摘要:患者女性,38岁.阵发性胸闷,心悸伴头晕或晕厥2月余,每次发作后即来院检查:血压96/60mmHg,听诊心肺无异常,常规心电图正常:x线胸透,实验室检查及超声心动图均未见明显异常.行24h DCG监测.14:24分患者坐在沙发上看书时突然感到胸闷、气促头晕,经5min症状自行缓解,其余时间无不适感.DCG分析可见(图1)14:24:22分在规整的90次/min窦性心律中,突然出现一系列宽大畸形QRS波,心室率匀齐220次/min,第一个宽大QRS波后可见一窦性P波被干扰,经过39s 143个室性心搏后自行终止.终止时有0.76s的代偿间歇.发作前后对比心率,P、QRS、T波均无明显改变,也未见提前出现的QRS波,发作后ST段呈上斜型下移0.1mm,约3min恢复至基线.动态心电图诊断:①窦性心律;②特发性室性心动过速.
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