Deep Septal Pacing for Pacemaker-Induced Cardiomyopathy

Right ventricular (RV) pacing can impair left ventricular function and cause heart failure, known as pacing-induced cardiomyopathy (PICM). Upgrade to cardiac resynchronization (CRT) is its usual treatment; recently left bundle branch area pacing (LBBAP) has emerged as a potential alternative. Deep s...

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Published in:Pacing and clinical electrophysiology 2024-12
Main Authors: Mercé, Jordi, Anguera, Ignasi, Rodríguez, Marcos, Faga, Valentina, Rodríguez, Julián, Dallaglio, Paolo D, Antonio, Rodolfo San, Marco, Andrea Di
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container_title Pacing and clinical electrophysiology
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creator Mercé, Jordi
Anguera, Ignasi
Rodríguez, Marcos
Faga, Valentina
Rodríguez, Julián
Dallaglio, Paolo D
Antonio, Rodolfo San
Marco, Andrea Di
description Right ventricular (RV) pacing can impair left ventricular function and cause heart failure, known as pacing-induced cardiomyopathy (PICM). Upgrade to cardiac resynchronization (CRT) is its usual treatment; recently left bundle branch area pacing (LBBAP) has emerged as a potential alternative. Deep septal pacing (DSP), a simplified alternative to LBBAP, is still able to achieve narrower paced QRS than during conventional RV pacing. The aim of this study was to assess the effect of DSP in a cohort of patients with PICM. Consecutive patients diagnosed with PICM were included. The aim was to upgrade patients to DSP. The procedure was considered successful if a paced QRS duration ≤140 ms was obtained, in the absence of a terminal R wave in V1. Twelve patients were included. The mean baseline LVEF was 33% (SD 4%), and the mean percentage of RV pacing was 99% (SD 1%). All patients had symptomatic heart failure. The mean paced QRS duration was 172 ms (SD 14 ms) with RV pacing, and 130 ms (SD 7 ms) with DSP (mean difference 42 ms, p 
doi_str_mv 10.1111/pace.15135
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Upgrade to cardiac resynchronization (CRT) is its usual treatment; recently left bundle branch area pacing (LBBAP) has emerged as a potential alternative. Deep septal pacing (DSP), a simplified alternative to LBBAP, is still able to achieve narrower paced QRS than during conventional RV pacing. The aim of this study was to assess the effect of DSP in a cohort of patients with PICM. Consecutive patients diagnosed with PICM were included. The aim was to upgrade patients to DSP. The procedure was considered successful if a paced QRS duration ≤140 ms was obtained, in the absence of a terminal R wave in V1. Twelve patients were included. The mean baseline LVEF was 33% (SD 4%), and the mean percentage of RV pacing was 99% (SD 1%). All patients had symptomatic heart failure. The mean paced QRS duration was 172 ms (SD 14 ms) with RV pacing, and 130 ms (SD 7 ms) with DSP (mean difference 42 ms, p &lt; 0.001). At 6 months, the mean LVEF after the upgrade was 46% (SD 9%), significantly superior to LVEF with RV pacing (p = 0.001), a mean improvement of 13% (SD 10%). All patients except one experienced an improvement in LVEF of at least 5%. Our data suggest that DSP may be an effective and simpler alternative to biventricular or LBBAP in patients with PICM. 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