FIGURE 12.

(A) Schematic diagrams of the 3 steps to diagnosing AVNRT with a bystander concealed nodoventricular (NV) pathway. Intracardiac electrograms and the schematic diagram in (B) fast‐slow AVNRT with a bystander NV pathway connecting to the slow pathway, and (C) slow‐fast AVNRT with a bystander NV pathway connecting to the fast pathway. (D) Schematic diagrams of orthodromic reciprocating tachycardia via the His‐ventricular pathway (HV‐ORT), upper septal type of idiopathic left ventricular tachycardia (ILVT), and bundle branch reentry. PVC, premature ventricular contraction; PPI, postpacing interval; TCL, tachycardia cycle length. Other abbreviations are as in Figure 2.