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患者男,21岁。2年前感冒后出现心悸、胸闷,严重时伴心前区疼痛及乏力,休息后症状可减轻。劳动能力下降。曾四次发生晕厥,均发生于剧烈活动时,其间未做过任何检查及治疗。1月来病情加重,休息时亦出现上述症状,轻微活动即感心前区疼痛。2天前描记心电图提示房性心动过速伴2∶1房室传导阻滞,于1990年3月5日入院。查体;
Patient male, 21 years old. 2 years ago after a cold heart palpitations, chest tightness, severe pain and fatigue with precordial symptoms after rest can be reduced. Decrease in working ability. Syncope occurred four times, both during intense activity, during which time no examination or treatment was performed. In January, the condition worsened, and the above symptoms also appeared during rest. Slight activity meant the pain in the anterior region. 2 days ago Marked ECG showed atrial tachycardia with 2: 1 atrioventricular block was admitted on March 5, 1990. Physical examination