because an increase in coronary vascular resistance in response to ergonovine maleate has been suggested as a possible diagnostic aid for variant angina , changes were evaluated in coronary hemodynamics and serial myocardial thallium-201 perfusion scans in 15 patients without angina and with normal coronary arteries in response to ergonovine ( 0.05 , 0.10 and 0.20 mg intravenously ) .
C0059514
ergonovine
C0002963
variant angina