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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 2. — Supine exercise resistance protocol and ST-segment change. Top, Exercise performance summarized cycling resistance in Watts with patients cycling at 60 rpm, at baseline (Base), 50% of the time (t50) to peak exercise (peak) when patients experienced significant limiting symptoms, and continued exercise 1 and 2 minutes after peak. At time peak, half the patients had sublingual nitroglycerin (GTN) administered, and all patients continued to exercise for an extra 2 minutes at the same workload. Bottom, The mean surface ECG ST-segment deviation in millivolts. *Statistical significance, baseline vs peak exercise, P<0.05. ‡Significant difference, peak after nitroglycerin (GTN) vs control.