患者，女，70岁，因进食冷冻西瓜约100g后即出现上腹部偏左阵发性疼痛伴心悸、气短2h，于1996年3月23日来我院急诊，其间无恶心、呕吐及腹泻。既往有高血压病史，近2年偶有心前区不适感，未经系统诊疗，否认心肌梗死、糖尿病及本次患病类似症状发生史。体格检查：神志清楚、急 Patients, female, 70 years old, after eating frozen watermelon about 100g appeared after the upper abdomen left paroxysmal pain accompanied by heart palpitations, shortness of breath 2h, came to our hospital on March 23, 1996 emergency room, during which no nausea, vomiting and diarrhea. Past history of hypertension, occasional precordial discomfort in the past 2 years, without systematic diagnosis and treatment, deny the history of myocardial infarction, diabetes and similar symptoms of this illness. Physical examination: conscious, urgent