According to Beaumont Health System, cardiomyopathy is any disease of the heart muscle in which the heart loses its ability to pump blood effectively. In some instances, heart rhythm is disturbed and leads to arrhythmias (irregular heartbeats). There may be multiple risks of hypertrophic cardiomyopathy, including viral infections. Sometimes, the exact cause of the muscle disease is never found. Click here to learn more about HCM.