title: The prognostic significance of serum troponin T levels in Crimean-Congo hemorrhagic fever patients.
abstract: Crimean-Congo Hemorrhagic Fever (CCHF) is a disease transmitted by the Crimean-Congo hemorrhagic fever virus (CCHFV), characterized by severe fever and hemorrhage and with a reported fatality level of 3-30%. Cerebral hemorrhage, gastrointestinal hemorrhage, severe anemia, shock, myocardial infarction, pulmonary edema, and pleural effusion may be seen as causes of death. Cardiac troponin T (cTn-T) is a biochemical marker with high sensitivity and specificity in myocardial injury. The purpose of this study was to determine the prognostic significance of serum troponin T levels in CCHF patients. Patients hospitalized with a diagnosis of CCHF and whose serum cTn-T was investigated were examined retrospectively. Patients were divided into two groups on the basis of presence or absence of hemorrhage. Data were subjected to statistical analysis. One hundred thirty-five CCHF patients and 72 control subjects were included. Hemorrhage was present in 48 (35.6%) patients. Mean serum cTn-T level was 17.3 ± 28.0 ng/L in the patients with hemorrhage, 9.98 ± 5.97 ng/L in the non-hemorrhage patients (P = 0.001) and 6.6P = 2.6 ng/L in the control samples (P < 0.001). At a cTn-T level cut-off point of 9 ng/L, area under the ROC curve was 0.797 (95%CI: 0.730-0.854), sensitivity 83.0%, specificity 87.5%, PPD 95.7%, and NPV 60.3%. At logistic regression analysis, a rise in cTn-T level above 14 ng/L increased the probability of hemorrhage in CCHF patients approximately threefold. An increased troponin T level may be a prognostic risk factor for hemorrhage in CCHF patients. This marker should therefore be borne in mind in determining treatment strategy in these patients. J. Med. Virol. 89:408-412, 2017. © 2015 Wiley Periodicals, Inc.
authors.affiliation: Department of Medical Biochemistry, Karadeniz Technical University, Faculty of Medicine and Kanuni Training and Research Hospital, Trabzon, Turkey.
authors.forename: Hülya
authors.initials: H
authors.lastname: Yilmaz
authors.affiliation: Department of Infectious Diseases and Clinical Microbiology, Karadeniz Technical University, Faculty of Medicine, Trabzon, Turkey.
authors.forename: Gürdal
authors.initials: G
authors.lastname: Yilmaz
authors.affiliation: Department of Infectious Diseases and Clinical Microbiology, Recep Tayyip Erdoğan University, Faculty of Medicine, Rize, Turkey.
authors.forename: Uğur
authors.initials: U
authors.lastname: Kostakoğlu
authors.affiliation: Department of Medical Biochemistry, Kanuni Training and Research Hospital, Trabzon, Turkey.
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Yaman
authors.affiliation: Department of Medical Biochemistry, Karadeniz Technical University, Faculty of Medicine, Trabzon, Turkey.
authors.forename: Asım
authors.initials: A
authors.lastname: Örem
authors.affiliation: Department of Infectious Diseases and Clinical Microbiology, Karadeniz Technical University, Faculty of Medicine, Trabzon, Turkey.
authors.forename: İftihar
authors.initials: İ
authors.lastname: Köksal
mesh_terms: D000328:Adult; D000368:Aged; D015415:Biomarkers / Q000097:blood*; D003955:Diagnostic Tests, Routine / Q000379:methods*; D005260:Female; D006470:Hemorrhage / Q000175:diagnosis* / Q000473:pathology; D006479:Hemorrhagic Fever, Crimean / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012372:ROC Curve; D012189:Retrospective Studies; D012680:Sensitivity and Specificity; D044967:Serum / Q000737:chemistry*; D020107:Troponin T / Q000097:blood*
chemical_list: D015415:Biomarkers; D020107:Troponin T
keywords: CCHF; Crimean-Congo hemorrhagic fever; cTn-T; troponin T