Document Detail

Design of a PROspective multi-national CLOTBUST collaboration on reperfusion therapies for stroke (CLOTBUST-PRO).
MedLine Citation:
PMID:  18705918     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The benefit of intravenous (i.v.) tissue plasminogen activator (tPA) in acute ischemic stroke (IS) is attributable to lysis of thrombus and restoration of perfusion to ischemic but not yet infarcted brain. AIMS: Our multicentre collaborative group prospectively implemented a protocol for transcranial Doppler assessment of intracranial recanalization with tPA treatment based on the CLOTBUST clinical trial (CLOTBUST-PRO). We aim to determine whether early recanalization (within 1 h from tPA bolus) is independently associated with better 3-month outcome in patients with intracranial arterial occlusions and correlates to a shorter time interval elapsed from symptom onset to tPA bolus. SUBJECTS AND METHODS: Consecutive patients with acute IS due to intracranial arterial occlusions will be treated with standard i.v.-tPA and continuously monitored with 2 MHz Transcranial Doppler for arterial recanalization. Early recanalization will be determined with the previously validated Thrombolysis in Brain Ischemia flow-grading system within 60 min after tPA bolus. Power calculations are based on the assumption of alpha=0.05 (two-sided test) and probabilities of functional independence at 3 months of 0.50 and 0.35 in patients with early complete recanalization and persisting occlusion, respectively. Detection of a 15% difference with a power of 0.824 requires an estimated sample of 480 patients of whom 25% are expected to achieve early recanalization while 75% will have persisting occlusion at 1 h after tPA bolus. We also plan to test prespecified secondary hypotheses within the projected study sample. CONCLUSIONS: CLOTBUST-PRO is designed to determine if the timing (within 1 h from tPA bolus) of tPA-induced arterial recanalization is an independent determinant of 3-month functional recovery. We also seek to demonstrate that the sooner the tPA is given to stroke patients, the earlier the recanalization occurs and the greater is the likelihood of functional independence at 3 months.
Maher Saqqur; Georgios Tsivgoulis; Carlos A Molina; Andrew M Demchuk; Zsolt Garami; Andrew Barreto; Konstantinos Spengos; Alex Forteza; Robert Mikulik; Vijay K Sharma; Alex Brunser; Patricia Martinez; Joan Montaner; Martin Kohrmann; Peter D Schellinger; Andrei V Alexandrov;
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of stroke : official journal of the International Stroke Society     Volume:  3     ISSN:  1747-4949     ISO Abbreviation:  -     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-08-18     Completed Date:  2008-11-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101274068     Medline TA:  Int J Stroke     Country:  England    
Other Details:
Languages:  eng     Pagination:  66-72     Citation Subset:  IM    
Department of Medicine (Neurology), University of Alberta, Alberta, Canada.
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MeSH Terms
Fibrinolytic Agents / administration & dosage,  therapeutic use
Infusions, Intravenous
Multicenter Studies as Topic
Prospective Studies
Reperfusion / methods*
Research Design
Stroke / therapy*
Tissue Plasminogen Activator / administration & dosage,  therapeutic use*
Reg. No./Substance:
0/Fibrinolytic Agents; EC Plasminogen Activator

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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