Dilated cardiomyopathy is a type of heart disease characterized clinically by a significant enlargement of the heart, a marked reduction in ejection fraction, and a significant decline in heart function. Common clinical manifestations of this disease often present as heart failure symptoms, including chest tightness and shortness of breath after activity, nocturnal paroxysmal breathing difficulties, inability to lie flat, as well as swelling of the lower limbs and abdominal wall, and even conditions such as pleural effusion and ascites. Additionally, it may be associated with various types of arrhythmias, such as premature beats and tachycardia, especially ventricular tachycardia, which are all manifestations of dilated cardiomyopathy.