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A 63-year-old woman has been known to have angina pectoris due to coronary artery (CA) spasm. An intra-left CA infusion of acetylcholine (ACh) provoked spasms of the left CA and an anginal attack. After daily oral administration of nifedipine (NIF) for 2 weeks, intra-CA re-infusion study of ACh did not provoke any CA spasms. This is the first report to demonstrate the complete prevention of ACh-induced CA spasm with nifedipine.

Complete prevention of acetylcholine induced coronary artery spasm with nifedipine.