2:1 electronic AV block due to inappropriate automatic post ‐ventricular atrial refractory period extension

AbstractA 16-year-old female with dual-chamber pacemaker (Medtronic Azure XT DR), due to symptomatic third-degree congenital atrioventricular (AV) block, presented to our ambulatory with dizziness and presyncopal episodes preceded by prodromes, occurring over the last few months. The device was programmed in DDD mode with an upper rate of 150  bpm. A head-up Tilt Test (HUTT) revealed the unexpected emergence of 2:1 electronic AV block at a sinus rate of 130 bpm.

Source: Pacing and Clinical Electrophysiology : PACE - April 7, 2024 Category: Cardiology Authors: Pasquale Crea, Paolo Bellocchi, Federica Cocuzza, Antonino Micari, Lilia Oreto Tags: CASE REPORT Source Type: research