Abstract
Aim
To analyze the long-term outcome after immunosuppressive treatment of patients with virus-negative chronic myocarditis or inflammatory cardiomyopathy (CMi).
Methods and results
We investigated 114 patients with endomyocardial biopsy (EMB)-proven virus-negative chronic myocarditis or CMi, who were treated with prednisone and azathioprine for 6 months. Myocardial inflammation was assessed by quantitative immunohistology. We examined hemodynamic measurements after 6 months and long-term follow-up periods of up to 10 years {median 10.5 months [95 % confidence interval (CI) 11.69–59.16]}. At follow-up, the patients showed a significant improvement of left ventricular ejection fraction (LVEF) compared to baseline after 6-month period (LVEF rising from 44.6 ± 17.3 to 51.8 ± 15.5 %, p = 0.006) and in the long-term follow-up (LVEF 52.1 ± 15.6 %, p = 0.006). Simultaneously, EMB-analysis revealed significant reduction of quantified inflammatory infiltrates (CD3+ cells 16.03 ± 29.09–8.2 ± 9.0/mm2, p = 0.002; CD2+ cells 12.62 ± 20.01 to 6.61 ± 8.47/mm2, p = 0.001; perforin+ cells 3.94 ± 4.65–1.03 ± 1.47/mm2, p = 0.0001), and cell-adhesion molecule HLA-1 [9.91 ± 5.55–6.65 ± 2.81/area fraction (AF), p = 0.0001]. In a subgroup analysis, patients with initial LVEF ≤45 % (n = 53) significantly increased with LVEF at follow-up (29.3 ± 8.8–41.7 ± 13.2–42.1 ± 13.1 %, p < 0.0001, Group I), defined as CMi. Patients with initial LVEF >45–60 % (n = 25) significantly improved further or recovered completely, regarding LVEF (53.0 ± 3.6–59.0 ± 9.4–59.8 ± 10.0 %, p = 0.03, Group II). Patients with initial LVEF >60 % (n = 36) remained stable and did not deteriorate over long-term follow-up (68.8 ± 6.7–67.5 ± 10.9–68.8 ± 10.7 %, p = 0.5, Group III). Groups II and III were defined as chronic myocarditis.
Conclusions
In patients with virus-negative chronic myocarditis or CMi, we could show the effectiveness and beneficial effects of immunosuppressive treatment. Based on the normalization of the inflammatory process LVEF improvement is lasting for a long-term period of time.
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Abbreviations
- AF:
-
Area fraction
- CAMs:
-
Cell-adhesion molecules
- CMi:
-
Inflammatory cardiomyopathy
- DIA:
-
Digital image analysis
- EMB:
-
Endomyocardial biopsy
- HLA-1:
-
Human leukocyte antigen-1
- IH:
-
Immunohistology
- LVEDD:
-
Left ventricular end-diastolic diameter
- LVESD:
-
Left ventricular end-systolic diastolic diameter
- LVEF:
-
Ejection fraction
- Npcr:
-
Nested polymerase chain reaction
- RT-PCR:
-
Reverse transcription PCR
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Acknowledgments
This study was supported by the Deutsche Forschungsgesellschaft (DFG; SFB/TR-19). We thank Ms. E. Hertel, M. Willner (Charité-Universitätsmedizin Berlin), K. Winter, S. Ochmann, and C. Seifert (IKDT Berlin) for excellent assistance.
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Escher, F., Kühl, U., Lassner, D. et al. Long-term outcome of patients with virus-negative chronic myocarditis or inflammatory cardiomyopathy after immunosuppressive therapy. Clin Res Cardiol 105, 1011–1020 (2016). https://doi.org/10.1007/s00392-016-1011-z
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DOI: https://doi.org/10.1007/s00392-016-1011-z