A low plasma antithrombin activity measurement means that the patient is hypercoagulable and at risk for thrombosis.
Antithrombin III is the most important factor in the anticoagulation system, and it is the activity of antithrombin III that is commonly referred to as antithrombin activity measurement.
Antithrombin III is synthesized by the liver, and its main function is to inhibit the synthesis of thrombin. The significance of its presence is that it allows the body to perform its clotting function without the formation of blood clots. Maintains the balance between the blood system and the anticoagulant system.
Antithrombin III alone has low antithrombin activity, but when combined with heparin, it can greatly increase the activity of antithrombin.