Abstract:Background: Although the interest in conduction system pacing is increasing, the data on longitudinal dissociation in the literature is still limited.
Methods and Results:We performed left bundle branch (LBB) pacing on a patient with sick sinus syndrome and atrioventricular block. The transition of QRS morphology can be observed during the threshold testing. The main findings were different left ventricular activation times when selective LBB capture was performed at different outputs. Conclusions: This phenom… Show more
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