The study of hemostasis and NAD(P)-dependent platelet dehydrogenases activity was made in 90 patients with cerebrovascular complications (development of ischemic stroke) of hypertension and coronary heart disease. On the basis of NADP-dependent platelet dehydrogenases activity we suggested a mode of prognostication a development of repeated cerebrovascular complications of thrombotic nature (the acute stroke, transitory ischemic attack, acute myocardial infarction, cardiovascular death). The proposed prognostic factor has heightened sensibility and specificity.