患者吴某某,男性,46岁。因患风湿性心脏病,在我院门诊部就诊．每月给予肌肉注射法国产长效青霉素1次．每次120万u。当注射药4次（即第四个月）长效青霉素时，当天上午8时45分进行皮肤过敏试验，试验结果为阴性反应。9时5分给予肌注长效青霉素120万u．注射完毕，患者站立时．突 Patient Wu Moumou, male, 46 years old. Because of rheumatic heart disease, clinic treatment in our hospital. A monthly intramuscular injection of long-acting penicillin France 1 times. Each time 1.2 million u. When the injection 4 times (ie the fourth month) long-acting penicillin, the day 8:45 on the skin allergy test, the test result was negative. 9:51 to give intramuscular injection of long-term penicillin 1.2 million u. Injection is completed, the patient stands. sudden