3. Patients who have hypertension and blood pressure are not well controlled after treatments with antihypertensive drugs (systolic pressure > 150mmHg, diastolic pressure >100mmHg); patients who have grade II or higher myocardial ischemia or myocardial infarction and poorly controlled arrhythmia (including QTC interval≥ 450ms) and grade III-IV cardiac insufficiency according to NYHA criteria; Ultrasound Cardiogram on heart: LVEF (left ventricular ejection fraction)＜50%;