Blood Pressure in Acute Stroke

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Abstract
This study examines blood pressure (BP) and independent factors related to BP in the acute phase of stroke. The study is part of the community-based Copenhagen Stroke Study. In a multivariate regression model we analyzed the impact of clinical and medical factors on admission BP. BP declined with increasing time from stroke onset with a total of 8/4 mm Hg. Independent factors related to diastolic BP were ischemic heart disease (–3.9 mm Hg), male gender (2.2 mm Hg), known hypertension prior to stroke (8.6 mm Hg), and primary hemorrhage (9.7 mm Hg). Independent factors related to systolic BP were age (3.6 mm Hg/10-year increase), atrial fibrillation (–7.2 mm Hg), ischemic heart disease (–6.0 mm Hg), intracerebral hemorrhage (13.3 mm Hg), and known hypertension prior to stroke (16.3 mm Hg). No independent relations were seen between BP and diabetes, claudication, previous stroke, smoking, daily alcohol consumption, initial stroke severity and lesion size. The increase in BP in the acute phase of stroke is a uniform response to the ischemic event per se. BP is not related to stroke severity. Several factors are independently related to the BP level in acute stroke. The clinical significance of this is yet to be tested, but these factors may contribute to the seemingly complex relation between BP and outcome.

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