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Figure 3 Suppression of early reinitiation of AF after RF ablation of a focus in the right superior pulmonary venous orifice (patient 5). (A) Before ablation, AF recurred consistently within 10 s after a 1.2-J transvenous atrial defibrillation shock. (B) After ablation, sinus rhythm remained after restoration of induced AF. Recording artifact occurred during switching from the defibrillation to the recording mode. Abbreviations as in Figure 1.