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Figure 2 Scatter plots illustrating changes in LV indices as functions of the change during Exercise 1. (a) Change in regional EF between baseline and 15 min after Exercise 1. y-intercept –0.3 (–1.4 to 0.8); slope 0.4 (0.3 to 0.5); R = 0.50. (b) Change in regional EF between Exercise 1 and Exercise 2. Ischemic sectors (closed circles): y-intercept 1.1 (–2.0 to 4.1); slope –0.4 (–0.7 to –0.2); R = –0.42. Nonischemic sectors (open circles): y-intercept –1.1 (–3.2 to 1.1); slope 0.1 (–0.2 to 0.3); R = 0.01. (c) Change in global EF between baseline and 15 min after Exercise 1. y-intercept 0.5 (–0.9 to 2.0); slope 0.5 (0.2 to 0.7); R = 0.59. (d) Change in global EF between Exercise 1 and Exercise 2. y-intercept 0.7 (–0.6 to 2.0); slope –0.3 (–0.5 to –0.1); R = –0.54. EF = ejection fraction.