{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T23:18:22Z","timestamp":1790983102141,"version":"4.1.0"},"reference-count":8,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T00:00:00Z","timestamp":1788825600000},"content-version":"vor","delay-in-days":250,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Cardiology"],"published-print":{"date-parts":[[2026,1]]},"abstract":"\n Background<\/jats:title>\n Myocarditis has been rarely reported following COVID\u201019 vaccination, most commonly in younger males. Although a temporal association has been observed, establishing causality in individual cases remains challenging. Myocardial inflammation may involve the cardiac conduction system, rarely resulting in high\u2010grade atrioventricular (AV) block. Importantly, these conduction abnormalities may be transient and resolve as the underlying inflammation improves.<\/jats:p>\n <\/jats:sec>\n \n Case Summary<\/jats:title>\n We report a rare case of myocarditis following a COVID\u201019 vaccination in an elderly woman who experienced complete heart block and worsening exertional dyspnea subsequent to receiving a COVID\u201019 booster. Coronary angiography revealed patent coronary arteries, and magnetic resonance imaging confirmed the presence of myocarditis. Her conduction abnormality progressively resolved without the need for permanent pacing, and she was subsequently discharged in stable condition.<\/jats:p>\n <\/jats:sec>\n \n Discussion<\/jats:title>\n Myocarditis should be considered as a potentially reversible cause of high\u2010grade AV block. A thorough clinical history and multimodal imaging are essential for diagnosis, as early recognition and appropriate monitoring may allow recovery of AV conduction and avoid unnecessary permanent pacemaker implantation.<\/jats:p>\n <\/jats:sec>","DOI":"10.1155\/cric\/4549069","type":"journal-article","created":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T10:40:48Z","timestamp":1788864048000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["The Hidden Cost of Immunity: Myocarditis Presenting as Complete Heart Block in an Older Adult Following COVID\u201019 Booster"],"prefix":"10.1155","volume":"2026","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8121-083X","authenticated-orcid":false,"given":"Dhan Bahadur","family":"Shrestha","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ruvarashe","family":"Mupedziswa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0266-2732","authenticated-orcid":false,"given":"Daniel H.","family":"Katz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mustafain","family":"Meghani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,8]]},"reference":[{"key":"e_1_2_13_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/ejhf.2669"},{"key":"e_1_2_13_2_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamacardio.2021.2821"},{"key":"e_1_2_13_3_2","doi-asserted-by":"publisher","DOI":"10.1001\/jamacardio.2021.2828"},{"key":"e_1_2_13_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jccase.2023.01.004"},{"key":"e_1_2_13_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.amsu.2022.103694"},{"key":"e_1_2_13_6_2","doi-asserted-by":"publisher","DOI":"10.1161\/circresaha.122.321881"},{"key":"e_1_2_13_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/emp2.12723"},{"key":"e_1_2_13_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.rec.2022.10.004"}],"container-title":["Case Reports in Cardiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/cric\/4549069","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1155\/cric\/4549069","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/cric\/4549069","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T10:40:48Z","timestamp":1788864048000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1155\/cric\/4549069"}},"subtitle":[],"editor":[{"given":"Satabdi","family":"Datta Choudhury","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"editor"}]}],"short-title":[],"issued":{"date-parts":[[2026,1]]},"references-count":8,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1155\/cric\/4549069"],"URL":"https:\/\/doi.org\/10.1155\/cric\/4549069","archive":["Portico"],"relation":{},"ISSN":["2090-6404","2090-6412"],"issn-type":[{"value":"2090-6404","type":"print"},{"value":"2090-6412","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1]]},"assertion":[{"value":"2026-04-13","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-31","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-09-08","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"4549069"}}