{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T23:18:19Z","timestamp":1787008699252,"version":"build-2736575974"},"reference-count":10,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T00:00:00Z","timestamp":1770249600000},"content-version":"vor","delay-in-days":4,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,2,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Hypocalcaemic cardiomyopathy is a rare but reversible cause of dilated cardiomyopathy (DCM) and heart failure with reduced ejection fraction, commonly associated with post-operative hypoparathyroidism. Misdiagnosis as other forms of cardiomyopathy can delay appropriate treatment and worsen outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case summary<\/jats:title>\n                    <jats:p>A 36-year-old male presented with progressive dyspnoea, abdominal pain, and peripheral oedema. He had a history of invasive thyroid carcinoma treated with total thyroidectomy and radioactive iodine therapy, complicated by permanent hypoparathyroidism. Despite sustained alcohol abstinence, he was misdiagnosed with alcoholic cardiomyopathy and experienced recurrent hospitalizations for heart failure despite guideline-directed medical therapy (GDMT). Evaluation revealed severe hypocalcaemia, prolonged QTc (557\u2005ms), and echocardiographic findings of DCM with a left ventricular ejection fraction (LVEF) of 28%. Hypocalcaemic cardiomyopathy secondary to post-thyroidectomy hypoparathyroidism was diagnosed. Calcium and calcitriol supplementation, combined with GDMT, led to significant improvement. At 10 months, the patient\u2019s LVEF improved to 52%, QTc normalized to 397\u2005ms, and symptoms resolved completely. He was transitioned to endocrinology for long-term management.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>Hypocalcaemic cardiomyopathy should be suspected in unexplained DCM with a history of hypoparathyroidism. Timely calcium testing and correction, along with GDMT, can reverse cardiac dysfunction and improve outcomes.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/ehjcr\/ytag099","type":"journal-article","created":{"date-parts":[[2026,2,3]],"date-time":"2026-02-03T12:37:30Z","timestamp":1770122250000},"source":"Crossref","is-referenced-by-count":1,"title":["Reversible hypocalcaemic cardiomyopathy following post-thyroidectomy hypoparathyroidism: a case report"],"prefix":"10.1093","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3494-2958","authenticated-orcid":false,"given":"Toan Quang","family":"Dang","sequence":"first","affiliation":[{"name":"Department of Cardiology, Cardiovascular Center, Cho Ray Hospital , No. 201B, Nguyen Chi Thanh Street, Cho Lon Ward, Ho Chi Minh City 700000 ,","place":["Vietnam"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3984-648X","authenticated-orcid":false,"given":"Sy","family":"Van Hoang","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Cardiovascular Center, Cho Ray Hospital , No. 201B, Nguyen Chi Thanh Street, Cho Lon Ward, Ho Chi Minh City 700000 ,","place":["Vietnam"]},{"name":"Department of Internal Medicine, School of Medicine, University of Medicine and Pharmacy at \u00a0 Ho Chi Minh City, No. 217, Hong Bang Street, Cho Lon Ward, Ho Chi Minh City 700000, Vietnam"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chieu","family":"Van Ly","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Cardiovascular Center, Cho Ray Hospital , No. 201B, Nguyen Chi Thanh Street, Cho Lon Ward, Ho Chi Minh City 700000 ,","place":["Vietnam"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-3289-1946","authenticated-orcid":false,"given":"Thuc Tri","family":"Nguyen","sequence":"additional","affiliation":[{"name":"Department of Cardiology, Cardiovascular Center, Cho Ray Hospital , No. 201B, Nguyen Chi Thanh Street, Cho Lon Ward, Ho Chi Minh City 700000 ,","place":["Vietnam"]},{"name":"Ministry of Health of Vietnam , No. 138A, Giang Vo Street, Giang Vo Ward, Hanoi 100000 ,","place":["Vietnam"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,2,4]]},"reference":[{"key":"2026021807270226000_ytag099-B1","doi-asserted-by":"crossref","first-page":"187","DOI":"10.1016\/j.jacc.2022.08.812","article-title":"Nutritional heart disease and cardiomyopathies: JACC focus seminar 4\/4","volume":"81","author":"Sliwa","year":"2023","journal-title":"J Am Coll Cardiol"},{"key":"2026021807270226000_ytag099-B2","doi-asserted-by":"crossref","first-page":"1291","DOI":"10.1002\/ehf2.12693","article-title":"Hypocalcaemic cardiomyopathy: a description of two cases and a literature review","volume":"7","author":"V\u00e1lek","year":"2020","journal-title":"ESC Heart 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