Key result
Pulsed field ablation successfully isolates persistent left superior vena cava after failed radiofrequency ablations.
Why the study?
Persistent left superior vena cava (PLSVC) can serve as an arrhythmogenic source of AF, and while catheter ablation is effective in selected patients, electrical isolation of the PLSVC remains technically challenging due to complex anatomy, multiple electrical connections, and proximity to vulnerable structures.
Case Report
Answers are grounded in this paper and cite their sources.
May support targeted PLSVC ablation in select AF cases; leaves open optimal techniques and need for larger studies.
Persistent left superior vena cava (PLSVC) is the most common thoracic venous anomaly 1 and can serve as an arrhythmogenic source of atrial fibrillation (AF) through muscular connections with the coronary sinus and left atrium (LA) 2. Catheter ablation targeting these connections has been reported as an effective strategy in selected patients. However, electrical isolation of the PLSVC remains technically challenging because of its complex anatomy, multiple electrical connections, and close proximity to adjacent vulnerable structures 3.
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Takahashi et al. (2026) conducted a case report in Arrhythmogenic persistent left superior vena cava with atrial fibrillation. Pulsed field ablation was evaluated on Electrical isolation of the persistent left superior vena cava. Pulsed field ablation was described as a salvage strategy to isolate an arrhythmogenic persistent left superior vena cava after multiple radiofrequency ablations (no quantitative data in abstract).
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