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. 2013 Mar 11;304(9):H1277–H1282. doi: 10.1152/ajpheart.00927.2012

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Fig. 5. — Effect of l-NMMA and SMTC on coronary artery diameter during incremental pacing. A and B: response to l-NMMA with coronary diameter plotted against heart rate and cardiac workload, respectively. C and D: response to SMTC with coronary diameter plotted against heart rate and cardiac workload, respectively. Data at baseline and peak pacing are shown. *P < 0.05 for comparison of coronary diameter at peak pacing vs. baseline; †P < 0.01 for significant interaction between groups by 2-way ANOVA; **P < 0.01. Bpm, beats/min.