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Induction of atrial fibrillation (AF). (A) Image of programmed stimulation at high right atrial for induction of atrial fibrillation (post surgery). (B) AF induced by the 190 ms cycle stimulation before Cox-Maze IV. (C) After Cox-Maze IV, the 190 ms cycle stimulation failed to induce AF again. (D) After Cox-Maze IV, the 170 ms cycle stimulation could not induce AF; and (E) After Cox-Maze IV, the 150 ms cycle stimulation could not induce AF.
