What is it?
Dilated cardiomyopathy is defined by an ejection fraction (EF) of less than 40% in the presence of increased left ventricular end-diastolic volume.
Dilated cardiomyopathy can affect one or all four cardiac chambers and does not involve myocardial hypertrophy. As the chamber enlarges, the myocardial fibrils overstretch and their ability to effectively contract is impaired.
The mortality rate for dilated cardiomyopathy is 50% within five years of diagnosis. Death is often sudden and attributed to ventricular dysrhythmias, stroke, or progressive heart failure
The weakened and stretched myocardial fibers cause a decreased CO, resulting in backflow and pulmonary, and venous congestion.