on January 15, 2004
Published online before print January 15, 2004, doi: 10.1161/01.STR.0000109769.22917.B0
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Submitted on September 17, 2003
From the Department of Neurology, Hospital Clínico Universitario, University of Santiago de Compostela (J.C., R.L., M.B.), Santiago de Compostela; and Department of Neurology (J.S., A.D.) and Unit of Biostatistics (M.M.G.), Hospital Universitari Doctor Josep Trueta, Girona, Spain. * To whom correspondence should be addressed. E-mail: mecasti{at}usc.es.
Background and Purpose--Studies on the relation between blood pressure (BP) and stroke outcome have shown contradictory results. We explored the association of systolic (SBP) and diastolic (DBP) BP during acute stroke with early neurological deterioration, infarct volume, neurological outcome, and mortality at 3 months. Methods--We included 304 patients with acute ischemic stroke. SBP and DBP on admission and on the first day were the average values of all readings obtained in the emergency department and during a 24-hour period after patient allocation in the stroke unit. Results--A U-shaped effect was observed: for every 10 mm Hg Conclusions--High and low SBP and DBP, as well as a relevant drop in BP, are associated with poor prognosis in patients with ischemic stroke.
Accepted on October 3, 2003
Blood Pressure Decrease During the Acute Phase of Ischemic Stroke Is Associated With Brain Injury and Poor Stroke Outcome
José Castillo MD, PhD*;
180 mm Hg of SBP, the risk of early neurological deterioration, poor outcome, and mortality increased by 6%, 25%, and 7%, respectively, whereas for every 10 mm Hg >180 mm Hg, the risk of early neurological deterioration increased by 40% and the risk of poor outcome increased by 23%, with no effect on mortality. Mean infarct volume increased 7.3 and 5.5 cm3 for every 10 mm Hg 180 and >180 mm Hg. A similar pattern was found in patients with DBP 100 or >100 mm Hg. These effects disappeared after adjustment for the use of antihypertensive drugs and BP drop >20 mm Hg within the first day, with the latter being the more important prognostic factor of poor outcome.
Key words: blood pressure • cerebral infarction • hypertension • prognosis • stroke
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