Abstract
Background
Myocarditis might be associated with increased markers of myocardial injury. However, data on novel biomarkers, such as high-sensitive Troponin T (hs-TnT) or Copeptin, are lacking. This study aimed to determine the diagnostic and prognostic utility of biomarkers in patients with suspected myocarditis.
Methods
Seventy patients with clinically suspected myocarditis (age 43.4 ± 14 years, 76 % male, ejection fraction 36.9 ± 17.8) underwent endomyocardial biopsy (EMB) and were followed for 7.5 (2–21) months. At the time of EMB, blood samples to evaluate concentrations of hs-TnT, Copeptin, NT-proBNP and mid-regional pro-adrenomedullin (MR-proADM) were collected.
Results
According to EMB, 6 patients were diagnosed with acute myocarditis (AM) and 36 patients with chronic myocarditis (CM). In 28 patients, EMB revealed no myocardial inflammation (NM). Acute myocarditis was associated with the highest concentrations of hs-TnT compared to other groups (AM 262.9 pg/ml (61.4–884.2); CM 20.4 pg/ml (15.6–20.4); NM 19.5 pg/ml (13.8–50.7); p < 0.0001). No significant differences existed in the Copeptin, NT-proBNP, and MR-proADM concentrations between the groups. The concentration of hs-TnT was significantly higher in myocarditis when myocardial viral genome was detected (37.4 pg/ml (21.9–163.6) vs. 20 pg/ml (14–44.4); p = 0.042). During follow-up, only NT-proBNP in the highest quartile (>4,225 ng/ml) was predictive for cardiac death or heart transplantation (hazard ratio 9.2; 95 % confidence interval 1.7–50; p = 0.011).
Conclusions
Biopsy-proven acute and viral myocarditis is associated with elevated concentrations of hs-TnT. Elevated hs-TnT is highly suggestive of acute myocarditis, if other causes of increased myocardial necrosis markers such as myocardial infarction have been systematically excluded.
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Abbreviations
- AM:
-
Acute myocarditis
- CK:
-
Creatinine kinase
- CM:
-
Chronic myocarditis
- EMB:
-
Endomyocardial biopsy
- HF:
-
Heart failure
- Hs-TnT:
-
High-sensitive troponin T
- LVEF:
-
Left ventricular ejection fraction
- MRI:
-
Magnetic resonance imaging
- MR-proADM:
-
Mid-regional pro-adrenomedullin
- NM:
-
No myocardial inflammation
- NT-proBNP:
-
N-terminal pro-B-type natriuretic peptide
- ROC:
-
Receiver operating characteristic
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Acknowledgments
CU, FM, IK, and MB are supported by the Ministry of Science and Economy of the Saarland. CU, FM, and MB are supported by the Deutsche Forschungsgemeinschaft (KFO 196). FM is supported by Deutsche Gesellschaft für Kardiologie und Deutsche Hochdruckliga. RK is supported by the Deutsche Forschungsgemeinschaft (SFB/TR19 “Inflammatory Cardiomypathy”, B5).
Conflict of interest
CU has received speakers’ honoraria by BRAHMS/ThermoFisher, Germany.
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The two authors contributed equally to the study.
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Ukena, C., Kindermann, M., Mahfoud, F. et al. Diagnostic and prognostic validity of different biomarkers in patients with suspected myocarditis. Clin Res Cardiol 103, 743–751 (2014). https://doi.org/10.1007/s00392-014-0709-z
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DOI: https://doi.org/10.1007/s00392-014-0709-z