Key result
Selective LBBP links to marked stimulus-QRS latency and double QRS transitions from transient septal edema.
Why the study?
Accurate assessment of left bundle branch capture during left bundle branch area pacing is essential to maximize hemodynamic benefits, but it remains a practical challenge.
Case Report
Highlights the challenges and phenomena associated with assessing left bundle branch capture during LBBAP, specifically prolonged stimulus-to-QRS latency and transient septal edema.
Left bundle branch area pacing (LBBAP) has been increasingly adopted worldwide. Because its hemodynamic benefits are maximized by capture of conduction system in a hierarchical fashion, accurate assessment of left bundle branch (LBB) capture is essential; however, it remains a practical challenge.[1,2] Although contemporary LBBAP practice is primarily guided by expert consensus stepwise criteria,[3] LBB capture is sometimes assessed using isolated parameters such as the V6 R-wave peak time (V6RWPT), which may be inconclusive.
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Goto et al. (2026) conducted a case report in Transient septal edema during left bundle branch area pacing. Left bundle branch area pacing was evaluated. Selective left bundle branch pacing was associated with markedly prolonged stimulus-to-QRS latency and double QRS transitions linked to transient septal edema.
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