双房室结通路——迷走神经对房室结传导的影响

Dual AV nodal pathways--vagal influences on AV nodal conduction.

作者信息

Ezri M D, Huang S K, Chhablani R, Denes P

出版信息

Pacing Clin Electrophysiol. 1983 Jul;6(4):697-701. doi: 10.1111/j.1540-8159.1983.tb05328.x.

DOI:10.1111/j.1540-8159.1983.tb05328.x

PMID:6192402

Abstract

This 52-year-old male presented with syncope and demonstrated two distinct PR intervals on the electrocardiogram. Electrophysiologic studies showed dual AV nodal pathways. Right-sided carotid sinus massage induced prolonged periods of sinus arrest with no change in AH interval. Left-sided carotid sinus massage produced long AH intervals (slow pathway conduction) with some slowing of sinus rate. Whenever sinus rhythm with slow pathway conduction was observed (long AH) a 20-30 mmHg drop systolic pressure was seen. Following implantation of an AV sequential pacemaker, the patient has been asymptomatic.

摘要

这位52岁男性因晕厥就诊，心电图显示有两种不同的PR间期。电生理研究显示存在房室结双径路。右侧颈动脉窦按摩导致长时间的窦性停搏，AH间期无变化。左侧颈动脉窦按摩导致AH间期延长（慢径路传导），窦性心率略有减慢。每当观察到伴有慢径路传导的窦性心律（长AH间期）时，收缩压会下降20 - 30 mmHg。植入房室顺序起搏器后，患者一直无症状。