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Carraro do Nascimento V, de Villiers L, Dhillon PS, Domitrovic L, Sesnan G, Leblanc JP, Ninnes L, Hughes I, Rice H. Transradial versus transfemoral access for diagnostic cerebral angiography: frequency of acute MRI findings in 500 consecutive patients at a single center. J Neurointerv Surg 2024:jnis-2024-021472. [PMID: 38503510 DOI: 10.1136/jnis-2024-021472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 03/04/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND The frequency of clinically symptomatic and asymptomatic diffusion-weighted imaging (DWI) hyperintense lesions and their correlation with the transradial artery (TRA) approach is unclear. OBJECTIVE To assess the frequency of abnormal diffusion restriction foci on DWI following cerebral angiography (digital subtraction angiography (DSA)) with the TRA or transfemoral artery (TFA) approach and identify predictors of DWI restriction foci. METHODS We analysed data from consecutive diagnostic cerebral angiograms obtained between January 2021 and October 2023 at a single tertiary center. MRI DWI was performed 2 hours after DSA. Patients underwent neurological assessment periprocedurally, as well as prior to discharge. RESULTS 500 patients were analysed; 277 (55%) procedures were performed via TRA and 223 (45%) via TFA. Overall, 74 (14.8%) patients had abnormal findings in the postprocedure MRI DWI. A higher incidence of positive DWI findings was noted in the TRA group, with 46 (16.6%) patients, compared with 28 (12.6%) in the TFA group (P=0.21). Symptomatic events occurred in seven (2.5%) of the TRA group and in two (0.9%) of the TFA cohort (P=0.31). At 60 days, the neurological deficit rate was one (0.4%) for the TRA group and one (0.4%) for the TFA group. Procedure time was the only significant predictor of DWI restriction (OR=1.04 per minute; P=0.0001). CONCLUSION Although there were more symptomatic or asymptomatic embolic events with TRA than with the TFA approach following elective cerebral angiography, this was not significantly different. We recommend the choice of vascular access based on patient anatomy and characteristics, aimed at improving care through enhanced safety.
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Affiliation(s)
| | - Laetitia de Villiers
- Department of Interventional Neuroradiology, Gold Coast University Hospital, Gold Coast, Queensland, Australia
| | - Permesh Singh Dhillon
- Department of Interventional Neuroradiology, University of Nottingham Faculty of Medicine and Health Sciences, Nottingham, UK
| | - Luis Domitrovic
- Department of Interventional Neuroradiology, Liverpool Hospital, Liverpool, New South Wales, Australia
| | - Genevieve Sesnan
- Department of Interventional Neuroradiology, Gold Coast University Hospital, Gold Coast, Queensland, Australia
| | - Jean-Philippe Leblanc
- Department of Interventional Neuroradiology, Gold Coast University Hospital, Gold Coast, Queensland, Australia
| | - Louise Ninnes
- Department of Interventional Neuroradiology, Gold Coast University Hospital, Gold Coast, Queensland, Australia
| | - Ian Hughes
- Office for Research Governance and Development, Gold Coast University Hospital, Southport, Queensland, Australia
| | - Hal Rice
- Department of Interventional Neuroradiology, Gold Coast University Hospital, Gold Coast, Queensland, Australia
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2
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Habtezghi AB, Ghozy S, Bilgin C, Kobeissi H, Kadirvel R, Kallmes DF. DWI-Detected Ischemic Lesions after Endovascular Treatment for Cerebral Aneurysms: An Updated Systematic Review and Meta-analysis. AJNR Am J Neuroradiol 2023; 44:1256-1261. [PMID: 37827721 PMCID: PMC10631525 DOI: 10.3174/ajnr.a8024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 09/08/2023] [Indexed: 10/14/2023]
Abstract
BACKGROUND AND PURPOSE DWI-detected ischemic lesions are potential complications of endovascular procedures that are performed to treat intracranial aneurysms. We completed a systematic review and meta-analysis to identify the occurrence of DWI-detected ischemic lesions after endovascular treatment for intracranial aneurysms. MATERIALS AND METHODS A systematic literature search of PubMed, the Web of Science, EMBASE, and Scopus between January 2000 and June 2022 of post-endovascular procedures for intracranial aneurysm studies was conducted using the Nested Knowledge AutoLit software. The main outcome was DWI-detected ischemic lesions within 5 days of the procedures. Information regarding associated risk factors such as the type of procedure, patient demographics, and aneurysm characteristics was also collected. RESULTS Twenty-nine studies with 2686 patients were included. The overall incidence of DWI ischemic lesions was 47.0% (95% CI, 39.6%-55.8%). The highest rate of lesions was seen with flow diversion at 62.4% (95% CI, 48.4%-80.5%), followed by complex procedures at 49.3% (95% CI, 29.5%-82.1%), stent-assisted coiling at 47.5% (95% CI, 34.6%-65.3%), simple coiling at 47.1% (95% CI, 35.7%-62.3%), and balloon-assisted coiling at 37.0% (95% CI, 28.3%-48.4%). The differences among different techniques were not statistically significant; however, there was significant heterogeneity and a significant risk of publication bias among included studies. CONCLUSIONS Many patients who undergo endovascular procedures for intracranial aneurysms present with new postprocedural DWI-detected ischemic lesions, regardless of the endovascular procedure used. Future studies and meta-analyses are needed to investigate early and long-term outcomes of such small infarcts.
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Affiliation(s)
- Abiel Berhe Habtezghi
- From the Department of Radiology (A.B.H., S.G., C.B., H.K., R.K., D.F.K.), Mayo Clinic, Rochester, Minnesota
| | - Sherief Ghozy
- From the Department of Radiology (A.B.H., S.G., C.B., H.K., R.K., D.F.K.), Mayo Clinic, Rochester, Minnesota
| | - Cem Bilgin
- From the Department of Radiology (A.B.H., S.G., C.B., H.K., R.K., D.F.K.), Mayo Clinic, Rochester, Minnesota
| | - Hassan Kobeissi
- From the Department of Radiology (A.B.H., S.G., C.B., H.K., R.K., D.F.K.), Mayo Clinic, Rochester, Minnesota
| | - Ramanathan Kadirvel
- From the Department of Radiology (A.B.H., S.G., C.B., H.K., R.K., D.F.K.), Mayo Clinic, Rochester, Minnesota
- Department of Neurologic Surgery (R.K.), Mayo Clinic, Rochester, Minnesota
| | - David F Kallmes
- From the Department of Radiology (A.B.H., S.G., C.B., H.K., R.K., D.F.K.), Mayo Clinic, Rochester, Minnesota
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3
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Verburgt E, Janssen E, Jacob MA, Cai M, Ter Telgte A, Wiegertjes K, Kessels RPC, Norris DG, Marques J, Duering M, Tuladhar AM, De Leeuw FE. Role of small acute hyperintense lesions in long-term progression of cerebral small vessel disease and clinical outcome: a 14-year follow-up study. J Neurol Neurosurg Psychiatry 2023; 94:144. [PMID: 36270793 DOI: 10.1136/jnnp-2022-330091] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Small hyperintense lesions are found on diffusion-weighted imaging (DWI) in patients with sporadic small vessel disease (SVD). Their exact role in SVD progression remains unclear due to their asymptomatic and transient nature. The main objective is to investigate the role of DWI+lesions in the radiological progression of SVD and their relationship with clinical outcomes. METHODS Participants with SVD were included from the Radboud University Nijmegen Diffusion tensor MRI Cohort. DWI+lesions were assessed on four time points over 14 years. Outcome measures included neuroimaging markers of SVD, cognitive performance and clinical outcomes, including stroke, all-cause dementia and all-cause mortality. Linear mixed-effect models and Cox regression models were used to examine the outcome measures in participants with a DWI+lesion (DWI+) and those without a DWI+lesion (DWI-). RESULTS DWI+lesions were present in 45 out of 503 (8.9%) participants (mean age: 66.7 years (SD=8.3)). Participants with DWI+lesions and at least one follow-up (n=33) had higher white matter hyperintensity progression rates (β=0.36, 95% CI=0.05 to 0.68, p=0.023), more incident lacunes (incidence rate ratio=2.88, 95% CI=1.80 to 4.67, p<0.001) and greater cognitive decline (β=-0.03, 95% CI=-0.05 to -0.01, p=0.006) during a median follow-up of 13.2 (IQR: 8.8-13.8) years compared with DWI- participants. No differences were found in risk of all-cause mortality, stroke or dementia. CONCLUSION Presence of a DWI+lesion in patients with SVD is associated with greater radiological progression of SVD and cognitive decline compared with patients without DWI+lesions.
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Affiliation(s)
- Esmée Verburgt
- Department of Neurology, Radboudumc, Nijmegen, Gelderland, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Esther Janssen
- Department of Neurology, Radboudumc, Nijmegen, Gelderland, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Mina A Jacob
- Department of Neurology, Radboudumc, Nijmegen, Gelderland, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Mengfei Cai
- Department of Neurology, Guangdong Provincial People's Hospital, Guangzhou, Guangdong, China
| | - Annemieke Ter Telgte
- Research Center on Vascular Ageing and Stroke (VASCage GmbH), Innsbruck, Austria
| | - Kim Wiegertjes
- Department of Neurology, Radboudumc, Nijmegen, Gelderland, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Roy P C Kessels
- Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands.,Vincent Van Gogh Instituut, Venray, Limburg, The Netherlands
| | - David G Norris
- Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Jose Marques
- Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Marco Duering
- Medical Image Analysis Center (MIAC AG) and qbig, Department of Biomedical Engineering, University of Basel, Basel, Basel-Stadt, Switzerland
| | - Anil M Tuladhar
- Department of Neurology, Radboudumc, Nijmegen, Gelderland, The Netherlands.,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
| | - Frank-Erik De Leeuw
- Department of Neurology, Radboudumc, Nijmegen, Gelderland, The Netherlands .,Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, Gelderland, The Netherlands
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Clancy U, Gilmartin D, Jochems ACC, Knox L, Doubal FN, Wardlaw JM. Neuropsychiatric symptoms associated with cerebral small vessel disease: a systematic review and meta-analysis. Lancet Psychiatry 2021; 8:225-236. [PMID: 33539776 DOI: 10.1016/s2215-0366(20)30431-4] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/09/2020] [Accepted: 09/23/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND Cerebral small vessel disease, a common cause of vascular dementia, is often considered clinically silent before dementia or stroke become apparent. However, some individuals have subtle symptoms associated with acute MRI lesions. We aimed to determine whether neuropsychiatric and cognitive symptoms vary according to small vessel disease burden. METHODS In this systematic review and meta-analysis, we searched MEDLINE, EMBASE, and PsycINFO for articles published in any language from database inception to Jan 24, 2020. We searched for studies assessing anxiety, apathy, delirium, emotional lability, fatigue, personality change, psychosis, dementia-related behavioural symptoms or cognitive symptoms (including subjective memory complaints), and radiological features of cerebral small vessel disease. We extracted reported odds ratios (OR), standardised mean differences (SMD), and correlations, stratified outcomes by disease severity or symptom presence or absence, and pooled data using random-effects meta-analyses, reporting adjusted findings when possible. We assessed the bias on included studies using the Risk of Bias for Non-randomized Studies tool. This study is registered with PROSPERO, CRD42018096673. FINDINGS Of 7119 papers identified, 81 studies including 79 cohorts in total were eligible for inclusion (n=21 730 participants, mean age 69·2 years). Of these 81 studies, 45 (8120 participants) reported effect estimates. We found associations between worse white matter hyperintensity (WMH) severity and apathy (OR 1·41, 95% CI 1·05-1·89) and the adjusted SMD in apathy score between WMH severities was 0·38 (95% CI 0·15-0·61). Worse WMH severity was also associated with delirium (adjusted OR 2·9, 95% CI 1·12-7·55) and fatigue (unadjusted OR 1·63, 95% CI 1·20-2·22). WMHs were not consistently associated with subjective memory complaints (OR 1·34, 95% CI 0·61-2·94) and unadjusted SMD for WMH severity between these groups was 0·08 (95% CI -0·31 to 0·47). Anxiety, dementia-related behaviours, emotional lability, and psychosis were too varied or sparse for meta-analysis; these factors were reviewed narratively. Overall heterogeneity varied from 0% to 79%. Only five studies had a low risk of bias across all domains. INTERPRETATION Apathy, fatigue, and delirium associated independently with worse WMH, whereas subjective cognitive complaints did not. The association of anxiety, dementia-related behaviours, emotional lability, and psychosis with cerebral small vessel disease require further investigation. These symptoms should be assessed longitudinally to improve early clinical detection of small vessel disease and enable prevention trials to happen early in the disease course, long before cognition declines. FUNDING Chief Scientist Office of the Scottish Government, UK Dementia Research Institute, Fondation Leducq, Stroke Association Garfield-Weston Foundation, Alzheimer's Society, and National Health Service Research Scotland.
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Affiliation(s)
- Una Clancy
- Centre for Clinical Brain Sciences and UK Dementia Research Institute, University of Edinburgh, Edinburgh, UK
| | - Daniel Gilmartin
- Department of Geriatric Medicine, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, UK
| | - Angela C C Jochems
- Centre for Clinical Brain Sciences and UK Dementia Research Institute, University of Edinburgh, Edinburgh, UK
| | - Lucy Knox
- Department of Medicine, Borders General Hospital, NHS Borders, Melrose, UK
| | - Fergus N Doubal
- Centre for Clinical Brain Sciences and UK Dementia Research Institute, University of Edinburgh, Edinburgh, UK
| | - Joanna M Wardlaw
- Centre for Clinical Brain Sciences and UK Dementia Research Institute, University of Edinburgh, Edinburgh, UK.
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Abstract
ABSTRACT Cerebral small vessel disease (SVD) is a common global brain disease that causes cognitive impairment, ischemic or hemorrhagic stroke, problems with mobility, and neuropsychiatric symptoms. The brain damage, seen as focal white and deep grey matter lesions on brain magnetic resonance imaging (MRI) or computed tomography (CT), typically accumulates "covertly" and may reach an advanced state before being detected incidentally on brain scanning or causing symptoms. Patients have typically presented to different clinical services or been recruited into research focused on one clinical manifestation, perhaps explaining a lack of awareness, until recently, of the full range and complexity of SVD.In this review, we discuss the varied clinical presentations, established and emerging risk factors, relationship to SVD features on MRI or CT, and the current state of knowledge on the effectiveness of a wide range of pharmacological and lifestyle interventions. The core message is that effective assessment and clinical management of patients with SVD, as well as future advances in diagnosis, care, and treatment, will require a more "joined-up"' approach. This approach should integrate clinical expertise in stroke neurology, cognitive, and physical dysfunctions. It requires more clinical trials in order to improve pharmacological interventions, lifestyle and dietary modifications. A deeper understanding of the pathophysiology of SVD is required to steer the identification of novel interventions. An essential prerequisite to accelerating clinical trials is to improve the consistency, and standardization of clinical, cognitive and neuroimaging endpoints.
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6
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Clancy U, Garcia DJ, Stringer MS, Thrippleton MJ, Valdés-Hernández MC, Wiseman S, Hamilton OK, Chappell FM, Brown R, Blair GW, Hewins W, Sleight E, Ballerini L, Bastin ME, Maniega SM, MacGillivray T, Hetherington K, Hamid C, Arteaga C, Morgan AG, Manning C, Backhouse E, Hamilton I, Job D, Marshall I, Doubal FN, Wardlaw JM. Rationale and design of a longitudinal study of cerebral small vessel diseases, clinical and imaging outcomes in patients presenting with mild ischaemic stroke: Mild Stroke Study 3. Eur Stroke J 2020; 6:81-88. [PMID: 33817338 PMCID: PMC7995323 DOI: 10.1177/2396987320929617] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 04/14/2020] [Indexed: 12/21/2022] Open
Abstract
Background Cerebral small vessel disease is a major cause of dementia and stroke, visible on brain magnetic resonance imaging. Recent data suggest that small vessel disease lesions may be dynamic, damage extends into normal-appearing brain and microvascular dysfunctions include abnormal blood–brain barrier leakage, vasoreactivity and pulsatility, but much remains unknown regarding underlying pathophysiology, symptoms, clinical features and risk factors of small vessel disease. Patients and Methods: The Mild Stroke Study 3 is a prospective observational cohort study to identify risk factors for and clinical implications of small vessel disease progression and regression among up to 300 adults with non-disabling stroke. We perform detailed serial clinical, cognitive, lifestyle, physiological, retinal and brain magnetic resonance imaging assessments over one year; we assess cerebrovascular reactivity, blood flow, pulsatility and blood–brain barrier leakage on magnetic resonance imaging at baseline; we follow up to four years by post and phone. The study is registered ISRCTN 12113543. Summary Factors which influence direction and rate of change of small vessel disease lesions are poorly understood. We investigate the role of small vessel dysfunction using advanced serial neuroimaging in a deeply phenotyped cohort to increase understanding of the natural history of small vessel disease, identify those at highest risk of early disease progression or regression and uncover novel targets for small vessel disease prevention and therapy.
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Affiliation(s)
- Una Clancy
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | | | - Michael S Stringer
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | | | | | - Stewart Wiseman
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Olivia Kl Hamilton
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | | | - Rosalind Brown
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Gordon W Blair
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Will Hewins
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Emilie Sleight
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Lucia Ballerini
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Mark E Bastin
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | | | - Tom MacGillivray
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | | | - Charlene Hamid
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Carmen Arteaga
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Alasdair G Morgan
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Cameron Manning
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Ellen Backhouse
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Iona Hamilton
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Dominic Job
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Ian Marshall
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Fergus N Doubal
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Joanna M Wardlaw
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
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7
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Marchese N, Copetti M, Inchingolo V, Popolizio T, Fontana A, Simeone A, Vigna C. Cerebral Infarcts After Coronary Angiography and Percutaneous Coronary Intervention: A Prospective Propensity-Score-Adjusted Comparison of Right Radial, Left Radial, and Femoral Approaches. CARDIOVASCULAR REVASCULARIZATION MEDICINE 2019; 21:882-887. [PMID: 31761638 DOI: 10.1016/j.carrev.2019.11.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/07/2019] [Accepted: 11/11/2019] [Indexed: 11/18/2022]
Abstract
BACKGROUND New cerebral infarcts (CIs) detected at magnetic resonance imaging (MRI) are reported after cardiac procedures. Clinical and procedural aspects are implicated as potential causal factors. The aim of this study was to evaluate the incidence of new CIs after coronary angiography and percutaneous coronary intervention according to the arterial access site. METHODS 180 patients undergoing elective coronary angiography were studied with cerebral MRI the day before and the day after the procedure. Unadjusted and propensity score (PS) analyses were performed comparing the occurrence of CIs in right radial (RR), left radial (LR) and transfemoral (TF) access groups. RESULTS New CIs were observed in 14 patients (7.8% of the total sample, one with neurological sequelae). CIs were detected in 15.5% vs 4.9% vs 3.3% of RR, LR and TF groups, respectively (p = .026). In PS adjusted analyses, the RR approach was associated with more CIs compared with the TF approach (odds ratio [OR] estimate from logistic regression adjusted by PS quartiles: 0.158; 95% confidence interval: 0.031 to 0.814; p = .027) and the LR approach (OR: 0.266; 95% confidence interval: 0.066 to 1.080; p = .064). In a secondary analysis, a comparison of RR vs non-RR approach (TF + LR) was performed, showing that post-procedural CIs were more frequent in the RR group (OR: 0.170; 95% confidence interval: 0.050 to 0.574; p = .004). CONCLUSIONS Our study suggests that the RR approach may be associated with a higher rate of new CIs after coronary angiography compared with LR and TF approaches.
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Affiliation(s)
- Nicola Marchese
- Unit of Cardiology, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy.
| | - Massimiliano Copetti
- Unit of Biostatistics, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Vincenzo Inchingolo
- Unit of Neurology, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Teresa Popolizio
- Unit of Radiology, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Andrea Fontana
- Unit of Biostatistics, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Annalisa Simeone
- Unit of Neurology, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Carlo Vigna
- Unit of Cardiology, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
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8
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Lee SH, Jang MU, Kang J, Kim YJ, Kim C, Sohn JH, Yang J, Jeon JP, Cho Y, Choi HJ. Impact of Reducing the Procedure Time on Thromboembolism After Coil Embolization of Cerebral Aneurysms. Front Neurol 2019; 9:1125. [PMID: 30619075 PMCID: PMC6305340 DOI: 10.3389/fneur.2018.01125] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 12/07/2018] [Indexed: 11/29/2022] Open
Abstract
Background: There is still controversy regarding which procedure-related factors affect the occurrence of periprocedural thromboembolism. This study aimed to investigate which procedure-related risk factors can be modified to prevent adverse thromboembolic events after coil embolization of intracranial aneurysm. Methods: Using a single-center database, we retrospectively identified a consecutive series of patients with symptomatic and asymptomatic cerebral aneurysms treated with coil embolization. We evaluated the following procedure-related factors: procedure time, procedure methods (simple coiling, stent-assisted coiling, and use of multiple microcatheters), and number of coils inserted. The primary outcome was the development of thromboembolism before and after coil embolization confirmed by diffusion-weighted imaging (DWI) irrespective of the location of the procedure. Pearson's chi-square, Student's t-test, multivariable logistic regression analysis, and sensitivity analysis with multinomial logistic regression analysis were used in the statistical analyses. Results: Of 180 cases enrolled, 146 (81.1%) had evidences of thromboembolism confirmed by DWI, and 13 (7.2%) had neurologic symptoms. Among the documented modifiable procedure-related factors, every 10 min increase in the procedure time was independently associated with the risk of thromboembolism, after adjusting the analysis (adjusted odds ratio 1.11; 95% confidence interval 1.01–1.21). The coiling methods, use of multiple catheters, and number of coils inserted did not change the effect of the procedure time on thromboembolic events (p for interactions > 0.05). Conclusion: This study showed that the procedure time might be the most effective modifiable factor for reducing thromboembolic events irrespective of the procedure methods used during coil embolization of cerebral aneurysms.
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Affiliation(s)
- Sang-Hwa Lee
- Department of Neurology, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Min Uk Jang
- Department of Neurology, Hallym University College of Medicine, Dongtan Sacred Heart Hospital, Hwaseong, South Korea
| | - Jihoon Kang
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University, Seongnam, South Korea
| | - Yeo Jin Kim
- Department of Neurology, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Chulho Kim
- Department of Neurology, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Jong-Hee Sohn
- Department of Neurology, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Jinseo Yang
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Jin Pyeong Jeon
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Yongjun Cho
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
| | - Hyuk Jai Choi
- Department of Neurosurgery, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea
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9
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Lyoubi-Idrissi AL, Jouvent E, Poupon C, Chabriat H. Diffusion magnetic resonance imaging in cerebral small vessel disease. Rev Neurol (Paris) 2017; 173:201-210. [PMID: 28392060 DOI: 10.1016/j.neurol.2017.03.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 12/04/2016] [Accepted: 03/09/2017] [Indexed: 01/13/2023]
Abstract
Cerebral small vessel disease (SVD) is frequent in the elderly, and accounts for a wide spectrum of clinical and radiological manifestations. This report summarizes the most important findings obtained using diffusion MRI (DWI) in SVD. With DWI and apparent diffusion coefficient (ADC) maps, recent ischemic lesions can easily be detected after acute stroke in SVD, while even multiple simultaneous lesions may be observed. Microstructural changes are frequent in SVD, with increases in diffusivity and decreases in anisotropy being the most reliable findings observed, mainly in white matter. These tissue changes are associated with clinical severity and especially executive dysfunction. They can also precede the usual MRI markers of SVD, such as white matter hyperintensities, microbleeds and lacunes. Thus, DWI may reveal surrogate markers of SVD progression and offer a better understanding of their underlying mechanisms.
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Affiliation(s)
- A L Lyoubi-Idrissi
- Department of Neurology, université de Paris Denis Didérot, DHU NeuroVasc Sorbonne Paris-Cité, GH Saint-Louis-Lariboisière, Assistance publique-Hôpitaux de Paris, Paris, France; CEA, Neurospin, 91191 Gif-sur-Yvette, France.
| | - E Jouvent
- Department of Neurology, université de Paris Denis Didérot, DHU NeuroVasc Sorbonne Paris-Cité, GH Saint-Louis-Lariboisière, Assistance publique-Hôpitaux de Paris, Paris, France; CEA, Neurospin, 91191 Gif-sur-Yvette, France; Inserm UMR 1161, faculté de médecine, Villemin, 75010 Paris, France
| | - C Poupon
- CEA, Neurospin, 91191 Gif-sur-Yvette, France
| | - H Chabriat
- Department of Neurology, université de Paris Denis Didérot, DHU NeuroVasc Sorbonne Paris-Cité, GH Saint-Louis-Lariboisière, Assistance publique-Hôpitaux de Paris, Paris, France; CEA, Neurospin, 91191 Gif-sur-Yvette, France; Inserm UMR 1161, faculté de médecine, Villemin, 75010 Paris, France
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10
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Bond KM, Brinjikji W, Murad MH, Kallmes DF, Cloft HJ, Lanzino G. Diffusion-Weighted Imaging-Detected Ischemic Lesions following Endovascular Treatment of Cerebral Aneurysms: A Systematic Review and Meta-Analysis. AJNR Am J Neuroradiol 2016; 38:304-309. [PMID: 27856436 DOI: 10.3174/ajnr.a4989] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 09/06/2016] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND PURPOSE Endovascular treatment of intracranial aneurysms is associated with the risk of thromboembolic ischemic complications. Many of these events are asymptomatic and identified only on diffusion-weighted imaging. We performed a systematic review and meta-analysis to study the incidence of DWI positive for thromboembolic events following endovascular treatment of intracranial aneurysms. MATERIALS AND METHODS A comprehensive literature search identified studies published between 2000 and April 2016 that reported postprocedural DWI findings in patients undergoing endovascular treatment of intracranial aneurysms. The primary outcome was the incidence of DWI positive for thromboembolic events. We examined outcomes by treatment type, sex, and aneurysm characteristics. Meta-analyses were performed by using a random-effects model. RESULTS Twenty-two studies with 2148 patients and 2268 aneurysms were included. The overall incidence of DWI positive for thromboembolic events following endovascular treatment was 49% (95% CI, 42%-56%). Treatment with flow diversion trended toward a higher rate of DWI positive for lesions than coiling alone (67%; 95% CI, 46%-85%; versus 45%; 95% CI, 33%-56%; P = .07). There was no difference between patients treated with coiling alone and those treated with balloon-assisted (44%; 95% CI, 29%-60%; P = .99) or stent-assisted (43%; 95% CI, 24%-63%; P = .89) coiling. Sex, aneurysm rupture status, location, and size were not associated with the rate of DWI positive for lesions. CONCLUSIONS One in 2 patients may have infarcts on DWI following endovascular treatment of intracranial aneurysms. There is a trend toward a higher incidence of DWI-positive lesions following treatment with flow diversion compared with coiling. Patient demographics and aneurysm characteristics were not associated with DWI-positive thromboembolic events.
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Affiliation(s)
- K M Bond
- From the Mayo Medical School (K.M.B.)
| | - W Brinjikji
- Department of Radiology (W.B., D.F.K., H.J.C.)
| | - M H Murad
- Center for Science of Healthcare Delivery (M.H.M.)
| | - D F Kallmes
- Department of Radiology (W.B., D.F.K., H.J.C.)
| | - H J Cloft
- Department of Radiology (W.B., D.F.K., H.J.C.)
| | - G Lanzino
- Department of Neurologic Surgery (G.L.), Mayo Clinic, Rochester, Minnesota
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11
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Yang H, Li Y, Jiang Y. Insufficient platelet inhibition and thromboembolic complications in patients with intracranial aneurysms after stent placement. J Neurosurg 2016; 125:247-53. [DOI: 10.3171/2015.6.jns1511] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECT
Insufficient platelet inhibition has been associated with an increased incidence of thromboembolic complications in cardiology patients undergoing percutaneous coronary intervention. Data regarding the relationship between insufficient platelet inhibition and thromboembolic complications in patients undergoing neurovascular procedures remain controversial. The purpose of this study was to assess the relationship of insufficient platelet inhibition and thromboembolic complications in patients with intracranial aneurysm undergoing stent treatment.
METHODS
The authors prospectively recruited patients with intracranial aneurysms undergoing stent treatment and maintained the data in a database. MRI with diffusion-weighted sequences was performed within 24 hours of stent insertion to identify acute ischemic lesions. The authors used thromboelastography to assess the degree of platelet inhibition in response to clopidogrel and aspirin. Univariate and multivariate logistic regression analysis was used to identify potential risk factors of thromboembolic complications.
RESULTS
One hundred sixty-eight patients with 193 aneurysms were enrolled in this study. Ninety-one of 168 (54.2%) patients with acute cerebral ischemic lesions were identified by diffusion-weighted MRI. In 9 (5.4%) patients with ischemic lesions, transient ischemic attack or stroke was found at discharge, and these complications were found in 11 (6.5%) patients during the follow-up period. The incidence of periprocedural thromboembolic complications increased with resistance to antiplatelet agents, hypertension, hyperlipidemia, complete occlusion, and aneurysm of the anterior circulation. The multivariate regression analysis demonstrated that the anterior circulation and adenosine diphosphate (ADP) inhibition percentage were independent risk factors of perioperative thromboembolic complications. The maximum amplitude and ADP inhibition percentage were independent risk factors for thromboembolic complications during the follow-up period.
CONCLUSIONS
The ADP inhibition percentage is related to thromboembolic complications after stent placement for intracranial aneurysms. The increase of the ADP inhibition may decrease the risk of thromboembolic complications.
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12
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Silent ischemic events after Pipeline embolization device: a prospective evaluation with MR diffusion-weighted imaging. J Neurointerv Surg 2016; 8:1136-1139. [DOI: 10.1136/neurintsurg-2015-012091] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 11/23/2015] [Indexed: 11/03/2022]
Abstract
BackgroundThe development of ischemic events is relatively common after endovascular interventions, and flow diverters may pose a particular threat owing to their increased technical complexity and high metal content.ObjectiveTo investigate the incidence and potential risk factors for thromboembolic lesions after treatment with a Pipeline embolization device (PED).MethodsThis prospective study included a total of 59 patients electively treated with a PED over 12 months. Postprocedural diffusion-weighted imaging sequences of the brain were obtained 24 h after interventions to detect ischemic lesions. Demographic data, aneurysm characteristics, antiplatelet management, and perioperative data were correlated with the rate of ischemic events.ResultsThe incidence of silent ischemic events after use of a PED was 62.7% (37 patients) and neurological symptoms occurred in 8.1% of affected patients. Development of ischemic events was significantly associated with older patients (≥60 years; p=0.038). Routine use of platelet function assays and newer P2Y12 receptor inhibitors (ticagrelor) were not associated with fewer thromboembolic events.ConclusionsThromboembolic events are relatively common after treatment with a PED with an incidence comparable to stent-assisted and conventional coiling but the risk of neurological morbidity from ischemic burden is low. Older patients are at particularly increased risk of thromboembolic events.
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13
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Baumbach A, Mullen M, Brickman AM, Aggarwal SK, Pietras CG, Forrest JK, Hildick-Smith D, Meller SM, Gambone L, den Heijer P, Margolis P, Voros S, Lansky AJ. Safety and performance of a novel embolic deflection device in patients undergoing transcatheter aortic valve replacement: results from the DEFLECT I study. EUROINTERVENTION 2015; 11:75-84. [DOI: 10.4244/eijy15m04_01] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Gray WA. Flights from wonder: the search for meaning in diffusion-weighted brain lesions. J Am Coll Cardiol 2015; 65:530-2. [PMID: 25677310 DOI: 10.1016/j.jacc.2014.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 12/01/2014] [Indexed: 11/30/2022]
Affiliation(s)
- William A Gray
- Center for Interventional Vascular Therapy, Columbia University Medical Center, New York, New York.
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15
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Abstract
This review discusses current imaging devices in the diagnosis of Alzheimer's disease, their neurobiological correlates and future perspectives in the development of these techniques. The challenge of diagnostic devices is to achieve high accuracy in early, preferably preclinical disease stages at the individual patient level. This is of utmost importance for the development of disease-modifying strategies and monitoring their efficacy. In order to achieve this goal, larger validation trials with prospective designs in unselected and mixed patient populations are needed. A combination of imaging methods of different modalities, both structural and functional, will probably provide optimal diagnostic sensitivity in early cases and specificity towards other dementia syndromes, as well as give in vivo insight into the distribution of disease pathology and residual brain capacity for coping with cognitive decline.
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Affiliation(s)
- Vesna Jelic
- Division of Clinical Geriatrics, NVS Department, Karolinska Institutet, Karolinska University Hospital, Hudddinge, 141 86 Stockholm, Sweden.
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16
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Meller SM, Baumbach A, Voros S, Mullen M, Lansky AJ. Challenges in cardiac device innovation: is neuroimaging an appropriate endpoint? Consensus from the 2013 Yale-UCL Cardiac Device Innovation Summit. BMC Med 2013; 11:257. [PMID: 24330754 PMCID: PMC4029193 DOI: 10.1186/1741-7015-11-257] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 11/22/2013] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Neurological events associated with transcatheter aortic valve implantation are major contributors to morbidity and mortality. Choosing an appropriate endpoint to determine neuroprotection device efficacy is a key difficulty inhibiting the translation of the innovation from the laboratory to the bedside. Cost and sample size limitations inhibit the feasibility of using the rate of clinical (such as stroke or other cerebral) events as the primary efficacy endpoint. This paper focuses on consensus opinions from the 2013 Yale-University College London (UCL) Device Innovation Summit. DISCUSSION Neuroimaging, specifically diffusion-weighted magnetic resonance imaging (DW MRI), may serve as a surrogate endpoint for clinical studies detecting cerebral events in which cost and sample-size limitations prohibit the use of clinical outcomes. A major limitation of using imaging to prove efficacy in cardiac device studies is that no standardized endpoint exists. Ongoing trials investigating cerebral protection devices for transcatheter aortic valve implantation are utilizing and reporting various qualitative and quantitative DW MRI values; however, single lesion volume, number of new lesions, and total lesion volume have been found to be the most reproducible and prognostically important imaging measures. SUMMARY DW MRI may be a useful surrogate endpoint for clinical studies detecting cerebral events to determine the device's success in neurological protection. Consensus from the 2013 Yale-UCL Device Innovation Summit specifically recommends the reporting of mean single lesion volume, number of new lesions, and total volume, and encourages European Union (EU)-US regulatory consensus in the guidance of implementing this endpoint.
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Affiliation(s)
| | | | | | | | - Alexandra J Lansky
- Yale University School of Medicine and Yale Cardiovascular Research Group, 1 Church Street Suite #330, PO Box 208017, New Haven, CT 06510, USA.
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17
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Hassell MEC, Nijveldt R, Roos YBW, Majoie CBL, Hamon M, Piek JJ, Delewi R. Silent cerebral infarcts associated with cardiac disease and procedures. Nat Rev Cardiol 2013; 10:696-706. [PMID: 24165909 DOI: 10.1038/nrcardio.2013.162] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The occurrence of clinically silent cerebral infarcts (SCIs) in individuals affected by cardiac disease and after invasive cardiac procedures is frequently reported. Indeed, atrial fibrillation, left ventricular thrombus formation, cardiomyopathy, and patent foramen ovale have all been associated with SCIs. Furthermore, postprocedural SCIs have been observed after left cardiac catheterization, transcatheter aortic valve implantation, CABG surgery, pulmonary vein isolation, and closure of patent foramen ovale. Such SCIs are often described as precursors to symptomatic stroke and are associated with cognitive decline, dementia, and depression. Increased recognition of SCIs might advance our understanding of their relationship with heart disease and invasive cardiac procedures, facilitate further improvement of therapies or techniques aimed at preventing their occurrence and, therefore, decrease the risk of adverse neurological outcomes. In this Review, we provide an overview of the occurrence and clinical significance of, and the available diagnostic modalities for, SCIs related to cardiac disease and associated invasive cardiac procedures.
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Affiliation(s)
- Mariëlla E C Hassell
- Department of Cardiology, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, Netherlands
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18
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Hahnemann ML, Ringelstein A, Sandalcioglu IE, Goericke S, Moenninghoff C, Wanke I, Forsting M, Sure U, Schlamann M. Silent embolism after stent-assisted coiling of cerebral aneurysms: diffusion-weighted MRI study of 75 cases. J Neurointerv Surg 2013; 6:461-5. [PMID: 23929549 DOI: 10.1136/neurintsurg-2013-010820] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
PURPOSE New ischemic brain lesions are common findings after cerebral diagnostic angiography and endovascular therapy. Diffusion-weighted MRI (DWI) can be used for detection of these lesions. The aim of the present study was to investigate the incidence of DWI lesions after stent-assisted coiling and the evaluation of possible risk factors. METHODS The study included a total of 75 consecutive patients treated with stent-assisted coiling. Post-procedural DWI of the brain was performed to detect ischemic lesions. Demographic data, aneurysm characteristics and angiographic parameters were correlated with properties of DWI lesions. RESULTS In post-procedural DWI, 48 of the 75 patients (64%) had 163 DWI lesions in a pattern consistent with embolic events. The number of patients with DWI lesions was significantly increased in older patients (≥55 years) and longer intervention times (≥120 min). The ischemic brain volume was significantly increased in older patients (≥55 years) as well as in patients who were implanted with a shorter stent (<20 mm). CONCLUSIONS Thromboembolic events are common after stent-assisted coiling with an incidence comparable to DWI studies after coiling alone. Despite several devices and low operator experience, stent-assisted coiling for intracranial aneurysms has a very low risk of permanent neurologic disability. Further studies are necessary to improve the safety of stent-assisted coiling for patients in conditions with increased risk potential (age, procedure time, stent length).
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Affiliation(s)
- M L Hahnemann
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany
| | - A Ringelstein
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany
| | - I E Sandalcioglu
- Department of Neurosurgery, University Hospital Essen, Essen, NRW, Germany
| | - S Goericke
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany
| | - C Moenninghoff
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany
| | - I Wanke
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany Department of Neuroradiology, Clinic Hirslanden, Zürich, Switzerland
| | - M Forsting
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany
| | - U Sure
- Department of Neurosurgery, University Hospital Essen, Essen, NRW, Germany
| | - M Schlamann
- Department of Diagnostic and Interventional Radiology, University Hospital Essen, Essen, NRW, Germany
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19
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Maggio P, Altamura C, Landi D, Migliore S, Lupoi D, Moffa F, Quintiliani L, Vollaro S, Palazzo P, Altavilla R, Pasqualetti P, Errante Y, Quattrocchi CC, Tibuzzi F, Passarelli F, Arpesani R, di Giambattista G, Grasso FR, Luppi G, Vernieri F. Diffusion-weighted lesions after carotid artery stenting are associated with cognitive impairment. J Neurol Sci 2013; 328:58-63. [DOI: 10.1016/j.jns.2013.02.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 01/24/2013] [Accepted: 02/21/2013] [Indexed: 10/27/2022]
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20
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Kim BJ, Lee SW, Park SW, Kang DW, Kim JS, Kwon SU. Insufficient Platelet Inhibition Is Related to Silent Embolic Cerebral Infarctions After Coronary Angiography. Stroke 2012; 43:727-32. [DOI: 10.1161/strokeaha.111.641340] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Bum Joon Kim
- From the Departments of Neurology (B.J.K., D.-W.K., J.S.K., S.U.K.) and Cardiology (S.-W.L., S.-W.P.), Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea
| | - Seung-Whan Lee
- From the Departments of Neurology (B.J.K., D.-W.K., J.S.K., S.U.K.) and Cardiology (S.-W.L., S.-W.P.), Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea
| | - Seong-Wook Park
- From the Departments of Neurology (B.J.K., D.-W.K., J.S.K., S.U.K.) and Cardiology (S.-W.L., S.-W.P.), Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea
| | - Dong-Wha Kang
- From the Departments of Neurology (B.J.K., D.-W.K., J.S.K., S.U.K.) and Cardiology (S.-W.L., S.-W.P.), Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea
| | - Jong S. Kim
- From the Departments of Neurology (B.J.K., D.-W.K., J.S.K., S.U.K.) and Cardiology (S.-W.L., S.-W.P.), Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea
| | - Sun U. Kwon
- From the Departments of Neurology (B.J.K., D.-W.K., J.S.K., S.U.K.) and Cardiology (S.-W.L., S.-W.P.), Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Republic of Korea
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21
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Jurga J, Nyman J, Tornvall P, Mannila MN, Svenarud P, van der Linden J, Sarkar N. Cerebral Microembolism During Coronary Angiography. Stroke 2011; 42:1475-7. [DOI: 10.1161/strokeaha.110.608638] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background and Purpose—
Microemboli observed during coronary angiography can cause silent ischemic cerebral lesions. The aim of this study was to investigate if the number of particulate cerebral microemboli during coronary angiography is influenced by access site used.
Methods—
Fifty-one patients with stable angina pectoris referred for coronary angiography were randomized to right radial or right femoral arterial access. The number of particulate microemboli passing the middle cerebral arteries was continuously registered with transcranial Doppler.
Results—
The median (minimum–maximum range) numbers of particulate emboli were significantly higher with radial 10 (1–120) than with femoral 6 (1–19) access. More particulate microemboli passed the right middle cerebral artery with the radial access.
Conclusions—
This study indicates that the radial access used for coronary angiography generates more particulate cerebral microemboli than the femoral access and thus may influence the occurrence of silent cerebral injuries.
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Affiliation(s)
- Juliane Jurga
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Jesper Nyman
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Per Tornvall
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Maria Nastase Mannila
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Peter Svenarud
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Jan van der Linden
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Nondita Sarkar
- From Cardiology Unit, Department of Medicine (J.J., P.T., M.N.M., N.S.), and Department of Molecular Medicine and Surgery (J.N., P.S., J.v.d.L.), Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
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22
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Mahmood F, Hansen RH, Agerholm-Larsen B, Jensen KS, Iversen HK, Gehl J. Diffusion-weighted MRI for verification of electroporation-based treatments. J Membr Biol 2011; 240:131-8. [PMID: 21380763 PMCID: PMC3069326 DOI: 10.1007/s00232-011-9351-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Accepted: 02/18/2011] [Indexed: 11/18/2022]
Abstract
Clinical electroporation (EP) is a rapidly advancing treatment modality that uses electric pulses to introduce drugs or genes into, e.g., cancer cells. The indication of successful EP is an instant plasma membrane permeabilization in the treated tissue. A noninvasive means of monitoring such a tissue reaction represents a great clinical benefit since, in case of target miss, retreatment can be performed immediately. We propose diffusion-weighted magnetic resonance imaging (DW-MRI) as a method to monitor EP tissue, using the concept of the apparent diffusion coefficient (ADC). We hypothesize that the plasma membrane permeabilization induced by EP changes the ADC, suggesting that DW-MRI constitutes a noninvasive and quick means of EP verification. In this study we performed in vivo EP in rat brains, followed by DW-MRI using a clinical MRI scanner. We found a pulse amplitude-dependent increase in the ADC following EP, indicating that (1) DW-MRI is sensitive to the EP-induced changes and (2) the observed changes in ADC are indeed due to the applied electric field.
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Affiliation(s)
- Faisal Mahmood
- Center for Experimental Drug and Gene Electrotransfer, Department of Oncology, Copenhagen University Hospital, Herlev Ringvej 75, 2730 Herlev, Denmark
| | - Rasmus H. Hansen
- Department of Radiology, Copenhagen University Hospital, Herlev, Denmark
| | - Birgit Agerholm-Larsen
- Center for Experimental Drug and Gene Electrotransfer, Department of Oncology, Copenhagen University Hospital, Herlev Ringvej 75, 2730 Herlev, Denmark
- Glostrup Research Institute, Department of Neurology, Copenhagen University Hospital, Glostrup, Denmark
| | - Kurt S. Jensen
- Center for Experimental Drug and Gene Electrotransfer, Department of Oncology, Copenhagen University Hospital, Herlev Ringvej 75, 2730 Herlev, Denmark
- Glostrup Research Institute, Department of Neurology, Copenhagen University Hospital, Glostrup, Denmark
| | - Helle K. Iversen
- Glostrup Research Institute, Department of Neurology, Copenhagen University Hospital, Glostrup, Denmark
| | - Julie Gehl
- Center for Experimental Drug and Gene Electrotransfer, Department of Oncology, Copenhagen University Hospital, Herlev Ringvej 75, 2730 Herlev, Denmark
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23
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Chaudhuri K, Marasco SF. The effect of carbon dioxide insufflation on cognitive function during cardiac surgery. J Card Surg 2011; 26:189-96. [PMID: 21395683 DOI: 10.1111/j.1540-8191.2011.01217.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The use of carbon dioxide (CO(2)) insufflation into the pericardial well has become widespread, and in some units routine. The rationale behind this practice is the fact that CO(2) is more soluble than air leading to fewer gaseous microemboli entering the bloodstream and being transferred to the brain or heart. However, the evidence that this reduces postoperative neurocognitive decline is scant. Although CO(2) insufflation is generally a safe procedure there are case reports of significant complications. The aim of this systematic review is to analyze the current evidence for this practice.
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24
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Delmaire C, Lehéricy S, Dormont D. [Imaging of dementia in clinical routine. Recommendations of SFNR]. J Neuroradiol 2010; 37:122-6. [PMID: 20346511 DOI: 10.1016/j.neurad.2009.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 11/24/2009] [Indexed: 10/19/2022]
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25
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Leary MC, Caplan LR. Technology insight: brain MRI and cardiac surgery--detection of postoperative brain ischemia. ACTA ACUST UNITED AC 2007; 4:379-88. [PMID: 17589428 DOI: 10.1038/ncpcardio0915] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2006] [Accepted: 04/05/2007] [Indexed: 11/08/2022]
Abstract
Annually, an estimated 1 million patients undergo heart surgery worldwide. Unfortunately, stroke continues to be a frequent complication of cardiac surgery, with the specific cerebrovascular risk depending upon the particular surgical procedure performed. Neuroimaging has an integral role in the initial evaluation and management of patients who present with acute stroke symptoms following cardiac surgery. The aim of this paper is to review the role brain MRI has in detecting postoperative brain ischemia in these patients. Multimodal MRI--using diffusion-weighted MRI (DWI), perfusion-weighted MRI, and gradient-recalled echo imaging--has an excellent capacity to identify and delineate the size and location of acute ischemic strokes as well as intracerebral hemorrhages. This differentiation is critical in making appropriate treatment decisions in the acute setting, such as determining patient eligibility for thrombolytic or hemodynamic therapies. At present, DWI offers prognostic value in patients with strokes following cardiac surgery. Additionally, DWI could be a valuable tool for evaluating stroke preventive measures as well as therapeutic interventions in patients undergoing CABG surgery.
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Affiliation(s)
- Megan C Leary
- Harvard Clinical Research Institute, Boston, MA, USA
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26
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Mayzel-Oreg O, Assaf Y, Gigi A, Ben-Bashat D, Verchovsky R, Mordohovitch M, Graif M, Hendler T, Korczyn A, Cohen Y. High b-value diffusion imaging of dementia: Application to vascular dementia and alzheimer disease. J Neurol Sci 2007; 257:105-13. [PMID: 17360001 DOI: 10.1016/j.jns.2007.01.048] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Alzheimer's disease (AD) and Vascular Dementia (VaD) are the most common types of dementia and are progressive diseases affecting millions of people. Despite the high sensitivity of MRI to neurological disorders it has not thus far been found to be specific for the detection of either of these pathologies. In the present study high b-value q-space diffusion-weighted MRI (DWI) was applied to VaD and AD. Controls (N=4), VaD patients (N=8) and AD patients (N=6) were scanned with high b-value DWI, which emphasizes the water component which exhibits restricted diffusion. VaD patients were found to present major WM loss while, in AD, the major pathology found was GM changes, as expected. Also, WM changes in VaD and AD were of a different pattern, more specific to frontal and temporal areas in AD and more widespread in VaD. This pattern of WM changes may be utilized as a diagnosis criterion. Conventional diffusion tensor imaging did not show significant changes between either of the groups and controls. These results demonstrate the potential of high b-value DWI in the diagnosis of dementia.
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Affiliation(s)
- Orna Mayzel-Oreg
- School of Chemistry, The Sackler Faulty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
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Malloy P, Correia S, Stebbins G, Laidlaw DH. Neuroimaging of white matter in aging and dementia. Clin Neuropsychol 2007; 21:73-109. [PMID: 17366279 DOI: 10.1080/13854040500263583] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Clinical neuroscientists have focused increasing attention on white matter connections in the brain and on the effects of aging and disease on these connections. Recent advances in magnetic resonance imaging (MRI) analysis have given researchers new tools for quantifying and visualizing white matter to better relate white matter structure and function. The goals of this article are (a) to acquaint the reader with both established and newer methods for imaging and quantifying white matter anatomy and pathology; and (b) to review recent findings on white matter pathology in aging and dementia. Computer-assisted quantification appears to offer better statistical power than visual rating scales for detecting these relationships. New MR modalities such as diffusion imaging can detect white matter abnormalities not shown with conventional acquisition sequences. These newer techniques hold promise for early detection of disease and for delineating functional connections between brain areas.
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Affiliation(s)
- Paul Malloy
- Brown University Medical School, Providence, RI, USA.
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28
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Abstract
Cardiovascular and cerebrovascular disorders are the main cause of death and permanent disability worldwide. Improved diagnostic and therapeutic options for these diseases have led to increasing numbers of invasive procedures such as angiography, stent placement, and operations exceeding 4 million each year in the USA. Although clinical examinations suggest a relatively low risk for ischaemic complications affecting the brain, new magnetic resonance techniques have led to the awareness of much higher numbers of clinically silent ischaemic brain lesions. Diffusion-weighted MRI (DWI) has shown new ischaemic lesions in a substantial number of patients undergoing cardiac or carotid-artery surgery, and coronary or cerebral-angiographic interventions. The clinical impact of these "silent" ischaemic lesions within brain areas without primary motor, sensory, or linguistic function ("non-eloquent" brain areas) is debated. There is increasing evidence, however, that cumulative burden of ischaemic brain injury causes neuropsychological deficits or aggravates vascular dementia. Thus, DWI emerges as a valuable diagnostic method for the monitoring of periprocedural ischaemic events in the brain, and could be a surrogate parameter for optimising diagnostic and therapeutic vascular procedures in the future.
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Affiliation(s)
- Martin Bendszus
- Department of Neuroradiology, University of Würzburg, Germany.
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29
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Liu T, Young G, Huang L, Chen NK, Wong STC. 76-space analysis of grey matter diffusivity: methods and applications. Neuroimage 2006; 31:51-65. [PMID: 16434215 DOI: 10.1016/j.neuroimage.2005.11.041] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2005] [Revised: 11/14/2005] [Accepted: 11/21/2005] [Indexed: 10/25/2022] Open
Abstract
Diffusion-weighted imaging (DWI) and diffusion tensor imaging (DTI) allow in vivo investigation of molecular motion of tissue water at a microscopic level in cerebral gray matter (GM) and white matter (WM). DWI/DTI measure of water diffusion has been proven to be invaluable for the study of many neurodegenerative diseases (e.g., Alzheimer's disease and Creutzfeldt-Jakob disease) that predominantly involve GM. Thus, quantitative analysis of GM diffusivity is of scientific interest and is promised to have a clinical impact on the investigation of normal brain aging and neuropathology. In this paper, we propose an automated framework for analysis of GM diffusivity in 76 standard anatomic subdivisions of gray matter to facilitate studies of neurodegenerative and other gray matter neurological diseases. The computational framework includes three enabling technologies: (1) automatic parcellation of structural MRI GM into 76 precisely defined neuroanatomic subregions ("76-space"), (2) automated segmentation of GM, WM and CSF based on DTI data, and (3) automatic measurement of the average apparent diffusion coefficient (ADC) in each segmented GM subregion. We evaluate and validate this computational framework for 76-space GM diffusivity analysis using data from normal volunteers and from patients with Creutzfeldt-Jakob disease.
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Affiliation(s)
- Tianming Liu
- Center for Bioinformatics, Harvard Center for Neurodegeneration and Repair, Harvard Medical School, MA 02478, USA.
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30
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Zhao FY, Kuroiwa T, Miyasakai N, Tanabe F, Nagaoka T, Akimoto H, Ohno K, Tamura A. Diffusion tensor feature in vasogenic brain edema in cats. ACTA NEUROCHIRURGICA. SUPPLEMENT 2006; 96:168-70. [PMID: 16671448 DOI: 10.1007/3-211-30714-1_37] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We investigated the correlation between the changes in diffusion tensor magnetic resonance imaging, regional water content, and tissue ultrastructure after vasogenic brain edema induced by cortical cold lesioning. In this cat model, E3 in the white matter was dominantly increased while fractional anisotropy (FA) was significantly decreased 8 hours after cortical cold lesioning. This finding indicates that water diffusion in the cortical white matter mainly increased perpendicularly rather than parallel to the direction of the nerve fibers. Additionally, in the area where edema is mild or moderate (tissues with water content of 65% to 75%), FA in the chronic phase was significantly lower than that in the acute phase. Histological examination demonstrated disordered arrangement of nerve fibers, highly dissociated neuronal fibers due to extracellular accumulation of protein rich-fluid, and enlarged interfiber spaces in the acute phase.
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Affiliation(s)
- F Y Zhao
- Bio-Organic and Natural Products Research Laboratory, McLean Hospital, Harvard Medical School, Boston, MA 02478, USA.
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31
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Abstract
The number of elderly people is increasing rapidly and, therefore, an increase in neurodegenerative and cerebrovascular disorders causing dementia is expected. Alzheimer disease (AD) is the most common cause of dementia. Vascular dementia, dementia with Lewy bodies, and frontotemporal dementia are the most frequent causes after AD, but a large proportion of patients have a combination of degenerative and vascular brain pathology. Characteristic magnetic resonance (MR) imaging findings can contribute to the identification of different diseases causing dementia. The MR imaging protocol should include axial T2-weighted images (T2-WI), axial fluid-attenuated inversion recovery (FLAIR) or proton density-weighted images, and axial gradient-echo T2*-weighted images, for the detection of cerebrovascular pathology. Structural neuroimaging in dementia is focused on detection of brain atrophy, especially in the medial temporal lobe, for which coronal high resolution T1-weighted images perpendicular to the long axis of the temporal lobe are extremely important. Single photon emission computed tomography and positron emission tomography may have added value in the diagnosis of dementia and may become more important in the future, due to the development of radioligands for in vivo detection of AD pathology. New functional MR techniques and serial volumetric imaging studies to identify subtle brain abnormalities may also provide surrogate markers for pathologic processes that occur in diseases causing dementia and, in conjunction with clinical evaluation, may enable a more rigorous and early diagnosis, approaching the accuracy of neuropathology.
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Affiliation(s)
- António J Bastos Leite
- Department of Radiology, Vrije Universiteit (VU) Medical Center, Amsterdam, the Netherlands.
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32
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Abstract
Diffusion-weighted MR images provide information that is present in no other imaging modality. Whilst some of this information may be appreciated visually in diffusion weighted images, much of it may be extracted only with the aid of data post-processing. This review summarizes the methods available for interpreting diffusion weighted imaging (DWI) information using the diffusion tensor and other models of the DWI signal. This is followed by an overview of methods that allow the estimation of fibre tract orientation and that provide estimates of the routes and degree of anatomical cerebral white matter connectivity.
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Affiliation(s)
- G J M Parker
- Imaging Science and Biomedical Engineering, University of Manchester, Oxford Road, Manchester M13 9PT, UK
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Rodrigo S, Henry-Feugeas MC, Oppenheim C, Verny M, Meder JF, Fredy D. [Imaging of dementia with magnetic resonance]. Presse Med 2004; 33:1027-33. [PMID: 15523253 DOI: 10.1016/s0755-4982(04)98832-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The diagnostic approach of dementia has clearly improved with the progress in medical imaging, notably magnetic resonance imaging. The conventional T1 and T2 sequences or morphological imaging have demonstrated their interest in the positive and differential diagnosis of dementia, together with the more precise description of normal ageing of the brain. The ANAES (French medicines agency) proposes systematic brain imaging, notably by magnetic resonance imaging (MRI) in their practical guidelines for the diagnosis of Alzheimer's disease (http://www.anaes.fr). THE INTEREST OF CERTAIN IMAGING TECHNIQUES: The therapeutic progress in treatment of dementia implies that the different affections be recognised as early as possible. With this in mind, the functional MRI is capable of describing the damage in cases when morphological imaging is not sufficiently specific. Recent studies have reported the interest of diffusion and perfusion imaging, activation MRI and proton spectroscopy. FROM A THERAPEUTIC POINT OF VIEW: The combination of morphological and functional approaches will provide a better definition of the groups at risk in order to target current treatments and those to come.
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Affiliation(s)
- S Rodrigo
- Département d'imagerie morphologique et fonctionnelle, Centre Hospitalier Sainte-Anne, Paris
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34
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35
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Assaf Y, Mayk A, Eliash S, Speiser Z, Cohen Y. Hypertension and neuronal degeneration in excised rat spinal cord studied by high-b value q-space diffusion magnetic resonance imaging. Exp Neurol 2003; 184:726-36. [PMID: 14769364 DOI: 10.1016/s0014-4886(03)00274-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2003] [Revised: 05/11/2003] [Accepted: 05/19/2003] [Indexed: 11/21/2022]
Abstract
Hypertension is one of the major risk factors of stroke and vascular dementia (VaD). We used stroke prone spontaneous hypertensive rats (SPSHRs) as a model for neuronal degeneration frequently occurring in humans with vascular disease. Recently, high b value q-space diffusion-weighted imaging (DWI) was shown to be very sensitive to the pathophysiological state of the white matter. We studied the spinal cords of SPSHR rats ex vivo after the appearance of motor impairments using diffusion anisotropy and q-space diffusion imaging (measured at a high b value of up to 1 x 10(5) s/mm(2)). The diffusion anisotropy images computed from low b value data set (b(max) approximately 2500 s/mm(2)) showed a small but statistically significant decrease (approximately 12%, P < 0.05) in the diffusion anisotropy in the spinal cords of the SPSHR group as compared to control rats. However, more significant changes were found in the high b value q-space diffusion images. The q-space displacement values in the white matter of the SPSHR group were found to be higher by more than 70% (P < 0.002) than that of the control group. These observations concurred with electron microscopy (EM) that showed significant demyelination in the spinal cords of the SPSHR group. These results seem to indicate that high b value q-space DWI might be a sensitive method for following demyelination and axonal loss associated with vascular insults.
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Affiliation(s)
- Yaniv Assaf
- TEVA Pharmaceutical Industries Ltd. and Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
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36
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Mascalchi M, Tessa C, Moretti M, Della Nave R, Boddi V, Martini S, Inzitari D, Villari N. Whole brain apparent diffusion coefficient histogram: a new tool for evaluation of leukoaraiosis. J Magn Reson Imaging 2002; 15:144-8. [PMID: 11836769 DOI: 10.1002/jmri.10050] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE To test whole brain apparent diffusion coefficient histogram analysis as an alternative approach to visual score for the assessment of leukoaraiosis (LA). MATERIALS AND METHODS T2 and diffusion weighted images were obtained in 15 elderly patients. LA extension was assessed on T2 weighted images by two observers using a semiquantitative visual score. Apparent diffusion coefficient (ADC) maps of the entire brain were generated and, after exclusion of the skull with manual tracing and of the cerebrospinal fluid (CSF) by application of a threshold value, whole brain (WB)-ADC histogram was obtained. Moreover, a brain volume index (BVI) was calculated on ADC maps as (intracranial volume - CSF volume) /intracranial volume. RESULTS The kappa inter-observer agreement for LA scoring was 0.69. Manual segmentation of the skull showed a mean inter-operator coefficient of variation below 3%. The median value of whole brain ADC histogram directly correlated with LA extension (P = 0.013). Moreover a significant inverse correlation (P = 0.002) was found between WB-ADC median value and BVI. CONCLUSION WB-ADC histogram is a reproducible alternative tool for assessing LA extension and severity.
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Affiliation(s)
- Mario Mascalchi
- Radiodiagnostica, Dipartimento di Fisiopatologia Clinica, Università di Firenze, Firenze, Italy.
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37
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Eastwood JD, Fiorella DJ, MacFall JF, Delong DM, Provenzale JM, Greenwood RS. Increased brain apparent diffusion coefficient in children with neurofibromatosis type 1. Radiology 2001; 219:354-8. [PMID: 11323456 DOI: 10.1148/radiology.219.2.r01ap25354] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To describe the changes in brain water diffusibility in five anatomic locations in children with neurofibromatosis type 1 (NF 1) compared with these changes in control subjects and to describe the water diffusibility changes associated with hyperintense basal ganglia lesions in children with NF 1. MATERIALS AND METHODS Twenty highly related pairs of children consisting of one child with NF 1 and one unaffected child were examined. Prospective comparisons of isotropic apparent diffusion coefficient (ADC) values at five anatomic locations were performed, with and without T2-hyperintense lesions included. Retrospective analysis of hyperintense globus pallidus lesions in 16 children and in the paired control subjects also was performed. RESULTS Significant increases in ADC values were seen in all five anatomic locations in the NF 1 group. The greatest increases were seen in the globus pallidus (14%; P =.002) and brachium pontis (10.8%; P =.003). With exclusion of hyperintense lesions, significant ADC increases were measured in four locations. Significant ADC increases were seen in hyperintense globus pallidus lesions in the NF 1 group compared with ADC values in the normal-appearing contralateral globus pallidus (4.9%; P =.02) and those in the globus pallidus of the paired control subjects (16%; P =.003). CONCLUSION Significant ADC increases were measured both in the hyperintense lesions and in the normal-appearing areas of the brain in children with NF 1.
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Affiliation(s)
- J D Eastwood
- Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710, USA.
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38
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Masuda J, Nabika T, Notsu Y. Silent stroke: pathogenesis, genetic factors and clinical implications as a risk factor. Curr Opin Neurol 2001; 14:77-82. [PMID: 11176221 DOI: 10.1097/00019052-200102000-00012] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Silent stroke is frequently recognized in elderly persons. Diffusion-weighted magnetic resonance imaging has proved to be highly sensitive in the detection of recent silent stroke, and may further applications in the future. Silent stroke in healthy and asymptomatic individuals mainly comprises lacunar infarcts, which are often associated with white matter changes. Thus, analyses of risk factors and genetic factors in small-vessel diseases such as lacunar infarct and white matter changes may provide clues regarding the pathogenesis of silent stroke. Silent stroke may be a risk factor for clinical stroke and cognitive impairment, but prospective studies are required to confirm this.
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Affiliation(s)
- J Masuda
- Department of Laboratory Medicine, Shimane Medical University, Izumo, Shimane, Japan.
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39
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Hsu YY, Du AT, Schuff N, Weiner MW. Magnetic resonance imaging and magnetic resonance spectroscopy in dementias. J Geriatr Psychiatry Neurol 2001; 14:145-66. [PMID: 11563438 PMCID: PMC1857299 DOI: 10.1177/089198870101400308] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This article reviews recent studies of magnetic resonance imaging and magnetic resonance spectroscopy in dementia, including Alzheimer's disease, frontotemporal dementia, dementia with Lewy bodies, idiopathic Parkinson's disease, Huntington's disease, and vascular dementia. Magnetic resonance imaging and magnetic resonance spectroscopy can detect structural alteration and biochemical abnormalities in the brain of demented subjects and may help in the differential diagnosis and early detection of affected individuals, monitoring disease progression, and evaluation of therapeutic effect.
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Affiliation(s)
- Y Y Hsu
- Magnetic Resonance Unit, Department of Veterans Affairs Medical Center, San Francisco 94121, USA
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40
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Scheltens P, Korf ES. Contribution of neuroimaging in the diagnosis of Alzheimer's disease and other dementias. Curr Opin Neurol 2000; 13:391-6. [PMID: 10970055 DOI: 10.1097/00019052-200008000-00005] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
This paper reviews the use of neuroimaging in the diagnosis of dementia, especially Alzheimer's disease. Computed tomography is still used to determine reversible causes of dementia; however, without clinical symptoms these causes are hard to find and computed tomography scanning is only cost-effective in a defined group of patients. Using magnetic resonance imaging, atrophy of the medial temporal lobe can be assessed volumetrically and visually, with a high correlation between the two methods. Medial temporal lobe atrophy is highly predictive of Alzheimer's disease, and correlates with neuropsychological performance and postmortem histologically measured volume. Cerebral volume changes over time seem to differentiate Alzheimer's disease and mild cognitive impairment progressing to Alzheimer's disease from controls with high accuracy. Studies of the corpus callosum in dementia indicate a cortico-cortical disconnection caused by atrophy. Of the new techniques, functional magnetic resonance imaging seems the most promising. This technique can possibly play a role in predicting Alzheimer's disease in patients with mild cognitive impairment. The use of single-photon emission computed tomography and positron emission tomography in (early) differential diagnoses seems limited. Lower regional cerebral blood flow is related to the severity of dementia and survival. Iodine-123 iodobenzamide single-photon emission computed tomography in dementia with Lewy bodies seems promising. Current and future positron emission tomography studies concentrate on memory function and receptor imaging. The focus in neuroimaging, especially magnetic resonance imaging, has shifted to early diagnosis and monitoring of the disease course, with a special interest in predicting dementia in patients with mild cognitive impairment.
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Affiliation(s)
- P Scheltens
- Department of Neurology, Academisch Ziekenhuis VU, Amsterdam, The Netherlands.
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