Heart checkCardiomyopathy

What is cardiomyopathy?

Cardiomyopathy is a disease of the heart muscle. It can run in families and can affect more than one member of a family. Some family members may not be affected at all. 

There are three main types of cardiomyopathy:

  • Hypertrophic cardiomyopathy
  • Dilated cardiomyopathy
  • Arrhythmogenic right ventricular cardiomyopathy

What is hypertrophic cardiomyopathy?

Hypertrophic cardiomyopathy (HCM) is an inherited (genetic) condition which means it can be passed on through families.

If you have HCM, the cells of your your heart muscle wall are affected and become thickened making the heart muscle stiff. This makes it harder for your heart to pump blood around your body.

What is dilated cardiomyopathy?

When dilated cardiomyopathy (DCM) is diagnosed it might be that there is no-one else in your family has the condition. It can however be inherited too, passed on through families.

In DCM, the heart muscle wall becomes thin and floppy, and is described as being dilated. This makes the heart weak and it is difficult for it to pump blood around the body effficeintly. 

DCM can occur in some women in the late stages of pregnancy or shortly after birth. Excessive amounts of alcohol can also cause the condition.

What is arrhythmogenic right ventricular cardiomyopathy?

Arrhythmogenic right ventricular cardiomyopathy (ARVC) usually affects the right side of your heart. It is an inherited condition which means that it can be passed on through families.

In ARVC, the heart muscle cells are gradully replaced with fatty tissue. When this happens, your heart becomes weak and unable to pump blood around the body effectively. It usually takes many years for this to happen so most people are not diagnosed until later in life. 

What else do I need to know?

Although cardiomyopathy cannot be cured, there are many effective treatments that can help you to lead a normal life. In a few cases, there is a risk of sudden arrhythmic death (SADS). You should discuss this with your doctor who will be able to advise you about treatments available to you.

Because cardiomyopathies can be inherited, you should speak to your GP about screening for your family. You can also find out more information from the BHF Genetic Information Service on 0300 456 8383 Mon - Fri 0900 - 1800. All calls are charged at a local rate.

More information

You may also find it helpful to contact the Cardiomyopathy Association, who provide information and support on all types of cardiomyopathy.


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If you'd like to talk to someone about heart health issues please call <b>0300 330 3311</b>.

If you'd like to talk to someone about heart health issues please call <b>0300 330 3311</b>.
If you'd like to talk to someone about heart health issues please call 0300 330 3311.
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