EXERCISE-INDUCED ST SEGMENT ELEVATION IN A PATIENT WITH NORMAL CORONARY-ARTERIES

In a 60-year-old man with exercise-dependent anginal symptoms, reversible ST segment elevations of maximally 0.8 mV occurred in the anterior chest leads during ergometric exercise at 75 W. Angiography excluded coronary artery stenoses. To demonstrate whether he had exercise-dependent vasospastic angina, angiography was performed during bicycle ergometry. At 75 W the typical symptoms recurred, accompanied by ST elevations in the ECG. At the same time, spasm in the region of the anterior interventricular branch was demonstrated angiographically; it disappeared at once after intracoronary injection of 200-mu-g nitroglycerin. The patient subsequently remained free of symptoms while taking isosorbide dinitrate (120 mg daily) and nifedipine (80 mg daily).