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1943年Dressler首先根据室性早搏中的异常Q波(Q时间>0.04秒)对1例心电图仅表现完全性左束支阻滞的患者做出了心肌梗塞的诊断并由尸检证实。此后许多学者亦纷纷报告了用室性早搏中的Q波诊断心肌梗塞的病例,从而证明室性早搏中的Q波对诊断心肌梗塞有重要的价值。但也发现用此方法诊断心肌梗塞有一定的限制,可出现假阳性。
In 1943, Dressler first performed a diagnosis of myocardial infarction and confirmed autopsy on the basis of an abnormal Q wave (Q time> 0.04 second) in premature ventricular contractions in a patient who showed only complete left bundle branch block in the electrocardiogram. Since then, many scholars have also reported the use of Q waves in premature ventricular contractions in the diagnosis of myocardial infarction cases, which proves that premature ventricular contractions Q waves for the diagnosis of myocardial infarction has important value. But also found that the use of this method to diagnose myocardial infarction have some restrictions, there may be false positives.