Response to spontaneous and induced His refractory ventricular premature beats during long RP tachycardia: What is the mechanism?

Saikiran Kakarla; Sreevilasam P Abhilash; Jyothi Vijay; Narayanan Namboodiri

doi:10.1002/joa3.12958

Response to spontaneous and induced His refractory ventricular premature beats during long RP tachycardia: What is the mechanism?

J Arrhythm. 2023 Nov 23;40(1):148-149. doi: 10.1002/joa3.12958. eCollection 2024 Feb.

Authors

Saikiran Kakarla¹, Sreevilasam P Abhilash¹, Jyothi Vijay¹, Narayanan Namboodiri¹

Affiliation

¹ Division of Cardiac Electrophysiology Sree Chitra Tirunal Institute for Medical Sciences and Technology Thiruvananthapuram India.

Abstract

This electrophysiology tracing demonstrates a graded postexcitation response of the retrograde limb of an orthodromic reentrant tachycardia circuit with varying His refractory VPB coupling intervals, which reiterates the decrementally conducting retrograde limb of the tachycardia circuit.

Keywords: His refractory VPB; long RP tachycardia; permanent junctional reciprocating tachycardia; postexcitation.