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Improvement on coronary angiography and electrocardiogram (ECG). (a) Coronary angiography revealed multiple coronary spasms. Twelve-lead ECG showed ST-segment elevation in inferior leads and in V2, V3, and V4 (arrow). (b) Coronary angiography demonstrated vasodilation of the coronary artery after intracoronary bolus injection of nitroglycerin. 12-lead ECG showed improvement of ST-segment elevation in those leads.
