“…Magnesium sulfate was suggested by some authors to be efficacious in cardiac operations such as atrial fibrillation (AF), coronary artery bypass surgery and heart valve surgeries (Gu et al, 2012[53]; Lee et al, 2016[90]; Lip, 2016[93]; Mazurek and Lip, 2017[102]; Talkachova et al, 2016[150]; Treggiari-Venzi et al, 2000[154]). Low serum Mg level and older age have been reported as risk factors for AF (Treggiari-Venzi et al, 2000[154]).…”