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Figure 2 Representative images of the left coronary angiogram and the intravascular ultrasound (IVUS) in a patient with coronary spastic angina. (Top right) Intracoronary injection of acetylcholine (100 µg) induced subtotal occlusion of the left anterior descending and left circumflex coronary artery. (Bottom left) After administration of isosorbide dinitrate, the coronary arteries were dilated and no fixed stenosis was noted. Intravascular ultrasound image exhibited a thickened I + M area and this lesion existed eccentrically (the position of the ultrasound transducer is noted by the black arrow on the angiogram after administration of isosorbide dinitrate).
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