RecruitingEarly Phase 1Combination productPrevention of Postoperative Atrial Fibrillation (POAF) Using Intra-Pericardial AmiodaroneThe purpose of this study is to evaluate the combination of CardiaMend, with the addition of amiodarone in the prevention of postoperative atrial fibrillation (POAF) in patients undergoing cardiac arterial bypass grafting (CABG) or valve surgery.