病例介绍患者男，55岁，因活动后心慌、胸闷，气急反复发作3年，后加重伴夜间不能平卧1个月，于1992年6月1日以“冠心病，陈旧性测壁，正后壁心肌梗塞，心功能Ⅳ级”而入院。查心电图为：“窦性心律伴多源颁发室性早搏。”经强心、利尿、扩张冠状动脉、营养心肌等治疗后，效果? Case description Male patient, 55 years old, because of activity after palpitation, chest tightness, shortness of breath recurrent episodes of 3 years, after aggravating with night can not lie 1 month, on June 1, 1992 to “coronary heart disease, Posterior wall myocardial infarction, cardiac function Ⅳ grade ”and admitted to hospital. Check electrocardiogram is: “sinus rhythm associated with multiple sources of premature ventricular contractions issued.” After cardiac, diuretic, dilated coronary artery, myocardial nutrition and other treatment, the effect?