- A clot in the cardiovascular systems formed during life from constituents of blood; it may be occlusive or attached to the vessel or heart wall without obstructing the lumen (mural t.). [L. fr. G. thrombos, a clot]- ball t. an unattached, spherical antemortem t. found in the left or right atrium usually in certain cases of mitral stenosis.- fibrin t. a t. formed by repeated deposits of fibrin from the circulating blood; it usually does not completely occlude the vessel.- globular t. one of a number of thrombi of varying size, from a pea to a walnut, within the heart cavity, connected by a delicate fibrinous network.- hyaline t. a translucent colorless plug, partly or wholly filling a capillary or small artery or vein, formed by agglutination of red blood corpuscles. SYN: agglutinative t..- mixed t. a laminated t., the layers of different ages being of different color or consistency. SYN: stratified t..- mural t. a t. formed on and attached to a diseased patch of endocardium, not on a valve or on one side of a large blood vessel. SEE ALSO: parietal t..- pale t. SYN: white t..- postmortem t. a clot formed within the heart or in a blood vessel after death, usually mainly red blood cells. SYN: currant jelly t..- propagated t. creeping thrombosis.- red t. a t. formed rapidly by the coagulation of stagnating blood, composed mainly of red blood cells rather than platelets.- stratified t. SYN: mixed t..
* * *throm·bus 'thräm-bəs n, pl throm·bi -.bī, -.bē a clot of blood formed within a blood vessel and remaining attached to its place of origin compare EMBOLUS
* * *n.
* * *throm·bus (thromґbəs) pl. thromґbi [Gr. thrombos clot] a stationary blood clot along the wall of a blood vessel, frequently causing vascular obstruction. Some authorities differentiate thrombus formation from simple coagulation or clot formation. Cf. embolus.
Coronary artery thrombus in a patient with unstable angina; coronary angiography shows a globular thrombus (arrow) in the anterior interventricular branch of the left coronary artery at the level of, and extending into, the second diagonal branch.
Medical dictionary. 2011.