Table 1.

Studies characteristics.

						Results (POAF)
Study	N	Study design	Control	Inclusion criteria	Exclusion criteria	PUFA	Control
Calo	160	Open-label, prospective, randomized, controlled trial with parallel groups; not blinded	No PUFA	Age >18, NSR, stable hemodynamic conditions before surgery	Concomitant valvular surgery, a prior history of any SVT, the current use of an AAD other than BB, CCB, or digitalis	15.2%	33.3%
Heidt	102	Prospective, randomized double-blinded trial	IV saturated free fatty acids	Age >18, NSR, stable hemodynamic conditions before surgery, no angina at rest	Concomitant valvular surgery, a prior history of any SVT, the current use of an AAD other than BB or CCB	17.3%	30.6%
Heidarsdottir	168	Prospective, randomized, double-blinded, placebo-controlled trial	Placebo	All of the consecutive patients scheduled for elective or open heart surgery	Age <40, prior history of any SVT, the current use of amiodarone or sotalol, an emergent operation	54.2%	54.1%
Saravanan	103	Prospective, randomized, double-blinded, placebo-controlled trial	Placebo	Age >18, scheduled to undergo elective isolated CABG	A prior history of any atrial arrhythmia, the current use of a class-1 or class-3 AAD, fish oil use within 3 mos prior to surgery	56%	43%

AAD, antiarrhythmic drugs; BB, beta-blockers; CABG, coronary artery bypass grafting; CCB, calcium channel blockers; IV, intravenous; NSR, normal sinus rhythm; POAF, postoperative atrial fibrillation; PUFA, polyunsaturated fatty acid; SVT, supraventricular tachycardia.