Resting measures of myocardial oxygen demand between the three groups. The mean ± the standard error of the myocardial oxygen demand (Y-axis) and the number of participants in each of the 3 study groups (X-axis) are shown. The myocardial stroke work is denoted by the gray bars, and the pressure volume area is denoted by the black bars. At rest, Group II participants (wall motion negative, perfusion positive) have lower myocardial oxygen demand as assessed by myocardial stroke work (SW) than those in III (wall motion and perfusion positive) or Group I. Also, PVA is reduced in Groups II relative to Group I and trends toward a difference with Group III.