pain patterns can be identical , nitroglycerin can bring relief , interval electrocardiograms and exercise electrocardiograms generally disclose no abnormalities , coronary arteriograms may be within normal limits or nearly so , and , importantly , an ergonovine provocative test can provoke esophageal spasm accompanied by pain mistaken for prinzmetal 's angina .
C0017887
nitroglycerin
C0014863
esophageal spasm