{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T07:10:20Z","timestamp":1756278620154,"version":"3.44.0"},"reference-count":8,"publisher":"BMJ","issue":"1","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Case Rep"],"accepted":{"date-parts":[[2024,11,20]]},"published-print":{"date-parts":[[2025,1]]},"abstract":"<jats:p>A term, healthy infant presented with respiratory distress and severe pulmonary hypertension (PH). With an unclear aetiology and the intent to decrease right ventricular afterload, pulmonary vasodilators were initiated. Follow-up imaging revealed a supravalvular mitral ring as the cause of the PH which resolved after surgical resection of the membrane. Supravalvular mitral ring is a rare left-side congenital heart disease lesion that can lead to PH usually between infancy and toddler years, but can be easily missed in the setting of a concurrent large atrial septal defect that masks the gradient across the left ventricular inflow. While bronchopulmonary dysplasia is the most common cause of PH in infancy, a thorough evaluation is critical for the diagnosis of this reversible cause of PH as a missed diagnosis may redirect care with pulmonary vasodilators in the acute setting and potentially worsen the clinical status.<\/jats:p>","DOI":"10.1136\/bcr-2024-263731","type":"journal-article","created":{"date-parts":[[2025,1,3]],"date-time":"2025-01-03T01:30:34Z","timestamp":1735867834000},"page":"e263731","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Pulmonary hypertension in infancy: a reversible cause"],"prefix":"10.1136","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-2766-5333","authenticated-orcid":false,"given":"Cassandra","family":"Campbell","sequence":"first","affiliation":[{"name":"Pediatrics, The University of Tennessee Health Science Center, Memphis, Tennessee, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kawaljeet","family":"Singh","sequence":"additional","affiliation":[{"name":"Pediatrics, The University of Tennessee Health Science Center, Memphis, Tennessee, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark","family":"Weems","sequence":"additional","affiliation":[{"name":"Pediatrics, The University of Tennessee Health Science Center, Memphis, Tennessee, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ranjit","family":"Philip","sequence":"additional","affiliation":[{"name":"Pediatrics, The University of Tennessee Health Science Center, Memphis, Tennessee, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2025,1,2]]},"reference":[{"key":"2025082623441117000_18.1.e263731.1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccl.2016.04.001"},{"key":"2025082623441117000_18.1.e263731.2","unstructured":"Mychaskiw G , Sachdev V , Braden DA , et al . Supramitral ring: an unusual cause of congenital mitral stenosis. Case series and review. J Cardiovasc Surg (Torino) 2014;43."},{"key":"2025082623441117000_18.1.e263731.3","doi-asserted-by":"crossref","first-page":"541","DOI":"10.1016\/j.echo.2015.01.013","article-title":"Echocardiographic characteristics of annulo-leaflet mitral ring","volume":"28","author":"Schidlow","year":"2015","journal-title":"J Am Soc Echocardiogr"},{"key":"2025082623441117000_18.1.e263731.4","doi-asserted-by":"crossref","DOI":"10.1186\/1476-7120-3-19","article-title":"Mitral supravalvular ring: a case report","volume":"3","author":"Serra","year":"2005","journal-title":"Cardiovasc Ultrasound"},{"key":"2025082623441117000_18.1.e263731.5","first-page":"e19","article-title":"Cor triatriatum: a multimodality imaging approach","volume":"24","author":"Malik","year":"2008","journal-title":"Can J Cardiol"},{"key":"2025082623441117000_18.1.e263731.6","unstructured":"Baharestani B , Sadat Afjehi R , Givtaj N , et al . Supravalvar mitral ring: a case report. J Tehran Heart Cent 2017;7. 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