{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T19:37:32Z","timestamp":1786649852623,"version":"build-2736575974"},"reference-count":38,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","license":[{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-sa\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Vitamin D is a prohormone necessary for the optimal functioning of the locomotor and circulatory systems in humans. As a caveat, vitamin D metabolism is crucial for maintaining musculoskeletal and cardiovascular health for overexercising people, like athletes. Our study intended to explore the relationship between serum 25-hydroxy vitamin D (25(OH) D) levels and left ventricle\/right ventricle (LV\/RV) systolic and diastolic function in adolescent athletes using 2D Doppler studies.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>In our cross-sectional study, 100 adolescent athletes were divided into two groups: vitamin D insufficiency (25(OH)D&lt;20 ng\/mL) and vitamin D sufficiency (25(OH)D&gt;20 ng\/mL) with 30 males and 20 females in both groups. A detailed physical examination and basic biochemical tests were performed; serum 25(OH)D levels were determined, and an echocardiographic evaluation was performed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>We found that decreased serum 25(OH)D levels were associated with impairment in many indicators of cardiac function, such as left ventricular-right ventricular-interventricular septum peak systolic velocity (Sm) and Tei index, inflow peak early diastolic velocity and inflow peak late diastolic velocity ratio (E\/A), annulus early diastolic myocardial peak velocity (E\u2032), and E\/E\u2032 ratio.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>To protect cardiac functions in adolescent athletes, we suggest screening serum 25(OH) D levels during certain periods, such as fall and winter, and vitamin D supplementation if necessary.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/njcp.njcp_732_24","type":"journal-article","created":{"date-parts":[[2025,4,27]],"date-time":"2025-04-27T23:00:09Z","timestamp":1745794809000},"page":"471-479","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":1,"title":["Evaluation of the Relationship between Serum 25(OH) Vitamin D Levels and Cardiac Functions in Adolescent Athletes"],"prefix":"10.4103","volume":"28","author":[{"given":"\u00d6","family":"G\u00fcne\u015f","sequence":"first","affiliation":[{"name":"Department of Pediatrics, Bursa City Hospital, Nil\u00fcfer-Bursa, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"H","family":"Alt\u0131n","sequence":"additional","affiliation":[{"name":"Department of Pediatric Cardiology, University of Health Science, Bursa Medical Faculty, Bursa City Hospital, Bursa, 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