Kantharia B K, Mittleman R S
Section of Cardiac Electrophysiology and Pacing, Division of Cardiology, Department of Medicine, University of Massachusetts Medical Center, 55 Lake Avenue North, Worcester, Massachusetts 01565, USA.
J Interv Card Electrophysiol. 2000 Dec;4(4):605-10. doi: 10.1023/a:1026565531895.
The exact nature of the reentry circuit for the atrioventricular nodal reentrant tachycardia (AVNRT) and particularly the concept and role of the upper and lower common pathways is not well defined. Although it is well accepted that the His-Purkinje system and the ventricles are not an essential part of the tachycardia circuit, controversy still exists as to whether the atria are essential components of the circuit. We describe a patient in whom the AVNRT perpetuated despite the spontaneous development of 2:1 anterograde and 3:2 retrograde block. To our knowledge, such a combination of electrophysiological phenomenon has not been previously reported. The electrophysiological basis of these observations and their clinical implications are discussed.
房室结折返性心动过速（AVNRT）折返环路的确切性质，尤其是上、下共同通路的概念和作用尚未明确界定。尽管人们普遍认为希氏-浦肯野系统和心室并非心动过速环路的必要组成部分，但关于心房是否为环路的必要组成部分仍存在争议。我们描述了一名患者，尽管自发出现了2:1前向阻滞和3:2逆向阻滞，但AVNRT仍持续存在。据我们所知，这种电生理现象的组合此前尚未见报道。本文讨论了这些观察结果的电生理基础及其临床意义。
