急性前壁心肌梗死R波、Q波和ST段演变速度的观察

目的 通过心电图对急性心肌梗死的诊断提供更多的信息。方法 对21例急性前壁心肌梗死患者进行R波、Q波和ST段变化进行同步12导联心电图动态观察。将开始到结束的7次标测分成6个时间间隔．分别计算各个时间间隔的∑R、∑Q、和∑ST的平均值和标准差。结果∑R于胸痛发作后12h内迅速下降；∑Q逐渐增大，24h内变化最显著；EST 12h内迅速下降，48h后渐趋稳定。12例（57％）R波消失，Q波在发病后12h内形成；另9例（43％）于24h内形成。结论心肌梗死后ST段抬高、R波下降和Q波形成在快速型和慢速型心肌梗死患者中不同。

The changes of R wave, Q wave and ST segment in the patients with acute anterior myocardial infarction

Objective To provide more information for the diagnosis of acutte myocardial infarction(AMI) by electrocardiograph(ECG).Methods 21 patients with AMI,the 12 leads synchronous ECG was recorded for 7 times in different time.The amplitude of R wave,Q wave and ST segment elevation of different time were measured and compared with each other.Results The amplitude of R wave and ST segment elevation decreased quickly in 12 hours after the chest pain onset.The amplitude of Q wave increased in 24 hours after the chest pain onset.In 12 patients(57%) R wave disappeared and Q wave formed in 12 hours,9 patients(43%) in 24 hours.Conclusions In quickly progressive AMI and slowly progressive AMI,the changes of R wave,Q wave and ST segment are different.