what is dilated cardiomyopathy
Definition. Dilated cardiomyopathy is a disease of the heart muscle, usually starting in your heart's main pumping chamber (left ventricle). The ventricle stretches and thins (dilates) and can't pump blood as well as a healthy heart can.ilated cardiomyopathy might not cause symptoms, but for some people it can be life-threatening. A common cause of heart failure â the heart's inability to supply the body with enough blood â dilated cardiomyopathy can also contribute to irregular heartbeats (arrhythmias), blood clots or sudden death.