Between dismissal and 1 year there were 9 deaths ( 3.7 % ) ( Epic : 3.7 % , Magna : 5.0 % , and Mitroflow : 2.3 % ; P = .654 ) , 6 episodes of heart failure ( 2.5 % ) ( Epic :1.3 % , Magna : 1.3 % , and Mitroflow : 5.8 % ; P = .265 ) , 27 instances of atrial fibrillation/flutter ( 11.2 % ) ( Epic : 8.1 % , Magna : 11.0 % , and Mitroflow : 7.9 % ; P = .577 ) and no strokes/transient ischemic attacks .