患者男,58岁。因冠心病、心绞痛于1993年10月11日入院。经用易顺脉、倍他乐可、力平脂等治疗后,心前区疼痛等症状消失,上下四层楼无明显不适,但心电图仍呈缺血型改变,于11月5日作体外反搏。反搏治疗5分钟后,突感胸骨后剧烈压榨样疼痛,面色苍白、大汗淋漓。查心率116次/分,心尖部可闻及第四心音, Male patient, 58 years old. Due to coronary heart disease, angina was admitted on October 11, 1993. After the use of easy to run pulse, Betalocodone, Liping fat and other treatment, precordial pain and other symptoms disappear, up and down the four floors without significant discomfort, but still showed ischemic ECG changes in November 5 for in vitro Counterpulsation. After 5 minutes of counterpulsation treatment, sudden sensation after sternum press-like pain, pale, sweating. Check the heart rate 116 beats / min, the apex can be heard and the fourth heart sound,