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朱某,女,63岁,平时体健。突感剑突下疼痛,急诊入院。查心电图为窦性心律,P—R间期0.12秒,Ⅱ、Ⅲ,aVF导联呈Qrs型,Q波时限为0.06秒,ST—T无改变(见图1)。心电图诊断:下壁心肌梗塞。第二天心电图复查:aVF导联出现两种波形(见图2)。前为Qrs型,P—R间期为0.12秒,T波直立;后为R型,P—R间期0.16秒,T波倒置。第三天心电图复查:ⅡⅢ、avF导联Qrs波转为R型,T波由直立转为倒置,胸导V_4—V_7T波倒置,ST段压低0.05毫伏。心电向量图,也呈现两种图形(见图3)。H面初始20毫秒的预激向量指向左前,初始向量运行缓慢,QRS环体均位于X轴之前。5分钟后描记,QRS环体出现
Zhu, female, 63 years old, usually healthy. Sudden xiphoid pain, emergency admission. Check the electrocardiogram for sinus rhythm, P-R interval of 0.12 seconds, Ⅱ, Ⅲ, aVF lead Qrs type, Q wave limit of 0.06 seconds, ST-T unchanged (see Figure 1). ECG diagnosis: inferior myocardial infarction. The next day ECG review: aVF leads appear two waveforms (see Figure 2). Former Qrs type, P-R interval of 0.12 seconds, T wave upright; after the R-type, P-R interval of 0.16 seconds, T wave inversion. The third day of ECG review: Ⅱ Ⅲ, avF lead Qrs wave into R type, T wave from upright to inverted chest V-4-V_7T wave inversion, ST-segment depression of 0.05 millivolts. ECG vector diagram, also presented two graphics (see Figure 3). The initial 20 millisecond pre-excitation vector on H-plane points to the left and the initial vector runs slowly, with the QRS annulus in front of the X-axis. 5 minutes after the tracing, QRS rings appear