The clinical manifestations of hypertrophic obstructive cardiomyopathy are as follows: 1, dyspnea: mostly after exertion, due to decreased left ventricular compliance, increased end-diastolic pressure, followed by increased pulmonary venous pressure resulting in pulmonary stasis; 2, precordial pain: most often after exertion; 3, fatigue, dizziness and fainting: most often occurs during activities; 4, palpitations: due to cardiac hypoplasia or cardiac arrhythmia; 5, heart failure: most often seen in the advanced stage Patients due to myocardial compliance is reduced, can be seen in the ventricular end-diastolic pressure increased significantly, followed by atrial pressure rise combined with atrial fibrillation. In advanced patients, myocardial fibrosis is extensive, myocardial contractile function is weakened, followed by heart failure and sudden death.