[Anticoagulant and nonenzymatic fibrinolytic activity of plasma in animals after intravenous injection of a heparin-antithrombin III complex].

The heparin-antithrombin III complex with a weight ratio 1:3 had a powerful anticoagulant and non-enzymatic fibrinolytic activity in vitro. Seven and 30 min after intravenous injection of the complex the animal blood plasma showed a considerable prolongation of the thrombin time and an increase in non-enzymatic fibrinolytic activity. The effect of heparin injected in a dose equivalent to its content in the complex on the parameters under study was appreciably less and disappeared by the 30th minute of the observation period.