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Figure 3 Plot demonstrating no difference in baseline TR between normal (white bars) and ischemic (black bars) segments, a longer TR at peak stress and a smaller difference between peak and baseline TR in ischemic segments compared with normal segments (left). The percent change in TR (peak vs. baseline) normalized to baseline TR was significantly higher in normal (30%) compared to ischemic (19%) segments (right). *p < 0.05. TR = time to onset of regional relaxation.