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Termination of AF to sinus rhythm by ablation that detaches AF rotor enabling its collision with nearby anatomic structures (mitral annulus or left inferior pulmonary vein orifice). (A) Intracardiac. (B) Clockwise rotor that precesses in a limited region of low left atrium before ablation; (C) Ablation de-stabilizes the rotor precession locus, causing AF to terminate to sinus rhythm. (D) Proximity of rotor to the mitral annulus, in particular, may have enabled rapid AF termination.
