Acute mitral block: pulse field ablation plus radiofrequency ablation when compared to radiofrequency ablation plus ethanol injection of vein of Marshall.

This retrospective study evaluated two groups: patients receiving RFA for PVI, posterior wall isolation, mitral isthmus, and coronary sinus (CS) ablation with adjunctive VOM ethanol injection (VOM/RFA ALL (N = 53)), and patients receiving PVI with PFA using pentaspline catheter followed by mitral isthmus and CS ablation with RFA (PFA PV + PW/RFA MITRAL (N = 12)). We hypothesized that PFA for pulmonary vein isolation (PVI) facilitates mitral block without adjunctive vein of Marshall (VOM) ethanol injection. Mitral block was achieved in 92.