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Value of CT Perfusion for Collateral Status Assessment in Patients with Acute Ischemic Stroke. Diagnostics (Basel) 2022; 12:diagnostics12123014. [PMID: 36553021 PMCID: PMC9777468 DOI: 10.3390/diagnostics12123014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/24/2022] [Accepted: 11/27/2022] [Indexed: 12/04/2022] Open
Abstract
Good collateral status in acute ischemic stroke patients is an important indicator for good outcomes. Perfusion imaging potentially allows for the simultaneous assessment of local perfusion and collateral status. We combined multiple CTP parameters to evaluate a CTP-based collateral score. We included 85 patients with a baseline CTP and single-phase CTA images from the MR CLEAN Registry. We evaluated patients' CTP parameters, including relative CBVs and tissue volumes with several time-to-maximum ranges, to be candidates for a CTP-based collateral score. The score candidate with the strongest association with CTA-based collateral score and a 90-day mRS was included for further analyses. We assessed the association of the CTP-based collateral score with the functional outcome (mRS 0-2) by analyzing three regression models: baseline prognostic factors (model 1), model 1 including the CTA-based collateral score (model 2), and model 1 including the CTP-based collateral score (model 3). The model performance was evaluated using C-statistic. Among the CTP-based collateral score candidates, relative CBVs with a time-to-maximum of 6-10 s showed a significant association with CTA-based collateral scores (p = 0.02) and mRS (p = 0.05) and was therefore selected for further analysis. Model 3 most accurately predicted favorable outcomes (C-statistic = 0.86, 95% CI: 0.77-0.94) although differences between regression models were not statistically significant. We introduced a CTP-based collateral score, which is significantly associated with functional outcome and may serve as an alternative collateral measure in settings where MR imaging is not feasible.
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Zhao H, Wang B, Xu G, Dong Y, Dong Q, Cao W. Collateral grade of the Willis' circle predicts outcomes of acute intracranial internal carotid artery occlusion before thrombectomy. Brain Behav 2019; 9:e01452. [PMID: 31696661 PMCID: PMC6908856 DOI: 10.1002/brb3.1452] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 08/21/2019] [Accepted: 09/14/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND AND PURPOSE Endovascular mechanical thrombectomy (EVMT) shows significant promise in improving acute ischemic stroke (AIS) with proximal artery occlusion, but outcomes have been variable. We explored the patients treated by thrombectomy to investigate the association between a favorable clinical outcome of EVMT in intracranial internal carotid artery occlusion (iICAO) and a set of predictors. METHODS A total of 38 iICAO patients treated by EVMTs were analyzed. Primary collateral grades (PCG) at baseline based on the integrity of Willis' circle were categorized into three degrees. The favorable outcomes, measured by modified Rankin scale (mRS), were defined as ≤2 at 90 days. The reperfusion was one of the most important confounders, defined as modified thrombolysis in cerebral infarction (mTICI) ≥ 2b. The other risk factors included demographic characteristics, vascular risk factors, stroke severity, procedural EVMT, and PCG at baseline was adjusted to reveal the association with favorable outcomes. RESULTS Of 38 iICAO patients, 65.8% (25 in 38) achieved reperfusion. However, only 31.6% (12/38) achieved favorable outcomes at 90 days. With a PCG3, 61.5% of them achieved favorable outcomes, while only 37.5% of those with PCG2 and PCG1 achieved favorable outcomes (p = .003). In multivariable logistic regression, PCG was revealed as a predictor for favorable outcomes (OR 5.278, p = .019) after adjusting the reperfusion and other factors. CONCLUSIONS The PCG based on the integrity of Willis' circle might be an underlying predictor of the prognosis of AIS in patients with iICAO after EVMT. The function of intact anterior communicating artery (AcoA) and ipsilateral posterior communicating artery (PcoA) in favoring prognosis of the iICAO patients might need to be validation in future study.
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Affiliation(s)
- Hongchen Zhao
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Baolin Wang
- The Third Peoples' Hospital of Qingdao, Qingdao, China
| | | | - Yi Dong
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Qiang Dong
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Wenjie Cao
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
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Saqqur M, Khan K, Derksen C, Alexandrov A, Shuaib A. Transcranial Doppler and Transcranial Color Duplex in Defining Collateral Cerebral Blood Flow. J Neuroimaging 2018; 28:455-476. [DOI: 10.1111/jon.12535] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 06/18/2018] [Indexed: 12/31/2022] Open
Affiliation(s)
- Maher Saqqur
- Division of Neurology, Department of Medicine; University of Alberta; Edmonton AB Canada
- Neuroscience Institute; Hamad General Hospital Doha Qatar
| | - Khurshid Khan
- Division of Neurology, Department of Medicine; University of Alberta; Edmonton AB Canada
| | - Carol Derksen
- Division of Neurology, Department of Medicine; University of Alberta; Edmonton AB Canada
| | - Andrei Alexandrov
- Department of Neurology; University of Tennessee Health Science Center; Memphis TN USA
| | - Ashfaq Shuaib
- Division of Neurology, Department of Medicine; University of Alberta; Edmonton AB Canada
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Woodley of Menie MA, Reeve CL, Kanazawa S, Meisenberg G, Fernandes HB, Cabeza de Baca T. Contemporary phenotypic selection on intelligence is (mostly) directional: An analysis of three, population representative samples. INTELLIGENCE 2016. [DOI: 10.1016/j.intell.2016.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Sundaram S, Kannoth S, Thomas B, Sarma PS, Sylaja PN. Collateral Assessment by CT Angiography as a Predictor of Outcome in Symptomatic Cervical Internal Carotid Artery Occlusion. AJNR Am J Neuroradiol 2016; 38:52-57. [PMID: 27765736 DOI: 10.3174/ajnr.a4957] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 08/14/2016] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Cervical internal carotid artery occlusion can present with varied clinical manifestations such as transient ischemic attack, stroke, and chronic ocular ischemia, or can be asymptomatic. The outcome in these patients is considerably influenced by cerebral hemodynamic compensatory adaptation of the intracranial collateral pathways. Our aim was to study whether collateral circulation as assessed by CT angiography can predict 3-month outcome and initial stroke severity in patients with symptomatic cervical ICA occlusion. MATERIALS AND METHODS This was a retrospective study of 65 patients with symptomatic cervical ICA occlusion from January 2011 to December 2013. The collateral vessels (anterior and posterior communicating arteries, ophthalmic artery, and leptomeningeal arteries) were assessed by CTA. The outcome at 3 months was defined as poor if the modified Rankin Scale score was ≥3. RESULTS The mean age of subjects was 57 ± 11.6 years (range, 32-80 years), and 92% were men. Thirty-three (50.8%) patients had poor outcome. Absence of the ipsilateral ophthalmic artery, poor leptomeningeal collaterals, and <2 collaterals were predictors of stroke severity at onset and poor 3-month outcome in univariate analysis. In the multiple logistic regression analysis, inadequate flow through the secondary collaterals (ipsilateral ophthalmic artery or leptomeningeal collaterals; OR, 4.5; 95% CI, 1.4-14.9; P = .01) and higher NIHSS score at stroke onset (OR, 19.2; 95% CI, 2.2-166.2; P = .007) independently predicted poor outcome at 3 months. CONCLUSIONS Assessment of collateral circulation with CTA can be a useful predictor of 3-month outcome in patients with symptomatic cervical ICA occlusion.
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Affiliation(s)
- S Sundaram
- From the Department of Neurology (S.S., P.N.S.), Comprehensive Stroke Care Program
| | - S Kannoth
- Department of Imaging Sciences and Interventional Radiology (S.K., B.T.)
| | - B Thomas
- Department of Imaging Sciences and Interventional Radiology (S.K., B.T.)
| | - P S Sarma
- Achutha Menon Centre for Health Science Studies (P.S.S.), Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - P N Sylaja
- From the Department of Neurology (S.S., P.N.S.), Comprehensive Stroke Care Program
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Barroso B, Demasles S, Krim E, Marasescu R, Miquel M, Bonnan M. Multiple spontaneous cervical artery dissections: A transient arteriopathy with good long-term prognosis. Int J Stroke 2016; 11:NP10. [PMID: 26763032 DOI: 10.1177/1747493015615131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Bruno Barroso
- Stroke-Unit and Neurology Department, François Mitterrand Hospital, Pau Cedex, France
| | - Stephanie Demasles
- Stroke-Unit and Neurology Department, François Mitterrand Hospital, Pau Cedex, France
| | - Elsa Krim
- Stroke-Unit and Neurology Department, François Mitterrand Hospital, Pau Cedex, France
| | - Raluca Marasescu
- Stroke-Unit and Neurology Department, François Mitterrand Hospital, Pau Cedex, France
| | - Marie Miquel
- Stroke-Unit and Neurology Department, François Mitterrand Hospital, Pau Cedex, France
| | - Mickael Bonnan
- Stroke-Unit and Neurology Department, François Mitterrand Hospital, Pau Cedex, France
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Biller J, Sacco RL, Albuquerque FC, Demaerschalk BM, Fayad P, Long PH, Noorollah LD, Panagos PD, Schievink WI, Schwartz NE, Shuaib A, Thaler DE, Tirschwell DL. Cervical arterial dissections and association with cervical manipulative therapy: a statement for healthcare professionals from the american heart association/american stroke association. Stroke 2014; 45:3155-74. [PMID: 25104849 DOI: 10.1161/str.0000000000000016] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PURPOSE Cervical artery dissections (CDs) are among the most common causes of stroke in young and middle-aged adults. The aim of this scientific statement is to review the current state of evidence on the diagnosis and management of CDs and their statistical association with cervical manipulative therapy (CMT). In some forms of CMT, a high or low amplitude thrust is applied to the cervical spine by a healthcare professional. METHODS Members of the writing group were appointed by the American Heart Association Stroke Council's Scientific Statements Oversight Committee and the American Heart Association's Manuscript Oversight Committee. Members were assigned topics relevant to their areas of expertise and reviewed appropriate literature, references to published clinical and epidemiology studies, morbidity and mortality reports, clinical and public health guidelines, authoritative statements, personal files, and expert opinion to summarize existing evidence and to indicate gaps in current knowledge. RESULTS Patients with CD may present with unilateral headaches, posterior cervical pain, or cerebral or retinal ischemia (transient ischemic or strokes) attributable mainly to artery-artery embolism, CD cranial nerve palsies, oculosympathetic palsy, or pulsatile tinnitus. Diagnosis of CD depends on a thorough history, physical examination, and targeted ancillary investigations. Although the role of trivial trauma is debatable, mechanical forces can lead to intimal injuries of the vertebral arteries and internal carotid arteries and result in CD. Disability levels vary among CD patients with many having good outcomes, but serious neurological sequelae can occur. No evidence-based guidelines are currently available to endorse best management strategies for CDs. Antiplatelet and anticoagulant treatments are both used for prevention of local thrombus and secondary embolism. Case-control and other articles have suggested an epidemiologic association between CD, particularly vertebral artery dissection, and CMT. It is unclear whether this is due to lack of recognition of preexisting CD in these patients or due to trauma caused by CMT. Ultrasonography, computed tomographic angiography, and magnetic resonance imaging with magnetic resonance angiography are useful in the diagnosis of CD. Follow-up neuroimaging is preferentially done with noninvasive modalities, but we suggest that no single test should be seen as the gold standard. CONCLUSIONS CD is an important cause of ischemic stroke in young and middle-aged patients. CD is most prevalent in the upper cervical spine and can involve the internal carotid artery or vertebral artery. Although current biomechanical evidence is insufficient to establish the claim that CMT causes CD, clinical reports suggest that mechanical forces play a role in a considerable number of CDs and most population controlled studies have found an association between CMT and VAD stroke in young patients. Although the incidence of CMT-associated CD in patients who have previously received CMT is not well established, and probably low, practitioners should strongly consider the possibility of CD as a presenting symptom, and patients should be informed of the statistical association between CD and CMT prior to undergoing manipulation of the cervical spine.
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Correa E, Martinez B. Traumatic dissection of the internal carotid artery: simultaneous infarct of optic nerve and brain. Clin Case Rep 2014; 2:51-6. [PMID: 25356244 PMCID: PMC4184630 DOI: 10.1002/ccr3.53] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 01/05/2014] [Accepted: 01/25/2014] [Indexed: 11/10/2022] Open
Abstract
KEY CLINICAL MESSAGE Traumatic intracranial internal carotid artery dissection is a rare but significant cause of stroke in patients in their forties, leading to high morbidity and mortality. Simultaneous ischemic stroke and optic nerve infarction can occur. Clinical suspicion of dissection is determining in the acute management.
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Affiliation(s)
- Edgar Correa
- Department of Neurology, Andrade Marín Hospital, San Francisco of Quito UniversityQuito, Ecuador
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Williamson T, Eliasziw M, Fick GH. Log-binomial models: exploring failed convergence. Emerg Themes Epidemiol 2013; 10:14. [PMID: 24330636 PMCID: PMC3909339 DOI: 10.1186/1742-7622-10-14] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 12/05/2013] [Indexed: 11/16/2022] Open
Abstract
Background Relative risk is a summary metric that is commonly used in epidemiological investigations. Increasingly, epidemiologists are using log-binomial models to study the impact of a set of predictor variables on a single binary outcome, as they naturally offer relative risks. However, standard statistical software may report failed convergence when attempting to fit log-binomial models in certain settings. The methods that have been proposed in the literature for dealing with failed convergence use approximate solutions to avoid the issue. This research looks directly at the log-likelihood function for the simplest log-binomial model where failed convergence has been observed, a model with a single linear predictor with three levels. The possible causes of failed convergence are explored and potential solutions are presented for some cases. Results Among the principal causes is a failure of the fitting algorithm to converge despite the log-likelihood function having a single finite maximum. Despite these limitations, log-binomial models are a viable option for epidemiologists wishing to describe the relationship between a set of predictors and a binary outcome where relative risk is the desired summary measure. Conclusions Epidemiologists are encouraged to continue to use log-binomial models and advocate for improvements to the fitting algorithms to promote the widespread use of log-binomial models.
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Affiliation(s)
- Tyler Williamson
- Departments of Family Medicine and Public Health Sciences, Queen's University, Kingston, ON, Canada.
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Abstract
A postpartum four-vessel cervical artery dissection with no stroke is reported. This transient vasculopathy took place in the autoimmune context of the HELLP syndrome combined with the reversible posterior leucoencephalopathy syndrome. Correlations between the clinical, radiological and biological entities are discussed.
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Affiliation(s)
- Bruno Barroso
- Stroke Unit, Department of Neurology, F. Mitterrand Hospital, Pau, France
| | - Stéphanie Demasles
- Stroke Unit, Department of Neurology, F. Mitterrand Hospital, Pau, France
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Abstract
Ischaemic stroke results from acute arterial occlusion leading to focal hypoperfusion. Thrombolysis is the only proven treatment. Advanced neuroimaging techniques allow a detailed assessment of the cerebral circulation in patients with acute stroke, and provide information about the status of collateral vessels and collateral blood flow, which could attenuate the effects of arterial occlusion. Imaging of the brain and vessels has shown that collateral flow can sustain brain tissue for hours after the occlusion of major arteries to the brain, and the augmentation or maintenance of collateral flow is therefore a potential therapeutic target. Several interventions that might augment collateral blood flow are being investigated.
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Bornak A, Milner R. Diagnosing and Treating Atypical Arterial Pathologies of Aortic Arch Vessels: Dissection and Fibromuscular Dysplasia. Semin Vasc Surg 2011; 24:36-43. [DOI: 10.1053/j.semvascsurg.2011.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Conforto AB. Multicenter studies to shed light on fibromuscular displasia and cervical artery dissection. ARQUIVOS DE NEURO-PSIQUIATRIA 2011; 69:275-276. [PMID: 21625749 DOI: 10.1590/s0004-282x2011000300001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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