To the Editor —The Role of Atrioventricular Delay in Determining Right Ventricular Function with Left Bundle Pacing

We read with great interest the article by Tian et  al1 on the effects with left bundle branch pacing (LBBP) on right ventricular (RV) function. The authors are to be congratulated on their study, which adds to our understanding of LBBP. However, the authors did not report whether atrioventricular delay (AVD) was optimized for each patient. This is a key detail for interpreting these results. Previous experimental2 and simulation3 studies have shown that the effect of LBBP on RV activation is highly dependent on AVD, with AVD optimization allowing fusion between intrinsic RV and left ventricular (LV) paced activation, reducing the right bundl e branch block pattern induced by LBBP alone.

Source: Heart Rhythm - February 19, 2024 Category: Cardiology Authors: Marina Strocchi, Steven A. Niederer, Christopher A. Rinaldi Tags: Letters to the Editor Source Type: research