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本图基本节律为窦性,所示4行心电图中每行有1—2个早搏,该早博具有室上性早博的特点:1.QRS起始向量与窦性者一致;2.QRS虽有畸形,但从V_1导联看其形态是右束支阻滞型,其畸形程度随着配对间期缩短而加重,符合室上性激动伴室内差异传导的特征。该早搏的代偿间歇大多数不完全,首先要考虑早搏起源于心房,而p′波重叠于前一窦性心动的T波(简称窦性T波)上。但用其它窦性T波作比较,似未能发现早搏前一窦性T波右形态和高低变化,
The basic rhythm of this figure is sinus, as shown in the 4 lines of ECG with 1-2 premature beats per row, which has the characteristics of supraventricular premature beats: 1. QRS start vector is consistent with sinus; 2. QRS Although deformity, but the V_1 lead to see its shape is right bundle branch block type, the degree of deformity with the shortening of the pairing interval and aggravate, consistent with supraventricular tachycardia with the characteristics of differential conduction. The compensatory intermittence of the premature beats most of the incomplete, we must first consider the origin of premature beats in the atrium, and p ’wave overlap in the previous sinus T wave (sinus T wave). However, compared with other sinus T wave, it seems unable to find the right before premature sinus T wave right and the level of change,