Key result
Abstract omits quantitative three-year clinical impacts of new LBBB post-TAVR.
Why the study?
The clinical impacts of new-onset left bundle branch block after transcatheter aortic valve replacement remain controversial, and the effect of LBBB resolution on outcomes is unclear.
New LBBB after TAVR often resolves spontaneously; leaves open whether timing of resolution affects pacing needs or outcomes.
Left bundle branch block (LBBB) is the most common conduction disorder after transcatheter aortic valve replacement (TAVR).1 Despite large amount of follow-up data, the clinical impacts of new-onset LBBB after TAVR remain controversial.2–5 In most studies to date, new-onset LBBB after TAVR was defined as LBBB present during hospitalization or persisting until discharge at longest. However, a substantial proportion of newly-developed LBBB after TAVR can spontaneously resolve within a short time1; therefore, the true impact of new-onset LBBB might be underestimated.
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Sasaki et al. (2023) studied Left bundle branch block after transcatheter aortic valve replacement. Newly-developed left bundle branch block vs. Absence or resolution of left bundle branch block was evaluated.
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