Oreto G, Satullo G, Luzza F, Schamroth L
Chest. 1986 Apr;89(4):557-60. doi: 10.1378/chest.89.4.557.
The electrocardiogram recorded from a patient with third degree A-V block reflected almost regular A-V junctional escape rhythm. Some of the R-R cycles were slightly shorter than the basic escape cycle. A QRS complex ending such a relatively short R-R interval was always preceded by a sinus P wave, and had a QRS configuration which was minimally different from that of the escape complexes. The His bundle recording demonstrated that these minimally premature complexes were associated with an H-V interval which was shorter than that of the escape complexes. This indicates that the premature QRS complex could not be a capture beat. The relationship between the slightly premature QRS complex and the preceding sinus P-waves is explained on the basis of electrotonic potentiation or modulation to due Wedensky facilitation.
从一名三度房室传导阻滞患者记录的心电图显示出几乎规则的房室交界性逸搏心律。一些R-R周期略短于基本逸搏周期。以这样相对较短的R-R间期结束的QRS波群之前总是有一个窦性P波，并且其QRS形态与逸搏波群的形态仅有极小差异。希氏束记录显示，这些轻度提前的波群与一个短于逸搏波群的H-V间期相关。这表明提前出现的QRS波群不可能是夺获搏动。根据电紧张增强或韦德ensky易化引起的调制作用，解释了轻度提前的QRS波群与之前窦性P波之间的关系。
