Intravenous metoprolol versus biatrial pacing in the prevention of atrial fibrillation after coronary artery bypass surgery: a prospective randomized open trial.

Background And Aims: Atrial fibrillation (AF) is the most common arrhythmia after coronary artery bypass surgery (CABG). Intravenous metoprolol and biatrial pacing have been reported to be effective in AF prophylaxis after cardiac surgery. The purpose of this trial was to compare the efficacy of intravenous metoprolol versus biatrial pacing combined with oral metoprolol in the prevention of AF after CABG.