Unmasking of infra-Hisian conduction abnormality by intravenous isoproterenol during electrophysiology study for syncope.

Abstract

Recurrent unexplained syncope in the background of bundle branch block (BBB) often requires a pacemaker. But the decision-making for pacemaker is difficult in case of single episode of syncope with intermittent bundle branch block. We encountered one such case with intermittent LBBB, where the results of invasive EP study were even normal, until intravenous isoproterenol unmasked the infra-Hisian disease during decremental atrial pacing.

• Authors: Debabrata Bera, Debdatta Majumdar, Sanjeev S Mukherjee, Suchit Majumder, Sanjeev Kathuria
• Journal: Journal of arrhythmia (J Arrhythm) Vol. 38 Issue 1 Pg. 166-170 (Feb 2022) ISSN: 1880-4276 [Print] Japan
• PMID: 35222766 (Publication Type: Journal Article)
• Copyright: © 2021 The Authors. Journal of Arrhythmia published by John Wiley & Sons Australia, Ltd on behalf of the Japanese Heart Rhythm Society.