Enalapril maleate tablets, indications: 1. Essential hypertension in different stages. Renal vascular hypertension. All levels of heart failure in patients with symptomatic heart failure. It is also suitable for: improving survival rate: delaying the progress of heart failure; Reduce hospitalization caused by heart failure. 4. Prevention of symptomatic heart failure For patients with asymptomatic left ventricular dysfunction, it is suitable for: delaying the progress of symptomatic heart failure: reducing hospitalization caused by heart failure. 5. Prevent coronary artery ischemic events in patients with left ventricular dysfunction. Applicable to: reducing the incidence of myocardial infarction: reducing hospitalization caused by unstable angina pectoris.