Improvement after revascularization in hibernating myocardium

The left ventricular (LV) ejection fraction before (pre-op) and eight weeks after coronary artery bypass surgery in patients with more than seven (group A) or seven or fewer viable segments (group B). A significant increase in LV ejection fraction was observed in patients in group A who had substantial viability before surgery. The analysis was based on a total of 15 segments.