Thromboelastography angle assesses the rate of fibrin clot formation and interconnection (clot consolidation) and reflects fibrinogen function. A low thromboelastogram angle means low fibrinogen function, which is a low coagulation state that should be further examined to find the cause of the condition and treat it. A low thromboelastogram angle may be due to hypofibrinogenemia or the effects of heparin. If it is hypofibrinogenemia, it should be treated with fibrinogen supplementation. If heparin is involved, the dose of heparin should be reduced or heparin discontinued. There are many reasons for abnormal thromboelastography angularity. When thromboelastography angularity is abnormal, it is important to seek medical attention to find the cause of the abnormality, and to treat the abnormality under the guidance of a physician.