[Initial experience in the diagnosis of thrombophilia due to activated protein C resistance].

The authors describe the first in Russia cases of thrombophilia caused by factor Va resistance to activated protein C. This abnormality was diagnosed in 6 of 25 patients (24%) with recurrent early thrombosis. The diagnosis was conducted according to a modified method implying the addition of protac (activator of protein C) to normal platelet poor plasma (PPP) free of factor V containing 100% of protein C.