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Coronary angiography of the patient. Angiography of right coronary artery (RCA) at left anterior oblique (LAO) view revealed no stenosis or occlusion without intracoronary administration of nitroglycerin (A). Angiography of RCA after intracoronary administration of nitroglycerin revealed no stenosis and marked dilatation compared with control angiography at LAO (B) and at LAO cranial view (C).
