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. 2017 Mar 28;136(1):24–34. doi: 10.1161/CIRCULATIONAHA.116.025856

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© 2017 The Authors.

Circulation is published on behalf of the American Heart Association, Inc., by Wolters Kluwer Health, Inc. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution, and reproduction in any medium, provided that the original work is properly cited.

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Figure 6. — Diastolic coronary velocity–pressure gradient relation. Top, Two time points: 50% of peak exercise (t50) and peak exercise recordings in 1 individual. Bottom, Regression lines that arise from aggregating the k and S coefficients from recordings in all patients. Solid lines represent the control group; dashed lines, those who received nitroglycerin (GTN). Black line indicates baseline; blue, t50; red, peak; purple, 1 minute after peak; and green, 2 minutes after peak. *Statistically significant difference vs baseline of the k coefficient (Table 4 lists all the coefficients).