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10例心律失常患者同步记录腔内窦房结电图(SNE_c)、体表窦房结电图(SNE_b)和EKG或高位古房电图(HRAE),发现SNE_b与SNE_c结果一致。窦律时SNE_c与SNE_b的A波前均有P前波,形态相似,体表窦房传导时间(SACT_b)与腔内窦房传导时间(SACT_c)高度相关(r=0.96,P<0.005);心脏起搏点移位时,SNE_c与SNE_b的A波前均无P前波,同时A波形态改变。SNE_c的P前波只在上腔静脉、右心房交界处窦房结解剖部位记录到,右心房的其它部位记录不到,在无心室活动的A-A波间,SNE_b、SNE_c的A波前仍有P前波;交界性逸搏V波前则无P前波。结论:SNE_c的P前波是窦房结电位,SNE_b与SNE_c的P前波系同一来源,是窦房结电活动在不同记录部位的反映。SNE_b无创伤,方法简便,可代替SNE_c在临床使用。
In 10 patients with arrhythmia, SNE_c, SNE_b and EKG or HRAE were recorded synchronously. The results of SNE_b and SNE_c were consistent. The sinus rhythm SNE_c and SNE_b A wave front have P wave front, similar in shape, surface sinoatrial conduction time (SACT_b) and intracavitary sinoatrial conduction time (SACT_c) highly correlated (r = 0.96, P <0.005); When the cardiac pacemaker was shifted, there was no P wave in the A wavefront of SNE_c and SNE_b, and the morphology of A wave changed at the same time. The anterior P wave of SNE_c was recorded only in the anatomy of the sinoatrial node at the junction of the superior vena cava and the right atrium and not recorded in the other parts of the right atrium. In AA wave without ventricular activity, the A waves of SNE_b and SNE_c remained P before the wave; borderline esophageal V wavefront without P P wave. CONCLUSIONS: The anterior P wave of SNE_c is the sinus node potential and SNE_b is the same source as the P P wave of SNE_c, reflecting the electrical activity of the sinoatrial node in different recorded sites. SNE_b no trauma, the method is simple, can replace SNE_c in clinical use.