'Angina' and normal coronary arteriograms: a follow-up study.
D000787:Angina Pectoris / Q000175:diagnosis* / Q000000981:diagnostic imaging; D017023:Coronary Angiography; D003329:Coronary Vasospasm / Q000175:diagnosis; D003937:Diagnosis, Differential; D004562:Electrocardiography; D004874:Ergonovine; D004931:Esophageal Achalasia / Q000175:diagnosis; D005500:Follow-Up Studies; D006801:Humans; D008365:Manometry; D011795:Surveys and Questionnaires
D004874:Ergonovine