgery to remove part of the thickened muscle.
When to see a doctor
Anyone with chest pain, fainting, severe shortness of breath, or a racing heartbeat should see a doctor promptly. People with a close relative diagnosed with HCM should ask about screening, even if they feel fine.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either can order screening tests, review symptoms, and refer the patient to a cardiologist when HCM is suspected.
Common questions
Can people with familial HCM exercise?
Many people with HCM can exercise, but the right level differs from person to person. Doctors often advise avoiding intense competitive sports. A cardiologist can help set safe limits based on each person's test results.
Does everyone with the gene change get symptoms?
No. Some people who inherit the gene change never develop thickening of the heart or symptoms. Others develop problems as children, while some only learn about it in adulthood.
Should family members get tested?
Yes, close relatives are usually offered screening with an echocardiogram or genetic testing. Finding the condition early allows doctors to watch the heart and start treatment if needed. A genetic counselor can help families understand the results.
Can HCM be cured?
There is no cure, but treatments can control symptoms and lower the risk of serious problems. Many people manage the condition for decades. Results vary from person to person.
Sources
- MedlinePlus Genetics - Nonsyndromic hypertrophic cardiomyopathy
- National Heart, Lung, and Blood Institute - Cardiomyopathy - Types
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
