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lüll Efficacy and safety of tissue plasminogen activator 3 to 4 5 hours after acute ischemic stroke: a metaanalysis Lansberg MG; Bluhmki E; Thijs VNStroke 2009[Jul]; 40 (7): 2438-41BACKGROUND AND PURPOSE: The Third European Cooperative Acute Stroke Study (ECASS-3) demonstrated a benefit of treatment with intravenous tissue plasminogen activator (tPA) for acute stroke in the 3- to 4.5-hour time-window. Prior studies, however, have failed to demonstrate a significant benefit of tPA for patients treated beyond 3 hours. The purpose of this study was to produce reliable and precise estimates of the treatment effect of tPA by pooling data from all relevant studies. METHODS: A metaanalysis was undertaken to determine the efficacy of tPA in the 3- to 4.5-hour time-window. The effect of tPA on favorable outcome and mortality was assessed. RESULTS: The metaanalysis included data from patients treated in the 3- to 4.5-hour time-window in ECASS-1 (n=234), ECASS-2 (n=265), ECASS-3 (n=821) and The Alteplase Thrombolysis for Acute Noninterventional Therapy in Ischemic Stroke (ATLANTIS) (n=302). tPA treatment was associated with an increased chance of favorable outcome (odds ratio 1.31; 95% CI: 1.10 to 1.56; P=0.002) and no significant difference in mortality (odds ratio 1.04; 95% CI: 0.75 to 1.43; P=0.83) compared to placebo treated patients. CONCLUSIONS: Treatment with tPA in the 3- to 4.5-hour time-window is beneficial. It results in an increased rate of favorable outcome without adversely affecting mortality.|Aged[MESH]|Fibrinolytic Agents/administration & dosage/*adverse effects/*therapeutic use[MESH]|Humans[MESH]|Injections, Intravenous[MESH]|Middle Aged[MESH]|Stroke/*drug therapy[MESH]|Thrombolytic Therapy/methods[MESH]|Time Factors[MESH]|Tissue Plasminogen Activator/administration & dosage/*adverse effects/*therapeutic use[MESH]|Treatment Outcome[MESH] |