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The significance of blood pressure variability for the development of hemorrhagic transformation in acute ischemic stroke.
MedLine Citation:
PMID:  20947842     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND AND PURPOSE: Elevated blood pressure (BP) is commonly observed in acute ischemic stroke and is known to be associated with hemorrhagic transformation (HT). However, the effect of BP variability on the development of HT is not known well. METHODS: A consecutive series of patients with acute ischemic stroke, who were hospitalized within 24 hours of onset and showed no HT on initial gradient echo MRI, were enrolled in this study. BP measurements during the first 72 hours were obtained, and BP variability of each patient was described using various summary parameters: SD, maximum (max), minimum (min), difference between max and min (max-min), average squared difference between successive measurements (sv), and maximum sv (svmax). RESULTS: Of 792 patients meeting the eligibility criteria, 70 (8.8%) developed HT. Among BP variability parameters categorized into quartiles, SBP(max), SBP(min), SBP(max-min), SBP(svmax), DBP(SD), DBP(max), DBP(min), DBP(max-min), and DBP(svmax) were significantly associated with HT independent of mean SBP, age, interval from onset to arrival, initial stroke severity, diabetes mellitus, stroke subtype, thrombolysis, initial glucose, and total cholesterol (P<0.05 on likelihood ratio test of trend). The analyses about the interaction between thrombolysis and variability parameters showed that the effects of BP variability on the development of HT did not differ by whether patients received thrombolysis or not. CONCLUSIONS: Our study suggests that we may consider not only the absolute level of BP but also its variability to prevent hemorrhagic transformation.
Authors:
Youngchai Ko; Jung Hyun Park; Mi Hwa Yang; Sang-Bae Ko; Moon-Ku Han; Chang Wan Oh; Jisung Lee; Juneyoung Lee; Hee-Joon Bae
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-14
Journal Detail:
Title:  Stroke; a journal of cerebral circulation     Volume:  41     ISSN:  1524-4628     ISO Abbreviation:  Stroke     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-10-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0235266     Medline TA:  Stroke     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2512-8     Citation Subset:  IM    
Affiliation:
Department of Neurology, Eulji University College of Medicine, Korea.
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