Dilated cardiomyopathy: A disorder in which the chambers of the heart are dilated (enlarged) because the heart muscle is weakened and cannot pump effectively. There are many causes, the most common being myocardial ischemia (not enough oxygen supplied to the heart muscle) due to coronary artery disease.
Quick GuideHeart Disease: Causes of a Heart Attack
Subscribe to MedicineNet's Heart Health Newsletter
Healthy Heart Resources
Last Editorial Review: 6/9/2016