Abstract
Postoperative atrial tachyarrhythmias (POATs) after coronary artery bypass grafting (CABG) are reported in 11% to 40% of patients. Several etiologic factors are mentioned. Prophylactic intervention with sotalol is reported to reduce the incidence of POAT. The authors studied the effect of magnesium chloride (MgCl2) in addition to sotalol in the prevention of POAT. Prospective, randomized, double-blinded, placebo-controlled trial. Single center. After institutional approval and written informed consent, patients undergoing CABG with use of cardiopulmonary bypass were included in a prospective, randomized, placebo-controlled double-blind study. In 74 patients, intravenous MgCl2, 50 mmol/24 hours, was continuously administered after the induction of anesthesia during 36 hours; 73 patients received placebo. In both groups, sotalol orally was started 16 to 24 hours after CABG. The incidence and duration of in-hospital POAT were evaluated. A total of 147 patients could be evaluated: in the magnesium-treated group (n = 74), 25 patients developed POAT (34%) and in the placebo group (n = 73) 19 patients (26%) (p = 0.36). There was no statistically significant difference in duration of POAT between the groups. In the magnesium-treated gr...Continue Reading
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