Fig. 1From: Clinical significance and risk factors for new onset and recurring atrial fibrillation following cardiac surgery - a retrospective data analysisOverview of study population and subgroups for analysis. After excluding one patient who was a minor at the time of surgery, 999 patients were analysed in total. Subjects were allocated to 4 groups based on the pre- and postoperative occurrence of atrial fibrillation (AF)Back to article page