The general mortality rate for individuals with cardiomyopathy is 20 percent at one year and 70 to 80 percent for individuals who have experienced heart failure, according to the American Academy of Family Physicians. Life expectancy varies by cause.
Cardiomyopathy is a progressive heart disease that affects the heart muscle's ability to pump blood. Many different factors cause cardiomyopathy, including certain drugs and coronary heart disease, according to Healthline. Symptoms include weakness and fatigue, difficulty breathing, dizziness, chest pain, heart palpitations, fainting, high blood pressure, and swelling of lower extremeties. Cardiomyopathy is organized into four general types, listed from most to least common: dilated, hypertrophic, arrhythmogenic right ventricular dysplasia and restrictive.