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Open AccessJournal ArticleDOI

An international randomized trial comparing four thrombolytic strategies for acute myocardial infarction.

TLDR
The findings of this large-scale trial indicate that accelerated t-PA given with intravenous heparin provides a survival benefit over previous standard thrombolytic regimens.
Abstract
BACKGROUND: The relative efficacy of streptokinase and tissue plasminogen activator and the roles of intravenous as compared with subcutaneous heparin as adjunctive therapy in acute myocardial infarction are unresolved questions. The current trial was designed to compare new, aggressive thrombolytic strategies with standard thrombolytic regimens in the treatment of acute myocardial infarction. Our hypothesis was that newer thrombolytic strategies that produce earlier and sustained reperfusion would improve survival. METHODS: In 15 countries and 1081 hospitals, 41,021 patients with evolving myocardial infarction were randomly assigned to four different thrombolytic strategies, consisting of the use of streptokinase and subcutaneous heparin, streptokinase and intravenous heparin, accelerated tissue plasminogen activator (t-PA) and intravenous heparin, or a combination of streptokinase plus t-PA with intravenous heparin. ("Accelerated" refers to the administration of t-PA over a period of 1 1/2 hours--with two thirds of the dose given in the first 30 minutes--rather than the conventional period of 3 hours.) The primary end point was 30-day mortality. RESULTS: The mortality rates in the four treatment groups were as follows: streptokinase and subcutaneous heparin, 7.2 percent; streptokinase and intravenous heparin, 7.4 percent; accelerated t-PA and intravenous heparin, 6.3 percent, and the combination of both thrombolytic agents with intravenous heparin, 7.0 percent. This represented a 14 percent reduction (95 percent confidence interval, 5.9 to 21.3 percent) in mortality for accelerated t-PA as compared with the two streptokinase-only strategies (P = 0.001). The rates of hemorrhagic stroke were 0.49 percent, 0.54 percent, 0.72 percent, and 0.94 percent in the four groups, respectively, which represented a significant excess of hemorrhagic strokes for accelerated t-PA (P = 0.03) and for the combination strategy (P < 0.001), as compared with streptokinase only. A combined end point of death or disabling stroke was significantly lower in the accelerated-tPA group than in the streptokinase-only groups (6.9 percent vs. 7.8 percent, P = 0.006). CONCLUSIONS: The findings of this large-scale trial indicate that accelerated t-PA given with intravenous heparin provides a survival benefit over previous standard thrombolytic regimens

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The New England Journal of Medicine as published by New England Journal of Medicine.
Downloaded from www.nejm.org at ERASMUS UNIVERSITY on July 30, 2010. For personal use only. No other uses without permission.
Copyright © 1993 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine as published by New England Journal of Medicine.
Downloaded from www.nejm.org at ERASMUS UNIVERSITY on July 30, 2010. For personal use only. No other uses without permission.
Copyright © 1993 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine as published by New England Journal of Medicine.
Downloaded from www.nejm.org at ERASMUS UNIVERSITY on July 30, 2010. For personal use only. No other uses without permission.
Copyright © 1993 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine as published by New England Journal of Medicine.
Downloaded from www.nejm.org at ERASMUS UNIVERSITY on July 30, 2010. For personal use only. No other uses without permission.
Copyright © 1993 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine as published by New England Journal of Medicine.
Downloaded from www.nejm.org at ERASMUS UNIVERSITY on July 30, 2010. For personal use only. No other uses without permission.
Copyright © 1993 Massachusetts Medical Society. All rights reserved.

Citations
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ESC Guidelines for the Management of Acute Myocardial Infarction in Patients Presenting With ST-Segment Elevation

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Journal ArticleDOI

Primary angioplasty versus intravenous thrombolytic therapy for acute myocardial infarction : A quantitative review of 23 randomised trials

TL;DR: The results seen with primary PTCA remained better than those seen with thrombolytic therapy during long-term follow-up, and were independent of both the type of throm bolytic agent used and whether or not the patient was transferred for primary P TCA.
Journal ArticleDOI

Standardized Bleeding Definitions for Cardiovascular Clinical Trials A Consensus Report From the Bleeding Academic Research Consortium

TL;DR: Bleeding complications have been associated with an increased risk of subsequent adverse outcomes, including MI, stroke, stent thrombosis, and death, in patients with ACS and in those undergoing percutaneous coronary intervention (PCI) as well as in the long-term antithrombotic setting.
References
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Journal ArticleDOI

A multiple testing procedure for clinical trials.

TL;DR: The overall size of the procedure is shown to be controlled with virtually the same accuracy as the single sample chi-square test based on N(m1 + m2) observations and the power is found to bevirtually the same.
Journal ArticleDOI

Discrete sequential boundaries for clinical trials

K. K. Gordon Lan, +1 more
- 01 Dec 1983 - 
TL;DR: In this article, the authors proposed a more flexible method to construct discrete sequential boundaries based on the choice of a function, a*(t), which characterizes the rate at which the error level ac is spent.
Journal ArticleDOI

A Comparison between Heparin and Low-Dose Aspirin as Adjunctive Therapy with Tissue Plasminogen Activator for Acute Myocardial Infarction

TL;DR: Coronary patency rates associated with rt-PA are higher with early concomitant systemic heparin treatment than with concomant low-dose oral aspirin, and should be considered in the design and interpretation of clinical trials involving coronary thrombolytic therapy.
Journal ArticleDOI

Illusion of reperfusion. Does anyone achieve optimal reperfusion during acute myocardial infarction

TL;DR: Emerging strategies to achieve optimal reperfusion are directed at enhancement of the velocity and quality of thrombolysis, amelioration of the adverse effects of reperfusions, and use of alternative pathways to myocardial salvage.
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