{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T19:31:41Z","timestamp":1791401501426,"version":"4.3.3"},"reference-count":43,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2026,7,21]],"date-time":"2026-07-21T00:00:00Z","timestamp":1784592000000},"content-version":"vor","delay-in-days":20,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001030","name":"Netherlands Heart Foundation","doi-asserted-by":"publisher","award":["CVON2014\u201309"],"award-info":[{"award-number":["CVON2014\u201309"]}],"id":[{"id":"10.13039\/501100001030","id-type":"DOI","asserted-by":"publisher"}]},{"name":"RACE V Reappraisal of Atrial Fibrillation","award":["01\u2013002-2022-0118"],"award-info":[{"award-number":["01\u2013002-2022-0118"]}]},{"name":"EmbRACE"},{"DOI":"10.13039\/501100000780","name":"European Union","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000780","id-type":"DOI","asserted-by":"publisher"}]},{"name":"CATCH ME","award":["633196"],"award-info":[{"award-number":["633196"]}]},{"name":"MAESTRIA","award":["965286"],"award-info":[{"award-number":["965286"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,7,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background and Aims<\/jats:title>\n                    <jats:p>Atrial cardiomyopathy (AtCM) is associated with atrial fibrillation (AF). While histological studies describe underlying mechanisms of AtCM, these insights remain disconnected from clinical AtCM. This study determines the histological basis of non-invasive AtCM markers and assess their prognostic value in patients undergoing cardiac surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods and results<\/jats:title>\n                    <jats:p>Left and right (LA\/RA) atrial tissue samples were obtained in patients undergoing cardiac surgery (n = 136) in the RACE V Tissue Bank study. Pre-operative rhythm history, digital ECG, transthoracic echocardiography (TTE) and biomarker levels were used to group patients in AtCM stages: AF: history of paroxysmal, persistent or permanent AF, Severe (LAVi&amp;gt;50 mL\/m2 or LAEF&amp;lt;35%), Moderate (LAVi 34\u201350 mL\/m2, or LAEF 35\u201350% AND NT-proBNP &amp;gt;250 pg\/mL), Mild (no AF, LAVi\u226434 mL\/m2 AND P-terminal Force V1 &amp;gt; 5 mV*ms OR P wave duration &amp;gt; 120 ms), and no AtCM. Tissue was stained (WGA\/CD31\/Vimentin) to quantify fibrosis, fibroblast density, myocyte diameter and vascularization. Post-operative rhythm was monitored continuously (2.5 years) using implantable loop recorders. Patients with severe AtCM had extended endomysial fibrosis (LA: +0.82\u00b5m, pFDR,LA &amp;lt; 0.001; RA: +0.64\u00b5m, pFDR,RA = 0.010) and larger left atrial cardiomyocytes (LA: +0.92\u00b5m, pFDR,LA = 0.026). Moderate AtCM patients showed LA myocyte hypertrophy (LA: +1.35\u00b5m, pFDR,LA = 0.007). Mild AtCM patients had similar histological features to patients without AtCM. Moderate (\u03b2 = 3.56, pFDR = 0.045) and severe (\u03b2 = 3.74, pFDR = 0.034) AtCM patients had a higher AF burden late after cardiac surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Clinical AtCM markers reflect pro-fibrotic and pro-hypertrophic remodelling in the moderate to severe AtCM stages and are associated with a higher AF burden late after surgery.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/europace\/euag146","type":"journal-article","created":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T11:42:09Z","timestamp":1784288529000},"source":"Crossref","is-referenced-by-count":1,"title":["Histological evaluation of clinically defined atrial cardiomyopathy stages and their association with atrial fibrillation burden under continuous monitoring for a 2.5-year follow-up"],"prefix":"10.1093","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4945-3946","authenticated-orcid":false,"given":"Joris","family":"Winters","sequence":"first","affiliation":[{"name":"Department of Physiology, Cardiovascular Research Institute Maastricht, University Maastricht , Maastricht ,","place":["the Netherlands"]},{"name":"Department of Cardiology, Leiden University Medical Center , Leiden ,","place":["the Netherlands"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2628-9562","authenticated-orcid":false,"given":"Michal","family":"Kawczynski","sequence":"additional","affiliation":[{"name":"Department of Physiology, Cardiovascular Research Institute Maastricht, University Maastricht , Maastricht ,","place":["the Netherlands"]},{"name":"Department of Cardiothoracic Surgery, Maastricht University Medical Centre+ , PO Box 616, Maastricht 6200 MD ,","place":["the 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