{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T09:13:08Z","timestamp":1776417188421,"version":"3.51.2"},"reference-count":6,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2026,3,24]],"date-time":"2026-03-24T00:00:00Z","timestamp":1774310400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Left atrial appendage aneurysm (LAAA) is an exceptionally rare cardiac abnormality that may be congenital or acquired. Although many patients remain asymptomatic for years, common presentations include palpitations, dyspnoea, and thromboembolic events.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case summary<\/jats:title>\n                    <jats:p>A 30-year-old woman with no medical history presented with 2 weeks of palpitations and exertional dyspnoea. Examination revealed mild congestion and an irregular rhythm. Electrocardiography showed atrial fibrillation with a slightly rapid ventricular response. Chest radiography demonstrated a prominent left mediastinal border. Transthoracic echocardiography identified a large congenital LAAA adjacent to a normal-sized left ventricle with moderately reduced ejection fraction. She improved with intravenous diuretics, anticoagulation, and guideline-directed medical therapy. Given her preference for conservative therapy, she was discharged on rivaroxaban. She remained asymptomatic during follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>LAAA should be suspected in patients with unexplained left-sided mediastinal enlargement and atypical echocardiographic findings. Imaging is essential for diagnosis, and surgical aneurysmectomy is considered curative, although evidence guiding management in asymptomatic individuals is limited. Selected patients may be managed conservatively with close follow-up.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/ehjcr\/ytag233","type":"journal-article","created":{"date-parts":[[2026,3,22]],"date-time":"2026-03-22T12:31:01Z","timestamp":1774182661000},"source":"Crossref","is-referenced-by-count":0,"title":["Congestive heart failure as the presenting form of a giant left atrial appendage aneurysm: a case report"],"prefix":"10.1093","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7933-8773","authenticated-orcid":false,"given":"Andrew Sefenu","family":"Dzebu","sequence":"first","affiliation":[{"name":"Cardiothoracic Centre, Ho Teaching Hospital, P.O. BOX MA 374, Ho-Denu Road, Trafalga, Ho, Volta Region VH-0080-7737 ,","place":["Ghana"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7150-7904","authenticated-orcid":false,"given":"Edward Bediako","family":"Mensah","sequence":"additional","affiliation":[{"name":"Department of Internal Medicine, Sunyani Teaching Hospital, P.O. BOX 27, Techiman-Wenchi Road, Sunyani BS-0027-8082 ,","place":["Ghana"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0497-1491","authenticated-orcid":false,"given":"Yiliam","family":"Blanco P\u00e9rez","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Hospital Hermanos Ameijeiras, San L\u00e1zaro 701, e\/ Belascoa\u00edn y Marqu\u00e9s Gonz\u00e1lez, Centro Habana, Havana 10300 ,","place":["Cuba"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5332-6579","authenticated-orcid":false,"given":"\u00c1ngela M","family":"Castro Arca","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Hospital Hermanos Ameijeiras, San L\u00e1zaro 701, e\/ Belascoa\u00edn y Marqu\u00e9s Gonz\u00e1lez, Centro Habana, Havana 10300 ,","place":["Cuba"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5860-8527","authenticated-orcid":false,"given":"Francisco L","family":"Moreno-Mart\u00ednez","sequence":"additional","affiliation":[{"name":"Cardiac Catheterization and Interventional Cardiology Unit, Hospital Virgen de la Pe\u00f1a de Fuerteventura, Carretera al Aeropuerto, Km 1, Puerto del Rosario, Las Palmas 35600, Espa\u00f1a"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2026,3,24]]},"reference":[{"key":"2026041704175216800_ytag233-B1","doi-asserted-by":"crossref","first-page":"633","DOI":"10.1186\/s12872-024-04323-x","article-title":"Left atrial appendage aneurysm: a descriptive systematic review of 177 cases","volume":"24","author":"Daralammouri","year":"2024","journal-title":"BMC Cardiovasc Disord"},{"key":"2026041704175216800_ytag233-B2","doi-asserted-by":"crossref","first-page":"703","DOI":"10.1016\/j.repc.2025.03.010","article-title":"Left atrial appendage aneurysm: an unexpected finding in a patient with asymptomatic atrial fibrillation","volume":"44","author":"Cantalapiedra Romero","year":"2025","journal-title":"Rev Port Cardiol"},{"key":"2026041704175216800_ytag233-B3","doi-asserted-by":"crossref","first-page":"2070","DOI":"10.3390\/diagnostics15162070","article-title":"Giant left atrial appendage aneurysm in a 6-year-old girl with a prothrombotic genetic predisposition: a case report and literature review","volume":"15","author":"Suciu","year":"2025","journal-title":"Diagnostics (Basel)"},{"key":"2026041704175216800_ytag233-B4","first-page":"e56280","article-title":"Left atrial appendage aneurysm: a case report and literature review","volume":"16","author":"Ayala Torres","year":"2024","journal-title":"Cureus"},{"key":"2026041704175216800_ytag233-B5","doi-asserted-by":"crossref","first-page":"1136","DOI":"10.1016\/j.radcr.2023.11.049","article-title":"Imaging reveals a fifth heart chamber: diagnosing and treating a massive left atrial appendage aneurysm","volume":"19","author":"Abuzahra","year":"2024","journal-title":"Radiol Case Rep"},{"key":"2026041704175216800_ytag233-B6","doi-asserted-by":"crossref","first-page":"ytae158","DOI":"10.1093\/ehjcr\/ytae158","article-title":"Left atrial appendage aneurysm with atrial fibrillation: a case report","volume":"8","author":"Zhang","year":"2024","journal-title":"Eur Heart J Case Rep"}],"container-title":["European Heart Journal - 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