Abstract
Recombinant tissue-type plasminogen activator (rt-PA), streptokinase (SK), and anisoylated plasminogen-streptokinase activator complex (APSAC) have salutary effects on mortality when administered to patients with evolving acute myocardial infarction (MI). Studies suggest that intravenous rt-PA is more effective in reperfusing occluded infarct-related arteries than SK, and the results of ongoing studies directly comparing the influence of SK and rt-PA on mortality are awaited. The clinical role of agents such as APSAC, urokinase, and pro-urokinase, used alone or in combination, remains to be determined. It is evident that a variety of thrombolytic agents will be effective, and variables such as ease of administration, pharmacokinetics, fibrin specificity, effects on blood viscosity, and incidence of adverse effects need to be assessed to determine which agents are the most suitable for clinical use. There is an increased risk of bleeding at vascular puncture sites with all thrombolytic agents. Current indications for thrombolytic therapy include ischemic chest pain of at least 30 min duration that is unrelieved by nitroglycerin and is associated with ST-segment elevations of at least 0.1 mV in two contiguous electrocardiographic...Continue Reading
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