Dilated cardiomyopathy is a relatively common disease in our daily lives. So, what is dilated cardiomyopathy? It refers to a disease characterized primarily by an enlarged heart and a severe reduction in the heart's pumping function. The cause of dilated cardiomyopathy is often unclear. Its clinical symptoms typically present as symptoms of heart failure, such as exertional dyspnea, or severe orthopnea and profuse sweating. Additionally, arrhythmias are also a common manifestation of dilated cardiomyopathy, such as atrial fibrillation, frequent premature ventricular contractions, and ventricular tachycardia. If diagnosed with dilated cardiomyopathy, it is essential to visit the department of cardiology at a hospital for specialized treatment and to take medication as prescribed. (The use of medication should be under the guidance of a professional doctor.)