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(a) Left coronary artery: diffuse coronary spasm involving proximal to distal of left anterior descending artery. (b) Right coronary artery: diffuse coronary spasm involving proximal to distal of right coronary artery, posterior descending artery, and posterior left ventricular branch. (c) Left coronary artery vasospasm resolved after intracoronary nitroglycerin. (d) Right coronary artery vasospasm resolved after intracoronary artery nitroglycerin.
