Key result
Single left bundle branch area defibrillation lead enables CRT-D in persistent left superior vena cava.
This case demonstrates the feasibility of implanting a single defibrillation lead in the left bundle branch area to achieve both electrical resynchronization and defibrillator function in the challenging anatomical setting of an isolated persistent left superior vena cava.
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May enable single-lead CRT-D in isolated PLSVC; hypothesis-generating and requires prospective confirmation before adoption.
Isolated persistent left superior vena cava • Left bundle branch area pacing • Cardiac resynchronization • Implantable cardioverter defibrillator • Sudden cardiac death prevention
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Steger et al. (2026) studied this question. A single left bundle branch area defibrillation lead facilitates cardiac resynchronization and defibrillator therapy in patients with isolated persistent left superior vena cava.
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