RT Journal Article SR Electronic T1 Recombinant t-PA and platelet activity JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 537 OP 541 VO 57 IS 6 A1 Becker, Richard C. YR 1990 UL http://www.ccjm.org/content/57/6/537.abstract AB Platelet-rich coronary arterial occlusions are relatively resistant to thrombolysis with recombinant tissue-type plasminogen activator, or rt-PA, while erythrocyte-rich thrombi are lysed at low doses. The combined administration of rt-PA with a platelet antagonist enhances thrombolysis and can prevent reocclusion, which suggests that platelet activation predominates during thrombus formation and after thrombolysis. In addition to direct effects on platelet activity, rt-PA also acts indirectly through generation of plasmin, which degrades fibrin.