Transient conduction block of the superior vena cava following pulsed field ablation of the right superior pulmonary vein

This case demonstrates that an immediate superior vena cava (SVC) conduction block may occur during pulsed field ablation (PFA) due to anatomical proximity, a positive tissue proximity index, and a narrow SVC diameter. However, lesions not directly influenced by PFA tend to regress and may be reversible, leading to SVC potential reconduction. CS, coronary sinus; d, distal; LAO, left oblique view; LL, left lateral; p, proximal; PA, posteroanterior view; RA, right atrial; RAO, right oblique view; RSPV, right superior pulmonary vein; RV, right ventricular; SUP, superior view.