Coronary artery spasm.
D002121:Calcium Channel Blockers / Q000627:therapeutic use; D003329:Coronary Vasospasm / Q000175:diagnosis* / Q000188:drug therapy; D004562:Electrocardiography; D004874:Ergonovine; D006801:Humans; D008297:Male; D008875:Middle Aged
D002121:Calcium Channel Blockers; D004874:Ergonovine