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Towards Understanding the Cause of Stroke in Young Adults Utilising a New Stroke Classification System (A-S-C-O).
MedLine Citation:
PMID:  22179549     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Background: Stroke in younger people is relatively common and frequently unexplained. While understanding of the causes of young stroke has improved, there remains uncertainty over the role of low-risk lesions such as a patent foramen ovale (PFO). The TOAST criteria are often used to describe stroke aetiology, but in younger people in whom PFOs are frequent, there is a very high proportion of cases attributed to cardiac embolism. The impact of using the newer A-S-C-O criteria on stroke aetiology was investigated. Methods: Consecutive patients with ischaemic stroke were investigated and categorised by the TOAST and ASCO1 criteria. Stroke aetiology was presented and compared by the different classification systems. Results: Of the 106 ischaemic stroke cases, by TOAST 6% were 'large artery atheroma', 11% 'small vessel occlusion', 28% 'cardioembolic', 22% 'other determined cause' and 33% 'undetermined cause'. The vascular territory and associated causes are presented. With the ASCO1 criteria, there were more cases of unclassified stroke (51.9 vs. 34.0%; p < 0.001) and fewer cases of cardiac embolism. Kappa ranged from 0.5 for 'undetermined aetiology' to 1.0 for both 'large artery atheroma' and 'other determined aetiology'. Younger cases (<45 years) were less likely to be either 'large artery atheroma' or 'small vessel occlusion'. Conclusion: Using the ASCO criteria, more patients fall into the undetermined group which more accurately reflects our current uncertainty regarding the pathogenic relevance of PFOs in this age group.
Authors:
P E Cotter; M Belham; P J Martin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-12-14
Journal Detail:
Title:  Cerebrovascular diseases (Basel, Switzerland)     Volume:  33     ISSN:  1421-9786     ISO Abbreviation:  -     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9100851     Medline TA:  Cerebrovasc Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  123-127     Citation Subset:  -    
Copyright Information:
Copyright © 2011 S. Karger AG, Basel.
Affiliation:
Department of Medicine, University of Cambridge, Cambridge, UK.
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