Levites R, Toor M, Haft J I
Am Heart J. 1976 Jan;91(1):79-82. doi: 10.1016/s0002-8703(76)80437-1.
Complete heart block developed during HBE studies in a patient with left bundle branch block, after inadvertent catheter-induced trauma to the right bundle branch. Normal intraventricular conduction (HV interval) was documented during the initial part of the study, and was demonstrated to be markedly prolonged after the appearance of heart block. Conduction through the right bundle branch improved over a short period of time as manifested by steplike shortenings of the HV interval, until the original conduction velocity was re-established. This case strongly supports the concept that the His-Purkinje system is capable of varying its conduction velocity and further demonstrates that, in patients with bundle branch block, a prolonged HV interval indicates disease of the remaining bundle branch.
在对一名左束支传导阻滞患者进行希氏束电图（HBE）检查期间，因不经意间导管导致右束支创伤，发生了完全性心脏传导阻滞。在研究初期记录到正常的室内传导（HV间期），而在心脏传导阻滞出现后，该间期显著延长。随着HV间期呈阶梯状缩短，提示右束支传导在短时间内有所改善，直至恢复到原来的传导速度。该病例有力地支持了希氏 - 浦肯野系统能够改变其传导速度这一观点，并且进一步表明，在束支传导阻滞患者中，HV间期延长提示剩余束支存在病变。
