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Figure 2 The proportion of patients developing atrial fibrillation (AF) among all the patients, and among the subset of patients on beta-blockers using an intention-to-treat analysis. There was a trend toward a reduction in the incidence of AF among the patients on beta-blockers receiving biatrial pacing (BAP). The one patient who developed AF in the BAP group (asterisk) was never actually paced because of postoperative complications. The numbers above the bars indicate the absolute number of patients in each category. Hatched bars = no atrial pacing; black bars = right atrial pacing; white bars = BAP.
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