| THR | a kind of pharmaceutical that can break up clots blocking the flow of blood to the heart muscle |
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| THR | therapy consisting of the administration of a pharmacological agent to cause thrombolysis of an abnormal blood clot |
| THR | a blood disease characterized by an abnormally small number of platelets in the blood |
| THR | phlebitis in conjunction with the formation of a blood clot (thrombus) |
| THR | an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot |
| THR | become blocked by a thrombus |
| THR | affected with or obstructed by a clot of coagulated blood |
| THR | the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel |
| THR | a blood clot formed within a blood vessel and remaining attached to its place of origin |
| THR | the position and power of one who occupies a throne |
| THR | the chair of state of a monarch, bishop, etc. |
| THR | a plumbing fixture for defecation and urination |