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Figure 4 Coronary angiograms of the left coronary artery in case 1. (A) A control coronary angiogram; (B) a coronary angiogram during the ST-segment elevation; (C) a coronary angiogram after a 0.5-mg intracoronary NTG infusion; (D) a coronary angiogram after a 10-mg intracoronary PVN infusion.