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Figure 1 .
Doppler flow velocity responses before, during, and following a bolus injection of acetylcholine (2 ml of 10-4 M) in the dominant circumflex coronary artery.
Figure 2 .
Coronary blood flow response to incremental substance P infusion (1 ml/min) administered via the guide catheter (open circles) or IVUS catheter (closed circles). n = 10 per group. One way analysis of variance (ANOVA) *p < 0.001; †p = not significant. Two way ANOVA *p < 0.001.