Abstract
Left bundle branch (LBB) pacing was first reported by Huang et al in 2017 and following studies demonstrated that LBB pacing could provide favorable left ventricular (LV) electrical and mechanical synchrony. However, the mechanism of LV activation during LBB pacing is not fully understood. This study aimed to elucidate the detailed LV endocardial activation during LBB pacing in a swine model using an ultra-high density electroanatomic mapping system.
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