Cardiomyopathy Clinic

Cardiologists in the Cardiomyopathy Clinic have specialised training, experience and expertise evaluating and treating people with all forms of the condition.

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What is cardiomyopathy?

The disease cardiomyopathy affects the heart muscle and makes it more difficult to pump blood. Cardiomyopathy is a dangerous, even deadly, condition that can lead to heart failure.

There are three main types of cardiomyopathy:

  • Dilated cardiomyopathy affects the left ventricle of the heart, which pumps blood out to the body. The disease causes the chamber to enlarge (dilate), so it can't effectively pump blood out of the heart.
  • Hypertrophic cardiomyopathy is an unusual thickening of the heart muscle. It affects the left ventricle, which is the heart's main pumping chamber. As heart muscle thickens, it can become difficult for the heart to work properly.
  • Restrictive cardiomyopathy concerns the heart muscle becoming rigid and less flexible. As a result, the heart can't expand properly between beats, so the amount of blood in each pump is lessened.

Besides the main types of cardiomyopathy, Mayo Clinic Healthcare cardiologists are also experts at treating rare forms, including:

  • Arrhythmogenic right ventricular dysplasia, which affects the right ventricle, replacing its muscle with scar tissue. The condition can lead to irregular heart rhythm.
  • Channelopathies, which are inherited heart muscle diseases associated with abnormal heart rhythms and increased risk of sudden cardiac death.
  • Unclassified cardiomyopathy. Other types of cardiomyopathy fall into this category.

Learn more about cardiomyopathy at