Biological characteristics at the onset of LM.
| Characteristics | n | % |
|---|---|---|
| ANA | 28/28 | 100 |
| SSA antibodies | 10/28 | 36 |
| SSB | 3/28 | 11 |
| Sm | 9/28 | 32 |
| RNP | 9/28 | 32 |
| Anti-dsDNA (Farr/ELISA) | 24/27 | 89 |
| C3 < 0.70 g/l | 18/25 | 72 |
| C4 < 0.14 g/l | 17/23 | 74 |
| CH50 < 70% | 13/18 | 72 |
| Anticardiolipin | 13/25 | 52 |
| Anti-B2GP1 | 5/25 | 20 |
| Lupus anticoagulant | 3/23 | 13 |
| Anemia (Hb < 10 g/dl) | 21/27 | 78 |
| Thrombocytopenia (platelet < 150 g/l) | 9/28 | 32 |
| Leukopenia (WBC < 4.5 g/l) | 11/26 | 42 |
| Troponin > 0.05 µg/l* | 20/25 | 80 |
| CRP > 5 mg/l | 15/17 | 88 |
↵* One patient underwent hemofiltration. ANA: antinuclear antibody; CRP: C-reactive protein; Hb: hemoglobin; WBC: white blood cell; LM: lupus myocarditis.