Atrioventricular nodal reentrant tachycardia and the dilemma of reentry circuit components: A proof of concept

Abstract

Figure 3 Atypical atrioventricular nodal reentrant tachycardia alternating atrioventricular and ventriculoatrial block. A: An alternating infra-Hisian and upper common pathway (UCP) block at each every other cycle is shown. B: Green and red arrows represent fast and slow pathway activation, respectively. AVN 5 atrioventricular node; HB 5 His bundle; LCP 5 lower common pathway.