In this study, significant improvements were seen in left ventricular ejection fraction (LVEF). At 12 months, the LVEF increased from a median of 28.2% to 37.8% (difference, 9.4% [95% CI, 8.8 to 9.9%]). A significant 5.2% increase in LVEF was also seen as early as 6 months (5.2%, 95% CI, 4.8% to 5.6%).