Atrial pacing‐induced paroxysmal atrioventricular block: Concealed conduction or phase 3 block or intrahisian reentry?

Termination, Advancement, and Delaying Responses to His Synchronous Premature Ventricular Contractions During Narrow QRS Tachycardia: What Are the Possible Mechanisms?

“…The partial penetration of an impulse into the AV node after a PVC might infer the behavior of the subsequent sinus impulse that is conducted through the AV node (Figures 2A and 2B) for ease of initiation of AV nodedependent tachycardias. 7,8 Adenosine-induced termination of this tachycardia, with an A-wave followed by A-H block, eliminated the diagnosis of AT (Figure 2C). 4 An Hr-PVC in Figure 3 stopped the tachycardia without retrograde conduction to the atrium, excluding the diagnosis of AT 3,9,10 and leaving us with the possibility of AVNRT with a bystander nodofasciular pathway.…”

Reply to Atrial pacing‐induced paroxysmal atrioventricular block: Concealed conduction or phase 3 block or intrahisian reentry?

“…I thank the authors for their letter to the editor and kind remarks pertaining to my recent review article for the journal . They have raised interesting points for discussion.…”