Cardiomyopathy is a group of diseases that affect the heart muscle, impairing its ability to pump blood effectively. This condition is clinically significant as it can lead to heart failure, arrhythmias, and sudden cardiac death, necessitating careful monitoring and management. A common example is dilated cardiomyopathy, often associated with genetic factors or viral infections, which can result in significant morbidity and mortality if left untreated.