[Disorders of the system of hemostasis in patients with juvenile rheumatoid arthritis and rheumatic fever].

The investigation of haemostasis has been performed in 55 children aged 2 to 18 years suffering from juvenile rheumatoid arthritis (31 girls and 13 boys) and children suffering from rheumatic fever (7 girls and 4 boys). The results were compared with the control group of 25 healthy children. The minimal abnormalities has been found in the group of children with rheumatic fever in the investigated indices of haemostasis in the beginning of the disease as well as during treatment. In the group of children with juvenile rheumatoid arthritis the following abnormalities has been found: increased platelet count, fibrinogen, fibrinogen degradation products, fibrin, elongation of lysis time of the euglobulines, decrease of the plasminogen concentration.