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Cerebral Microbleeds and Asymptomatic Cerebral Infarctions in Patients with Atrial Fibrillation.
MedLine Citation:
PMID:  24680089     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Atrial fibrillation (AF) is a cardiac arrhythmia that does not infrequently induce ischemic strokes; however, little research has been reported on focal cerebral microangiopathic lesions in patients with AF. Recently cerebral microbleeds (CMBs) have been noticed for their potential implication in cerebral small vessel disease. Therefore, we had 2 goals in the present study: (1) to compare the prevalence of CMBs in patients with AF with that in patients without AF, and (2) to prove that CMBs could be a clinical predictive factor for the development of future cerebral microangiopathy in patients with AF without a history of symptomatic cerebral infarction in a prospective manner.
METHODS: We performed yearly brain magnetic resonance imaging (MRI) assessments for a maximum of 5 years in 131 patients with AF and 112 control patients. Seventy-seven patients with AF underwent more than 3 yearly MRI scans.
RESULTS: The Kaplan-Meier curve showed that the development of an asymptomatic cerebral infarction (ACI) was associated with the baseline presence of a CMB (P = .004). A multivariate Cox regression analysis revealed that the CMBs at baseline were significantly associated with an increment in not only the occurrence of ACIs (hazard ratio [HR], 5.414; 95% confidence interval [CI], 1.03-28.43; P = .046) but also in the consecutive development of CMBs (HR, 6.274; 95% CI, 1.43-27.56; P = .015).
CONCLUSIONS: Patients with AF had a significantly higher prevalence of CMBs. The presence of CMBs in the baseline MRI may predict the consequent onset of an ACI and increase in CMBs in patients with AF.
Authors:
Tsukasa Saito; Yuichiro Kawamura; Yasuko Tanabe; Asuka Asanome; Kae Takahashi; Jun Sawada; Takayuki Katayama; Nobuyuki Sato; Hitoshi Aizawa; Naoyuki Hasebe
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-3-27
Journal Detail:
Title:  Journal of stroke and cerebrovascular diseases : the official journal of National Stroke Association     Volume:  -     ISSN:  1532-8511     ISO Abbreviation:  J Stroke Cerebrovasc Dis     Publication Date:  2014 Mar 
Date Detail:
Created Date:  2014-3-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9111633     Medline TA:  J Stroke Cerebrovasc Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 National Stroke Association. Published by Elsevier Inc. All rights reserved.
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