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  • Title: [A case of painless myocardial injury probably caused by coronary artery spasm].
    Author: Satoh F, Horimoto M, Hirokawa J, Igarashi K, Takenaka T, Fujiwara M, Igarashi T.
    Journal: Kokyu To Junkan; 1992 Oct; 40(10):1007-11. PubMed ID: 1439252.
    Abstract:
    A 53-year-old male was admitted to the hospital due to electrocardiographic ST-segment elevation in V1-4 with ST-segment depression in the inferior leads, which suggested acute myocardial infarction. He had a cough and a slight fever without chest pain. Serum creatine kinase and its myocardial band were slightly elevated but creatine kinase value did not exceed twice the normal upper limit. Emergent coronary arteriography (CAG) revealed intact coronary arteries. The CAG in a chronic stage again revealed intact coronary arteries. Intracoronary administration of acetylcholine of 100 micrograms to the left coronary artery and 50 micrograms to the right coronary artery provoked diffuse spasm in the right and left coronary arteries. The electrocardiogram (ECG) during the right coronary artery spasm revealed ST-segment depression in the inferior leads with ST-segment elevation in V2 and V3, which resembled the ECG finding at the time of the patient's admission. With intracoronary isosorbide dinitrate, the spasm and ST-segment elevation were resolved. These findings strongly suggest that coronary spasm can cause myocardial injury indicated by a slight elevation of serum creatine kinase value.
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