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Cognitive Outcome After Carotid Surgery
Studie Overzicht
Toestand
Conditie
Gedetailleerde beschrijving
At the present time, large multi-center clinical trials support the use of carotid revascularization for symptomatic carotid stenosis and for asymptomatic carotid stenosis (greater than 60%) to prevent stroke. Guidelines supporting the use of carotid endarterectomy for asymptomatic stenosis are based largely on the Asymptomatic Carotid Atherosclerosis Study (ACAS) which reported a 47% relative risk reduction for ipsilateral stroke or death in patients randomized to surgery compared to best medical management over 5 years. These data were further substantiated by the recent publication of the Medical Research Council Asymptomatic Carotid Surgery (ACST) trial results (1); however, both trials estimated that at least 40 operative procedures were required to prevent a single disabling stroke or death in one patient after 5 years (2). These data underscore the importance of understanding the cognitive risks of carotid revascularization and developing strategies to limit factors that contribute to this risk especially in asymptomatic patients.
The purpose of this study is to better understand the effect of carotid revascularization (using either carotid endarterectomy (CEA) or percutaneous carotid angioplasty and stenting (CAS)) on cognitive outcome by prospectively collecting cerebral blood flow data and cognitive testing data prior to and after carotid revascularization procedures.
Studietype
Inschrijving (Verwacht)
Contacten en locaties
Studie Locaties
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Massachusetts
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Burlington, Massachusetts, Verenigde Staten, 01805
- Lahey Clinic, Inc.
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New York
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Buffalo, New York, Verenigde Staten, 14203
- University of Buffalo Neurosurgery (UBNS)
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Stony Brook, New York, Verenigde Staten, 11794-8122
- StonyBrook
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Geslachten die in aanmerking komen voor studie
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Inclusion Criteria:
- Patients with asymptomatic (defined as no symptoms in past 6 months) carotid stenosis
- Patients with hemodynamically significant carotid artery stenosis (according to CREST criteria: ≥ 60% by angiography, OR ≥ 70% by ultrasound, OR ≥ 80% by CTA or MRA)
Exclusion Criteria:
- Patients with prior large vessel infarct
- Patients with intracranial stenosis
- Patients with major depression
- Patients with Alzheimer disease (clinically defined or Wechsler IQ <80)
- Patients who have had previous ipsilateral carotid surgery
- Patients with baseline dementia defined as: Mini-Mental Status Examination score < 21 OR Mini-Mental score ≥21 AND Baseline HVLT scores more than 3 standard deviations below normal or FAS scores more than 2 standard deviations below normal OR other clinical symptoms that were not as evident on direct cognitive assessment (e.g. sundowning, getting lost while driving).
Note: A control group would be comprised of about 15 patients who meet eligibility criteria as above, but elect to have their condition followed rather than undergo revascularization.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Cohorten en interventies
Groep / Cohort |
|---|
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Carotid Endarterectomy (CEA)
Surgical Revascularization- Carotid Endarterectomy (CEA)
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Carotid Angioplasty and Stenting (CAS)
Surgical Revascularization- Carotid Angioplasty and Stenting (CAS)
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Control Group- Medical Management
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Measurement of change in cerebral blood flow from pre-op/baseline to 1 month post-operatively.
Tijdsspanne: preoperative/baseline and 1 month postoperative/from baseline
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Quantitative flow MRA studies will be performed pre-operative and postoperative for those undergoing carotid revascularization surgery.
Those not undergoing surgery will have this test upon study enrollment and approximately 1 month from study enrollment date.
|
preoperative/baseline and 1 month postoperative/from baseline
|
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Mini Mental Status Exam
Tijdsspanne: Pre-operative/baseline
|
A standardized cognitive measure
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Pre-operative/baseline
|
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Trail Making- Part A
Tijdsspanne: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
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Standardized cognitive measure that assesses verbal fluency
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Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
|
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Trail Making- Part B
Tijdsspanne: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
|
Standardized cognitive measure that assesses executive functioning
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Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
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Hopkins Verbal Learning Test (HVLT)
Tijdsspanne: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
|
Standardized measure to assess new learning and memory
|
Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
|
|
D-KEFS Verbal Fluency Test (FAS)
Tijdsspanne: Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
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Standardized measure to assess letter fluency
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Preoperative/baseline, 1 month postoperative/post baseline, 6 months postoperative/post baseline, and 1 year postoperative/post baseline
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Medewerkers en onderzoekers
Sponsor
Onderzoekers
- Hoofdonderzoeker: Zoher Ghogawala, MD, Lahey Clinic, Inc.
Publicaties en nuttige links
Algemene publicaties
- Halliday A, Mansfield A, Marro J, Peto C, Peto R, Potter J, Thomas D; MRC Asymptomatic Carotid Surgery Trial (ACST) Collaborative Group. Prevention of disabling and fatal strokes by successful carotid endarterectomy in patients without recent neurological symptoms: randomised controlled trial. Lancet. 2004 May 8;363(9420):1491-502. doi: 10.1016/S0140-6736(04)16146-1. Erratum In: Lancet. 2004 Jul 31;364(9432):416.
- Rothwell PM, Goldstein LB. Carotid endarterectomy for asymptomatic carotid stenosis: asymptomatic carotid surgery trial. Stroke. 2004 Oct;35(10):2425-7. doi: 10.1161/01.STR.0000141706.50170.a7. Epub 2004 Aug 26. No abstract available.
Studie record data
Bestudeer belangrijke data
Studie start
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Schatting)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- 2013-009
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