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Clinical manifestations, laboratory results, cardiac ultrasonography, and electrocardiogram features were analyzed. Univariate and multivariate analyses identified significant indicators, which were further assessed using ROC curves to predict SFTS-SVM.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>SFTS-SVM group exhibited higher rates of hypotension, shock, abdominal pain, cough with sputum, and consciousness disorders compared to SFTS-CVM group. Laboratory findings showed elevated platelet count, ALT, AST, amylase, lipase, LDH, D-dimer, procalcitonin, TNI, and NT-proBNP in SFTS-SVM. Abnormal electrocardiograms, especially atrial fibrillation, were more prevalent in SFTS-SVM (<jats:italic>P<\/jats:italic>\u2009&lt;\u20090.05). Multivariate analysis identified elevated LDH upon admission (OR\u2009=\u20091.004, 95% CI: 1-1.008, <jats:italic>P<\/jats:italic>\u2009=\u20090.050), elevated NT-proBNP (OR\u2009=\u20091.005, 95% CI: 1.001\u20131.008, <jats:italic>P<\/jats:italic>\u2009=\u20090.007), and consciousness disorders (OR\u2009=\u2009112.852, 95% CI: 3.676\u2009~\u20093464.292, <jats:italic>P<\/jats:italic>\u2009=\u20090.007) as independent risk factors for SFTS-SVM. LDH and NT-proBNP had AUCs of 0.728 and 0.744, respectively, in predicting SFTS-SVM. Critical values of LDH (&gt;\u2009978.5U\/L) and NT-proBNP (&gt;\u2009857.5pg\/ml)) indicated increased likelihood of SFTS progression into SVM.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Elevated LDH, NT-proBNP, and consciousness disorders independently correlate with SFTS-SVM. LDH and NT-proBNP can aid in early identification of SFTS-SVM development when above specified thresholds.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12879-024-09096-4","type":"journal-article","created":{"date-parts":[[2024,2,22]],"date-time":"2024-02-22T13:02:33Z","timestamp":1708606953000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Clinical characteristics and influencing factors of severe fever with thrombocytopenia syndrome complicated by viral myocarditis: a retrospective study"],"prefix":"10.1186","volume":"24","author":[{"given":"Qian","family":"Du","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin","family":"Yu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qianhui","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoping","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qunqun","family":"Jiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liping","family":"Deng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anling","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Xiong","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,2,22]]},"reference":[{"issue":"16","key":"9096_CR1","doi-asserted-by":"publisher","first-page":"1523","DOI":"10.1056\/NEJMoa1010095","volume":"364","author":"XJ Yu","year":"2011","unstructured":"Yu XJ, Liang MF, Zhang SY, Liu Y, Li JD, Sun YL, Zhang L, Zhang QF, Popov VL, Li C, et al. 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