Variables | n = 47 |
---|---|
Noninvasive diagnosis work-up | |
Diagnostic yield | |
Myocarditis | 6 (13) |
Alternate diagnosis | 14 (30) |
Decompensated dilated cardiomyopathy | 11 (23) |
MINOCA | 2 (4) |
Acute cardiomyopathy | 1 (2) |
Etiological diagnosis | 22 (47) |
Eosinophilic myocarditis | 5 (11) |
Connective tissue disease-related myocarditisa | 4 (8) |
Chemotherapy-induced cardiomyopathy | 3 (6) |
Arrhythmic cardiomyopathy | 2 (4) |
Bacteria-induced cardiomyopathyb | 2 (4) |
Post-partum cardiomyopathy | 2 (4) |
RNA polymerase III autoantibodies-associated myocarditis | 1 (2) |
Othersc | 3 (6) |
Therapeutic modifications | 9 (19) |
Immunosuppressant/immunomodulatory drugsd | 6 (13) |
Antiviral therapy/antibiotics | 2 (4) |
Early cardiac transplantation | 1 (2) |
Biopsy-based diagnosis work-up | |
Diagnostic yield | |
Myocarditis | 24 (51) |
Lymphocytic myocarditis | 13 (28) |
Eosinophilic myocarditis | 5 (11) |
Giant-cell myocarditis | 2 (4) |
Borderline myocarditis | 2 (4) |
Alternate diagnosis | 2 (4) |
Myocardial infarction | 1 (2) |
Inherited cardiomyopathy | 1 (2) |
Absence of diagnosis | 18 (38) |
No myocardial sample | 5 (11) |
Virus-positive sample | 7/39 (18) |
Epstein-Barr Virus | 4/39 (10) |
Parvovirus B19 | 3/39 (8) |
Etiological diagnosis | 10 (21) |
Eosinophilic myocarditis | 5 (11) |
Giant-cell myocarditis | 2 (4) |
Group B streptococcus myocarditis | 1 (2) |
Enterovirus-related myocarditis | 1 (2) |
EBV-related myocarditis | 1 (2) |
Therapeutic modifications | 6 (13) |
Immunosuppressant/immunomodulatory drugse | 5 (11) |
Antiviral therapy/antibiotics | 1 (2) |
Bonaca classification after biopsy results | |
Definite myocarditis | 26 (55) |
Probable myocarditis | 21 (45) |
Myocardial recovery under treatment | 4 (8) |
Noninvasive work-up driven treatmentf | 2 (4) |
Biopsy driven treatmentg | 2 (4) |