tissue plasminogen activator n.
An enzyme that catalyzes the conversion of plasminogen to plasmin, used to dissolve blood clots rapidly and selectively, especially in the treatment of heart attacks.
|tissue plasminogen activator
An enzyme that dissolves blood clots. It can be produced naturally by cells in the walls of blood vessels, or prepared through the use of genetic engineering. Tissue plasminogen activator is used in the coronary arteries during heart attacks and in the cranial arteries in certain types of strokes.