Compared with the placebo group , ejection fraction increased more in the amiodarone group at each time point ( 8.1 + / - 10.2 % [ mean + / - SD ] versus 2.6 + / - 7.9 % at 6 months , 8.0 + / - 10.9 % versus 2.7 + / - 8.0 % at 12 months , and 8.8 + / - 10.1 % versus 1.9 + / - 9.4 % after 24 months , all P < .001 ) .
