Cardiomyopathy is a common disease in our daily lives, characterized primarily by changes in the myocardium. After being diagnosed with cardiomyopathy, many patients often ask which department they should register with at the hospital. Generally speaking, cardiomyopathy falls under cardiovascular diseases, so registration should be with the department of cardiology. Cardiologists often prescribe a cardiac echocardiogram to diagnose myocardial diseases. Conditions such as hypertrophic cardiomyopathy or dilated cardiomyopathy require a cardiac echocardiogram for detection, which is the most commonly used examination for cardiomyopathy.