{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T11:54:23Z","timestamp":1792410863109,"version":"4.4.0"},"reference-count":12,"publisher":"BMJ","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["BMJ Case Reports"],"abstract":"<jats:p>The Chiari network, a net-like structure within the right atrium, has been described as an embryonic remnant of no clinical significance. Its role in facilitating paradoxical arterial embolic events and as a potential site for thrombus formation however, has been reported in the literature. This case illustrates the protective filter-effect of the Chiari network in a 79-year-old Caucasian man with an unknown diagnosis of polycythaemia rubra vera who presented with clinical signs and symptoms of deep vein thrombosis. Transoesophageal echocardiogram confirmed entrapment of a thrombus within the Chiari network, which was not visualised following treatment on repeat scanning 1 month later. Here the authors describe how the Chiari network may have prevented the occurrence of a fatal massive pulmonary embolism in a patient with a high pro-thrombotic tendency, and review the current literature regarding the action of this anatomic variant as risk factor or protector.<\/jats:p>","DOI":"10.1136\/bcr.05.2011.4289","type":"journal-article","created":{"date-parts":[[2012,4,30]],"date-time":"2012-04-30T08:08:23Z","timestamp":1335773303000},"page":"bcr0520114289","source":"Crossref","is-referenced-by-count":11,"title":["Chiari network: a protective filter against pulmonary embolism in a case of polycythaemia"],"prefix":"10.1136","volume":"2012","author":[{"given":"Samya Gwen","family":"Obaji","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Cooper","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Somauroo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2012,4,30]]},"reference":[{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.1","doi-asserted-by":"publisher","DOI":"10.1007\/s00276-010-0639-z"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.2","unstructured":"Wiegers S Plappert T St John Sutton M . Echocardiography in Practice: a Case Oriented Approach [http:\/\/www.echo-web.com\/asp\/CaseStudiyChiari.asp] (accessed 27th March 2011)."},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.3","doi-asserted-by":"publisher","DOI":"10.1002\/ca.20195"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.4","doi-asserted-by":"publisher","DOI":"10.1016\/0735-1097(95)00144-O"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.5","first-page":"336","article-title":"Giant eustachian valve with echocardiographic appearance of divided right atrium","volume":"29","author":"Yavuz","year":"2002","journal-title":"Tex Heart Inst J"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.6","doi-asserted-by":"crossref","unstructured":"Yuen ST Dickens P . Sudden death from secondary massive pulmonary embolism derived from marrow emboli trapped by Chiari\u2019s network [abstract]. Forensic Sci Int 1992;52:211\u201314.","DOI":"10.1016\/0379-0738(92)90109-A"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.7","unstructured":"Motovska Z Widimsky P Bilkova D Penicka M Linkova H Kautznerova D Kolesar M Koldova L Kvasnicka J . An embolus in the right atrium caught in the Chiari network and resistant to thrombolysis. BMJ Case Reports. 2010. [http:\/\/casereports.bmj.com\/content\/2010\/bcr.09.2008.1019.full] (accessed 27th March 2011)."},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.8","doi-asserted-by":"publisher","DOI":"10.1016\/0003-4975(90)90161-X"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.9","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijcard.2007.07.116"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.10","first-page":"80","article-title":"A dancing thrombus in the right atrium going hand-in-hand with the electrocardiogram","volume":"9","author":"van Opstal","year":"2008","journal-title":"Eur J Echocardiogr"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.11","doi-asserted-by":"publisher","DOI":"10.1161\/CIRCULATIONAHA.105.592592"},{"key":"2025082623514196000_2012.apr28_1.bcr0520114289.12","unstructured":"Berk PD Wasserman LR Fruchtman SM Goldberg JD . Treatment of polycythemia vera: a summary of clinical trials conducted by the Polycythemia Vera study group. In: Wasserman LR Berk PD Berlin NI , eds. Polycythemia Vera and the Myeloproliferative Disorders. Philadelphia, PA: WB Saunders 1995:166\u201394."}],"container-title":["BMJ Case Reports"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/bcr.05.2011.4289","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,27]],"date-time":"2025-08-27T06:51:48Z","timestamp":1756277508000},"score":1,"resource":{"primary":{"URL":"https:\/\/casereports.bmj.com\/lookup\/doi\/10.1136\/bcr.05.2011.4289"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,4,30]]},"references-count":12,"alternative-id":["10.1136\/bcr.05.2011.4289"],"URL":"https:\/\/doi.org\/10.1136\/bcr.05.2011.4289","relation":{},"ISSN":["1757-790X"],"issn-type":[{"value":"1757-790X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,4,30]]}}}