Cardiomyopathy is a disease of the heart muscle. The heart loses its ability to pump blood and, in some instances, heart rhythm is disturbed, leading to irregular heartbeats, or arrhythmias. Usually, the exact cause of the muscle damage is never found.

Cardiomyopathy differs from many other heart disorders in a couple of ways. First, it is fairly uncommon, affecting about 50,000 Americans. However, the condition is a leading reason for heart transplantation.

Second, unlike many other forms of heart disease that affect middle-age and older persons, cardiomyopathy can, and often does, occur in the young. The condition tends to be progressive and sometimes worsens fairly quickly.

Nonischemic Cardiomyopathy
There are various types of cardiomyopathy, which fall into two major caregories: “ischmetic” and “nonismetic” cardiomyopathy.
Ischmetic cardiomyopathy typically refers to heart muscle damage that results from coronary artery disease, such as heart attack. This type of cardiomyopathy is discussed under heart attack.

Nonischemic cardiomyopathy consists of several forms, and the three main types are covered in this section. They are: dilated, hypertrophic, and restrictive. The name of each describes the nature of its muscle damage.