Females had ∼7 ms shorter R-wave peak times than males during LBB area pacing, suggesting sex-based cutoffs are needed to assess left bundle branch capture.
Do R-wave peak times used to identify left bundle branch capture during LBBAP differ between males and females?
R-wave peak times used to identify left bundle branch capture are shorter in females, suggesting the need for sex-specific cutoffs during LBBAP.
Absolute Event Rate: 0% vs 0%
Despite innate differences in QRS duration between males and females, no recommendations have been established to assess for left bundle branch (LBB) capture across different sexes in patients undergoing LBB area pacing (LBBAP). To this end, we performed a retrospective study analyzing postimplant ECGs from 222 patients (143 males/79 females). R-wave peak times (RWPTs), traditionally used to identify LBB capture, were noted to be ∼7 ms shorter in females vs. males, with the differences resolved when accounting for smaller size of female hearts despite no correlation between RWPT and body/heart size. These results argue towards establishing sex-based cutoffs for LBB capture.
Shadrin et al. (Wed,) reported a other. Females had ∼7 ms shorter R-wave peak times than males during LBB area pacing, suggesting sex-based cutoffs are needed to assess left bundle branch capture.
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