Figure 3
(A) Intracardiac electrograms during sinus rhythm.
(B) Intracardiac electrograms during atrial entrainment pacing at 330 ms during the ventricular tachycardia with a cycle length of 345 ms.
(C) Schematic representation of the slow conduction zone of the ventricular tachycardia circuit and wavefront propagation during the atrial entrainment pacing.
The numbers indicate cycle lengths in ms. H = His bundle potential; LPF = left posterior fascicle; NCC = noncoronary cusp; RAS = right atrial septum; RB = right bundle; RVA = right ventricular apex; SCZ = slow conduction zone; VT = ventricular tachycardia; N-1 and N = N-1st orthodromic and N-th antidromic paced wavefronts. Other abbreviations are presented as in Figure 2.