- Formation or presence of a thrombus; clotting within a blood vessel which may cause infarction of tissues supplied by the vessel. [G. t., a clotting, fr. thrombos, clot]- atrophic t. t. due to feebleness of the circulation, as in marasmus. SYN: marantic t., marasmic t..- coronary t. coronary occlusion by thrombus formation, usually the result of atheromatous changes in the arterial wall and usually leading to myocardial infarction.- creeping t. a gradually increasing t. involving one section of a vein after another in continuity.- effort-induced t. SYN: Paget-von Schrötter syndrome.- mural t. the formation of a thrombus in contact with the endocardial lining of a cardiac chamber, or a large blood vessel, if not occlusive.- posttraumatic arterial t., posttraumatic venous t. intravascular clotting due to injury to a vessel wall.
* * *throm·bo·sis thräm-'bō-səs, thrəm- n, pl -bo·ses -.sēz the formation or presence of a blood clot within a blood vessel see coronary thrombosis, deep vein thrombosis
* * *n.a condition in which the blood changes from a liquid to a solid state and produces a blood clot (thrombus). Thrombosis may occur within a blood vessel in diseased states. Thrombosis in an artery obstructs the blood flow to the tissue it supplies: obstruction of an artery to the brain is one of the causes of a stroke and thrombosis in an artery supplying the heart - coronary thrombosis - results in a heart attack (see myocardial infarction). Thrombosis can also occur in a vein (deep vein thrombosis; see phlebothrombosis), and it may be associated with inflammation (see thrombophlebitis). The thrombus may become detached from its site of formation and carried in the blood to lodge in another part (see embolism).
* * *throm·bo·sis (throm-boґsis) [Gr. thrombōsis] the formation, development, or presence of a thrombus. thrombotic adj
Medical dictionary. 2011.