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A total of 438 consecutive patients who underwent the ergonovine provocation test for the diagnosis of vasospastic angina (VSA) were enrolled. Patients with VSA (n\u2009=\u200952) had a significantly greater coronary response to ergonovine (\u2212\u00a084.3\u2009\u00b1\u200910.5% vs. \u2212\u00a038.4\u2009\u00b1\u200917.9%, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and NID (26.3\u2009\u00b1\u200931.0% vs. 12.5\u2009\u00b1\u200919.0%, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) than non-VSA patients. However, positive NID (more than 13.8% dilation, n\u2009=\u2009170) showed a poor accuracy (AUC 0.64 [95% CI: 0.56\u20130.73], <jats:italic>p<\/jats:italic>\u2009=\u20090.001, sensitivity 60.4%, specificity 61.3%) for the diagnosis of VSA by ergonovine provocation test. Major adverse cardiovascular events (MACE) occurred more frequently in the VSA group than in the non-VSA group (9.6% vs. 2.2%, <jats:italic>p<\/jats:italic>\u2009=\u20090.006). In addition, the positive NID group showed a lower rate of MACE than the negative NID group (1.2% vs. 4.3%, <jats:italic>p<\/jats:italic>\u2009=\u20090.021). Interestingly, the group of VSA with negative NID had poor prognosis than any other combinations (Log-rank, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). Although NID had a limited role in the detection of VSA defined by ergonovine provocation test, NID combined with the ergonovine provocation test has an additive prognostic role in the clinical outcomes in patients with suspected VSA.<\/jats:p>","DOI":"10.1038\/s41598-021-03338-0","type":"journal-article","created":{"date-parts":[[2021,12,13]],"date-time":"2021-12-13T11:04:31Z","timestamp":1639393471000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Diagnostic and prognostic role of nitroglycerin-induced dilation in patients with suspected vasospastic angina, combined with ergonovine provocation test"],"prefix":"10.1038","volume":"11","author":[{"given":"Minsu","family":"Kim","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Albert Youngwoo","family":"Jang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pyung Chun","family":"Oh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Soon Yong","family":"Suh","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kyounghoon","family":"Lee","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Woong Chol","family":"Kang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taehoon","family":"Ahn","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seung Hwan","family":"Han","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2021,12,13]]},"reference":[{"key":"3338_CR1","doi-asserted-by":"publisher","first-page":"289","DOI":"10.1253\/circj.CJ-15-1202","volume":"80","author":"JF Beltrame","year":"2016","unstructured":"Beltrame, J. 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