Background: The goal of thrombolytic treatment in acute myocardial infarction is reperfusion of the infarct-related coronary artery. Duteplase is a double-chain recombinant tissue-type plasminogen activator. Its efficacy and safety were evaluated in patients with acute myocardial infarction treated within 4 h of onset of chest pain in this multicentre, open, non-controlled trial.
Methods and results: A total of 273 patients were enrolled and treated with duteplase 0.6 MU.kg-1 over 4 h, with concomitant oral aspirin and intravenous heparin. Coronary arteriography was performed at 60 min, 90 min and approximately 24 h after the start of duteplase infusion to assess the perfusion grade (TIMI scoring) of the infarct-related coronary artery. Safety was assessed by monitoring patients closely for bleeding and for all other adverse experiences during the 72-h study period. Reinfarction during the study period was also recorded, and deaths at any time during the period in hospital were documented. TIMI grade 2 or 3 patency of the infarct-related coronary artery at 90 min was achieved in 70% of the patients and 7% of these "patent' infarct-related coronary arteries had reoccluded by 20 to 36 h. Clinical reinfarction during the 72-h study period was observed in 7%. Total in-hospital mortality was 8%. Serious or life-threatening bleeding occurred in 4% of the patients. There was one haemorrhagic stroke, and this was fatal.
Conclusions: Weight-adjusted duteplase infusion, together with oral aspirin and intravenous heparin, in acute myocardial infarction resulted in patency of the infarct-related coronary artery and a safety profile comparable to those reported for the other form of tissue-type plasminogen activator, alteplase. However, there remains a problem with reocclusion and reinfarction after initially successful thrombolysis.