The efficacy of supplemental magnesium in reducing atrial fibrillation after coronary artery bypass grafting.

Background: Atrial fibrillation after coronary artery bypass is reported from 17% to 53%. Hypomagnesemia after this surgery is considered a contributing factor.

Methods: Two hundred-two coronary bypass patients were randomized to magnesium (n = 105) or placebo (n = 97).