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Safety of Intravenous Thrombolysis within 4.5 h of Symptom Onset in Patients with Negative Post-Treatment Stroke Imaging for Cerebral Infarction.
MedLine Citation:
PMID:  21394544     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Patients with stroke symptoms but negative diffusion-weighted imaging (DWI) might have transient ischemic attacks (TIA) or stroke mimics. Brain DWI is important for the diagnosis of cerebral infarction but it is not available before thrombolysis for most patients to avoid treatment delay. This study aimed to evaluate the safety of IV thrombolysis in patients with a negative post-treatment DWI for cerebral infarction. METHODS: We conducted a retrospective study of 89 patients treated with IV recombinant tissue plasminogen activator (rt-PA) within 4.5 h after stroke symptom onset. The patients were identified in our acute stroke registry from January 2009 to September 2010. Information on patients' demographics, clinical characteristics, neuroimaging, treatment complications, and outcomes was obtained and analyzed. RESULTS: Out of 89 patients, 23 patients (26%) had a negative DWI on follow-up stroke imaging. Fourteen patients had a TIA and nine patients had a stroke mimic, including Todd's paralysis, complicated migraine, and somatoform disorder. We found significant differences between patients with a positive and a negative DWI in mean age (62 years vs. 52 years; P < 0.01) and median admission NIH stroke scale score (11 points versus 6 points; P < 0.001). Among patients with a positive DWI, four patients had a symptomatic intracerebral hemorrhage (ICH). No patients with a negative DWI had symptomatic or asymptomatic ICH. CONCLUSIONS: Our results suggest that the administration of IV rt-PA within the first 4.5 h of symptom onset in patients with suspected ischemic stroke is safe even when post-treatment DWI does not demonstrate cerebral infarction.
Authors:
Elias A Giraldo; Aisha Khalid; Ramin Zand
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-11
Journal Detail:
Title:  Neurocritical care     Volume:  -     ISSN:  1556-0961     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101156086     Medline TA:  Neurocrit Care     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA, giraldo.elias@mayo.edu.
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