病例男孩,7岁,既往健康。因间歇性、非放射性胸骨下激烈疼痛3天来诊。每次发作持续近1个小时,多因身体活动诱发,每天发作高达5次。发作伴恶心,呕吐,休息后缓解,无发热。病前有1周鼻溢、偶尔的肌痛和咽痛病史。家族史中两个姨母分别于38岁、48岁时死于心肌梗塞。查体:患儿发育良,外貌健康,身高128cm,体重24.7kg,呼吸 Case boy, 7 years old, past health. Due to intermittent, non-radioactive sternum pain for 3 days to diagnosis. Each episode lasts nearly 1 hour, mostly due to physical activity induced attack up to 5 times a day. Attack with nausea, vomiting, rest after remission, no fever. 1 week before sickness, occasional history of myalgia and sore throat. Two aunties in family history died of myocardial infarction at the age of 38 and 48, respectively. Physical examination: Children with good development, good appearance, height 128cm, weight 24.7kg, breathing