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. 2017 Mar 27;4(1):e000593. doi: 10.1136/openhrt-2017-000593

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Cumulative freedom from AF without antiarrhythmic drug after a single procedure in study groups. Group 1: pulmonary vein isolation with interpulmonary isthmus ablation. Group 2: pulmonary vein isolation. AF, atrial fibrillation.