(Stroke. 1998;29:2529-2540.)
© 1998 American Heart Association, Inc.
Original Contributions |
Thrombolysis With Intravenous rtPA in a Series of 100 Cases of Acute Carotid Territory Stroke
Determination of Etiological, Topographic, and Radiological Outcome Factors
From the Cerebrovascular Unit and Ataxia Research Center, Hôpital Neurologique, Lyon, France (P.T., N.N., L.D., J.H., G.R., P.N., J.C.G., W.L.); the Biostatistical Unit of Claude Bernard University (P.A.); the Department of Neuroradiology, Hôpital Neurologique, Lyon, France (J.C.F., F.T., Y.B.); the Emergency Units of Lyon Hospitals (D.M., J.F.); the Emergency Unit of Moutiers Hospital (A.L.G., X.L.) Moutiers, France; and the Hematological and Coagulation Laboratory (P.F., M.D.), Hôpital Neurologique, Lyon, France.
Correspondence to P. Trouillas, Cerebrovascular Unit and Ataxia Research Center, Hôpital Neurologique, 59, boulevard Pinel, 69003 Lyon, France.
Background and Purpose—Although new, large, double-blind, randomized studies are needed to establish the efficiency of intravenous thrombolysis, open trials of sufficient size may also provide novel data concerning specific outcomes after thrombolysis.
Methods—An open study of intravenous rtPA in 100 patients with internal carotid artery (ICA) territory strokes between 20 and 81 years of age, with a baseline Scandinavian Stroke Scale (SSS) score of <48 at entry was conducted. Inclusion time was within 7 hours after stroke onset. rtPA (0.8 mg/kg) was infused for 90 minutes, with an initial 10% bolus. Heparin was given according to 3 consecutive protocols. The SSS evaluation was done on days 0, 1, 7, 30, and 90. CT scan was performed before treatment, on days 1 and 7. Etiological investigations included echocardiography and carotid Doppler sonography and/or angiography. Outcome at 1 year was documented by SSS score, the modified Rankin Scale (mRS) score, and a 10-point invalidity scale. Multivariate logistic regression was used to identify predictors of poor versus good outcome.
Results—At day 90, 45 patients (45%) had a good result, defined as complete regression or slight neurological sequelae (mRS score of 0–1), 18 patients had a moderate outcome (mRS 2–3), and 31 patients had serious neurological sequelae (mRS 4–5). Six patients died, 2 with intracerebral hematoma after immediate heparin. Five of 11 patients (45.5%) treated between 6 and 7 hours had a good result. The overall intracerebral hematoma rate was 7%. Higher values of fibrin degradation products at 2 hours were observed in the subgroup with intracerebral hematomas. Significant predictors of poor outcome on multivariate logistic regression analysis were baseline SSS score of <15 (odds ratio [OR], 3.38; 95% confidence interval [CI], 1.07 to 10.74; P=0.04), indistinction between white and gray matter on CT scan (OR, 6.59; 95% CI, 2.19 to 19.79; P=0.0008), and proximal internal carotid thrombosis (OR, 3.29; 95% CI, 0.99 to 10.95; P=0.05).
Conclusions—Our study confirms the safety of intravenous rtPA at a dose of 0.8 mg/kg and suggests efficacy for this drug even within 7 hours. Outcome and hematoma rates were at least as favorable as for trials of therapy with a 3-hour time window. Subgroups with a poor prognosis include low baseline neurological score, baseline CT changes, and proximal ICA thrombosis. However, approximately 30% of patients with each of these characteristics show a good outcome, so their inclusion in future routine rtPA protocols is still justified.
Key Words: proximal internal carotid thrombosis • heparin • mannitol • plasminogen activator, tissue type • tomography, emission computed • thrombolytic therapy
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