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  • Title: Exercise-induced ST-segment elevation possibly caused by coronary artery spasm. A case presentation and review.
    Author: Przybojewski JZ, Thorpe L.
    Journal: S Afr Med J; 1985 Sep 14; 68(6):419-24. PubMed ID: 3875904.
    Abstract:
    A 36-year-old man with classic angina pectoris had marked ST-segment elevation (STE) in the inferior leads on stress-testing in the absence of chest pain. There was no evidence of previous myocardial infarction (MI). Selective coronary arteriography delineated severe obstructions in the right coronary artery (RCA) with additional left circumflex coronary artery (LCx) obstruction. Left ventricular cine-angiography established that there was normal contractility and confirmed the absence of past MI. Coronary artery bypass graft surgery to the RCA and LCx was unfortunately complicated by an acute transmural inferoposterolateral MI. Treadmill stress testing 6 weeks after surgery failed to demonstrate the preoperative ST-segment change. The patient may have developed exercise-induced coronary artery spasm superimposed on the severe proximal RCA stenosis; this in turn may have caused the inferior STE. Exercise-induced STE is reviewed.
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