to investigate the relation between basal coronary artery diameter and development of coronary artery spasm , the diameters of the proximal , middle and distal segments of the three major coronary artery branches , together with that of the left main trunk , were measured on a control angiogram and after ergonovine and nitrate administration in 30 patients with vasospastic angina without significant organic stenosis , and in 35 patients without ischemic heart disease .
C0014704
ergonovine
C0002963
vasospastic angina