Postoperative atrial fibrillation after coronary artery bypass grafting will be monitored up to 1 year after the procedure by implanting a Reveal XT internal loop recorder two weeks before the surgery. Frequency, burden, and possible risk factors will be described. During the operation direct contact epicardial mapping will be performed and tissue samples will be collected to identify an electrophysiological and a structural substrate for development of AF.
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atrial fibrillation (AF)
Timeframe: 3 months