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We suspected an extracardiac shunt, so pulmonary angiograms were performed that revealed the presence of a left pulmonary arteriovenous malformation (PAVM). A Konar-MF Occluder was used to occlude the PAVM, with a satisfactory result. At 6\u2009months follow-up, the patient had normal peripheral oxygen saturation and a new pulmonary angiogram showed no residual shunt. Intrapulmonary shunts are a rare and under-recognised cause of paradoxical emboli in young patients; physicians should be aware of this diagnosis as percutaneous occlusion is indicated and critical to avoid recurrent ischaemic episodes.<\/jats:p>","DOI":"10.1136\/bcr-2021-247877","type":"journal-article","created":{"date-parts":[[2022,3,8]],"date-time":"2022-03-08T11:46:11Z","timestamp":1646739971000},"page":"e247877","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":1,"title":["Intracardiac versus extracardiac shunt in a young man with ischaemic stroke"],"prefix":"10.1136","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4491-5312","authenticated-orcid":false,"given":"Mafalda","family":"Carrington","sequence":"first","affiliation":[{"name":"Cardiology, Hospital do Espirito Santo EPE, \u00c9vora, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ana 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