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Legrand L, Le Berre A, Seners P, Benzakoun J, Ben Hassen W, Lion S, Boulouis G, Cottier JP, Costalat V, Bracard S, Berthezene Y, Ozsancak C, Provost C, Naggara O, Baron JC, Turc G, Oppenheim C. FLAIR Vascular Hyperintensities as a Surrogate of Collaterals in Acute Stroke: DWI Matters. AJNR Am J Neuroradiol 2023; 44:26-32. [PMID: 36521962 PMCID: PMC9835925 DOI: 10.3174/ajnr.a7733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/27/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND PURPOSE FLAIR vascular hyperintensities are thought to represent leptomeningeal collaterals in acute ischemic stroke. However, whether all-FLAIR vascular hyperintensities or FLAIR vascular hyperintensities-DWI mismatch, ie, FLAIR vascular hyperintensities beyond the DWI lesion, best reflects collaterals remains debated. We aimed to compare the value of FLAIR vascular hyperintensities-DWI mismatch versus all-FLAIR vascular hyperintensities for collateral assessment using PWI-derived collateral flow maps as a reference. MATERIALS AND METHODS We retrospectively reviewed the registries of 6 large stroke centers and included all patients with acute stroke with anterior circulation large-vessel occlusion who underwent MR imaging with PWI before thrombectomy. Collateral status was graded from 1 to 4 on PWI-derived collateral flow maps and dichotomized into good (grades 3-4) and poor (grades 1-2). The extent of all-FLAIR vascular hyperintensities and FLAIR vascular hyperintensities-DWI mismatch was assessed on the 7 cortical ASPECTS regions, ranging from 0 (absence) to 7 (extensive), and associations with good collaterals were compared using receiver operating characteristic curves. RESULTS Of the 209 included patients, 133 (64%) and 76 (36%) had good and poor collaterals, respectively. All-FLAIR vascular hyperintensity extent was similar between collateral groups (P = .76). Conversely, FLAIR vascular hyperintensities-DWI mismatch extent was significantly higher in patients with good compared with poor collaterals (P < .001). The area under the curve was 0.80 (95% CI, 0.74-0.87) for FLAIR vascular hyperintensities-DWI mismatch and 0.52 (95% CI, 0.44-0.60) for all-FLAIR vascular hyperintensities (P < .001 for the comparison), to predict good collaterals. Variables independently associated with good collaterals were smaller DWI lesion volume (P < .001) and larger FLAIR vascular hyperintensities-DWI mismatch (P = .02). CONCLUSIONS In acute ischemic stroke with large-vessel occlusion, the extent of FLAIR vascular hyperintensities does not reliably reflect collateral status unless one accounts for DWI.
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Affiliation(s)
- L Legrand
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
| | - A Le Berre
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
| | - P Seners
- Department of Neurology (P.S.), Hôpital Fondation Rothschild, Paris, France
| | - J Benzakoun
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
| | - W Ben Hassen
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
| | - S Lion
- Edmus Services (S.L.), Fondation Edmus, Lyon, France
| | - G Boulouis
- Department of Diagnostic and Interventional Neuroradiology (G.B., J-.P.C.), Bretonneau Hospital, University of Tours, Institut National de la Santé et de la Recherche Médicale 1253 iBrain, Tours, France
| | - J-P Cottier
- Department of Diagnostic and Interventional Neuroradiology (G.B., J-.P.C.), Bretonneau Hospital, University of Tours, Institut National de la Santé et de la Recherche Médicale 1253 iBrain, Tours, France
| | - V Costalat
- Department of Interventional Neuroradiology (V.C.), Centre Hospitalier Regional Universitaire Gui de Chauliac, Montpellier, France
| | - S Bracard
- Department of Diagnostic and Interventional Neuroradiology (S.B.), University Hospital of Nancy, Institut National de la Santé et de la Recherche Médicale U947, Nancy, France
| | - Y Berthezene
- Department of Neuroradiology (Y.B.), Hospices Civils de Lyon, Lyon, France
| | - C Ozsancak
- Department of Neurology (C. Ozsancak), Orleans Hospital, Orleans, France
| | - C Provost
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
| | - O Naggara
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
| | - J-C Baron
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Neurology (J.-C.B., G.T.), Groupe Hospitalier Universitaire-Paris Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - G Turc
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Neurology (J.-C.B., G.T.), Groupe Hospitalier Universitaire-Paris Psychiatrie et Neurosciences, Sainte-Anne Hospital, Paris, France
| | - C Oppenheim
- From the Institute of Psychiatry and Neuroscience of Paris (L.L., A.L.B., J.B., W.B.H., C.P., O.N., J.-C.B., G.T., C. Oppenheim), Université Paris Cité, Institut National de la Santé et de la Recherche Médicale U1266, Federation Hospitalo-Universitaire NeuroVasc, Paris, France
- Departments of Neuroradiology (L.L., A.L.B., J.B., W.B.H., C.P., O.N., C. Oppenheim)
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Lopes LR, Losi MA, Sheikh N, Laroche C, Charron P, Gimeno J, Kaski JP, Maggioni AP, Tavazzi L, Arbustini E, Brito D, Celutkiene J, Hagege A, Linhart A, Mogensen J, Garcia-Pinilla JM, Ripoll-Vera T, Seggewiss H, Villacorta E, Caforio A, Elliott PM, Beleslin B, Budaj A, Chioncel O, Dagres N, Danchin N, Erlinge D, Emberson J, Glikson M, Gray A, Kayikcioglu M, Maggioni A, Nagy KV, Nedoshivin A, Petronio AS, Hesselink JR, Wallentin L, Zeymer U, Caforio A, Blanes JRG, Charron P, Elliott P, Kaski JP, Maggioni AP, Tavazzi L, Tendera M, Komissarova S, Chakova N, Niyazova S, Linhart A, Kuchynka P, Palecek T, Podzimkova J, Fikrle M, Nemecek E, Bundgaard H, Tfelt-Hansen J, Theilade J, Thune JJ, Axelsson A, Mogensen J, Henriksen F, Hey T, Nielsen SK, Videbaek L, Andreasen S, Arnsted H, Saad A, Ali M, Lommi J, Helio T, Nieminen MS, Dubourg O, Mansencal N, Arslan M, Tsieu VS, Damy T, Guellich A, Guendouz S, Tissot CM, Lamine A, Rappeneau S, Hagege A, Desnos M, Bachet A, Hamzaoui M, Charron P, Isnard R, Legrand L, Maupain C, Gandjbakhch E, Kerneis M, Pruny JF, Bauer A, Pfeiffer B, Felix SB, Dorr M, Kaczmarek S, Lehnert K, Pedersen AL, Beug D, Bruder M, Böhm M, Kindermann I, Linicus Y, Werner C, Neurath B, Schild-Ungerbuehler M, Seggewiss H, Pfeiffer B, Neugebauer A, McKeown P, Muir A, McOsker J, Jardine T, Divine G, Elliott P, Lorenzini M, Watkinson O, Wicks E, Iqbal H, Mohiddin S, O'Mahony C, Sekri N, Carr-White G, Bueser T, Rajani R, Clack L, Damm J, Jones S, Sanchez-Vidal R, Smith M, Walters T, Wilson K, Rosmini S, Anastasakis A, Ritsatos K, Vlagkouli V, Forster T, Sepp R, Borbas J, Nagy V, Tringer A, Kakonyi K, Szabo LA, Maleki M, Bezanjani FN, Amin A, Naderi N, Parsaee M, Taghavi S, Ghadrdoost B, Jafari S, Khoshavi M, Rapezzi C, Biagini E, Corsini A, Gagliardi C, Graziosi M, Longhi S, Milandri A, Ragni L, Palmieri S, Olivotto I, Arretini A, Castelli G, Cecchi F, Fornaro A, Tomberli B, Spirito P, Devoto E, Bella PD, Maccabelli G, Sala S, Guarracini F, Peretto G, Russo MG, Calabro R, Pacileo G, Limongelli G, Masarone D, Pazzanese V, Rea A, Rubino M, Tramonte S, Valente F, Caiazza M, Cirillo A, Del Giorno G, Esposito A, Gravino R, Marrazzo T, Trimarco B, Losi MA, Di Nardo C, Giamundo A, Musella F, Pacelli F, Scatteia A, Canciello G, Caforio A, Iliceto S, Calore C, Leoni L, Marra MP, Rigato I, Tarantini G, Schiavo A, Testolina M, Arbustini E, Di Toro A, Giuliani LP, Serio A, Fedele F, Frustaci A, Alfarano M, Chimenti C, Drago F, Baban A, Calò L, Lanzillo C, Martino A, Uguccioni M, Zachara E, Halasz G, Re F, Sinagra G, Carriere C, Merlo M, Ramani F, Kavoliuniene A, Krivickiene A, Tamuleviciute-Prasciene E, Viezelis M, Celutkiene J, Balkeviciene L, Laukyte M, Paleviciute E, Pinto Y, Wilde A, Asselbergs FW, Sammani A, Van Der Heijden J, Van Laake L, De Jonge N, Hassink R, Kirkels JH, Ajuluchukwu J, Olusegun-Joseph A, Ekure E, Mizia-Stec K, Tendera M, Czekaj A, Sikora-Puz A, Skoczynska A, Wybraniec M, Rubis P, Dziewiecka E, Wisniowska-Smialek S, Bilinska Z, Chmielewski P, Foss-Nieradko B, Michalak E, Stepien-Wojno M, Mazek B, Lopes LR, Almeida AR, Cruz I, Gomes AC, Pereira AR, Brito D, Madeira H, Francisco AR, Menezes M, Moldovan O, Guimaraes TO, Silva D, Ginghina C, Jurcut R, Mursa A, Popescu BA, Apetrei E, Militaru S, Coman IM, Frigy A, Fogarasi Z, Kocsis I, Szabo IA, Fehervari L, Nikitin I, Resnik E, Komissarova M, Lazarev V, Shebzukhova M, Ustyuzhanin D, Blagova O, Alieva I, Kulikova V, Lutokhina Y, Pavlenko E, Varionchik N, Ristic AD, Seferovic PM, Veljic I, Zivkovic I, Milinkovic I, Pavlovic A, Radovanovic G, Simeunovic D, Zdravkovic M, Aleksic M, Djokic J, Hinic S, Klasnja S, Mircetic K, Monserrat L, Fernandez X, Garcia-Giustiniani D, Larrañaga JM, Ortiz-Genga M, Barriales-Villa R, Martinez-Veira C, Veira E, Cequier A, Salazar-Mendiguchia J, Manito N, Gonzalez J, Fernández-Avilés F, Medrano C, Yotti R, Cuenca S, Espinosa MA, Mendez I, Zatarain E, Alvarez R, Pavia PG, Briceno A, Cobo-Marcos M, Dominguez F, Galvan EDT, Pinilla JMG, Abdeselam-Mohamed N, Lopez-Garrido MA, Hidalgo LM, Ortega-Jimenez MV, Mezcua AR, Guijarro-Contreras A, Gomez-Garcia D, Robles-Mezcua M, Blanes JRG, Castro FJ, Esparza CM, Molina MS, García MS, Cuenca DL, de Mallorca P, Ripoll-Vera T, Alvarez J, Nunez J, Gomez Y, Fernandez PLS, Villacorta E, Avila C, Bravo L, Diaz-Pelaez E, Gallego-Delgado M, Garcia-Cuenllas L, Plata B, Lopez-Haldon JE, Pena Pena ML, Perez EMC, Zorio E, Arnau MA, Sanz J, Marques-Sule E. Association between common cardiovascular risk factors and clinical phenotype in patients with hypertrophic cardiomyopathy from the European Society of Cardiology (ESC) EurObservational Research Programme (EORP) Cardiomyopathy/Myocarditis registry. Eur Heart J Qual Care Clin Outcomes 2022; 9:42-53. [PMID: 35138368 PMCID: PMC9745665 DOI: 10.1093/ehjqcco/qcac006] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/15/2022]
Abstract
AIMS The interaction between common cardiovascular risk factors (CVRF) and hypertrophic cardiomyopathy (HCM) is poorly studied. We sought to explore the relation between CVRF and the clinical characteristics of patients with HCM enrolled in the EURObservational Research Programme (EORP) Cardiomyopathy registry. METHODS AND RESULTS 1739 patients with HCM were studied. The relation between hypertension (HT), diabetes (DM), body mass index (BMI), and clinical traits was analysed. Analyses were stratified according to the presence or absence of a pathogenic variant in a sarcomere gene. The prevalence of HT, DM, and obesity (Ob) was 37, 10, and 21%, respectively. HT, DM, and Ob were associated with older age (P<0.001), less family history of HCM (HT and DM P<0.001), higher New York Heart Association (NYHA) class (P<0.001), atrial fibrillation (HT and DM P<0.001; Ob p = 0.03) and LV (left ventricular) diastolic dysfunction (HT and Ob P<0.001; DM P = 0.003). Stroke was more frequent in HT (P<0.001) and mutation-positive patients with DM (P = 0.02). HT and Ob were associated with higher provocable LV outflow tract gradients (HT P<0.001, Ob P = 0.036). LV hypertrophy was more severe in Ob (P = 0.018). HT and Ob were independently associated with NYHA class (OR 1.419, P = 0.017 and OR 1.584, P = 0.004, respectively). Other associations, including a higher proportion of females in HT and of systolic dysfunction in HT and Ob, were observed only in mutation-positive patients. CONCLUSION Common CVRF are associated with a more severe HCM phenotype, suggesting a proactive management of CVRF should be promoted. An interaction between genotype and CVRF was observed for some traits.
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Affiliation(s)
- Luis R Lopes
- Corresponding author. Tel: +447765109343, , Twitter handle: @LuisRLopesDr
| | - Maria-Angela Losi
- Department of Advanced Biomedical Sciences, University Federico II, Corso Umberto I, 40, Naples 80138, Italy
| | - Nabeel Sheikh
- Department of Cardiology and Division of Cardiovascular Sciences, Guy's and St. Thomas’ Hospitals and King's College London, Strand, London WC2R 2LS, UK
| | - Cécile Laroche
- EORP, European Society of Cardiology, Sophia-Antipolis, France
| | | | | | - Juan P Kaski
- Institute of Cardiovascular Science, University College London, Gower St, London WC1E 6BT, UK,Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Aldo P Maggioni
- EORP, European Society of Cardiology, Sophia-Antipolis, France,Maria Cecilia Hospital, GVM Care&Research, Via Corriera, 1, Cotignola 48033 RA, Italy
| | - Luigi Tavazzi
- Maria Cecilia Hospital, GVM Care&Research, Via Corriera, 1, Cotignola 48033 RA, Italy
| | | | - Dulce Brito
- Serviço de Cardiologia, Centro Hospitalar Universitário Lisboa Norte, Lisbon 1169-050, Portugal,CCUL, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, Lisbon 1649-028, Portugal
| | - Jelena Celutkiene
- Clinic of Cardiac and Vascular Diseases, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Universiteto g. 3, Vilnius 01513, Lithuania,State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
| | | | - Ales Linhart
- 2nd Department of Internal Cardiovascular Medicine, General University Hospital and First Medical Faculty, Charles University, Opletalova 38, Prague 110 00, Czech Republic
| | - Jens Mogensen
- Department of Cardiology, Odense University Hospital, J. B. Winsløws Vej 4, Odense 5000, Denmark
| | - José Manuel Garcia-Pinilla
- Unidad de Insuficiencia Cardiaca y Cardiopatías Familiares. Servicio de Cardiología. Hospital Universitario Virgen de la Victoria. IBIMA. Málaga and Ciber-Cardiovascular. Instituto de Salud Carlos III. Madrid, Spain
| | - Tomas Ripoll-Vera
- Inherited Cardiovascular Disease Unit Son Llatzer University Hospital & IdISBa, Palma de Mallorca, Spain
| | - Hubert Seggewiss
- Universitätsklinikum Würzburg, Deutsches Zentrum für Herzinsuffizienz (DZHI), Comprehensive Heart Failure Center (CHFC), Am Schwarzenberg 15, Haus 15A, 97078 Wurzburg, Germany
| | - Eduardo Villacorta
- Member of National Centers of expertise for familial cardiopathies (CSUR), Cardiology Department, University Hospital of Salamanca. Institute of Biomedical Research of Salamanca (IBSAL), CIBERCV, Salamanca, Spain
| | | | - Perry M Elliott
- Institute of Cardiovascular Science, University College London, Gower St, London WC1E 6BT, UK,St. Bartholomew's Hospital, Barts Heart Centre, Barts Health NHS Trust, Whitechapel Rd, London E1 1BB, UK
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Legrand L, Heuze C, Diallo A, Monin ML, Ewenczyk C, Vicaut E, Montalescot G, Isnard R, Durr A, Pousset F. Prognostic value of longitudinal strain and ejection fraction in Friedreich's ataxia. Int J Cardiol 2021; 330:259-265. [PMID: 33592237 DOI: 10.1016/j.ijcard.2021.02.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 02/01/2021] [Accepted: 02/11/2021] [Indexed: 01/19/2023]
Abstract
BACKGROUND Friedreich's ataxia (FA) is a rare autosomal recessive mitochondrial disease most commonly due to a triplet repeat expansion guanine-adenine-adenine (GAA) in the FXN gene. Cardiac disease is the major cause of death, patients with reduced left ventricular ejection fraction (LVEF) having the worse prognosis. Longitudinal strain (LS) appeared to be a better predictor of outcome than LVEF in different diseases. We compared the prognostic value of LS measured from the 4 chambers view to LVEF. METHODS From 2003 to 2017 consecutive patients with FA were included and LS analysis was retrospectively performed. RESULTS We studied 140 patients, with a median age of 34 (26-41) years (Q1-Q3) with age at onset of 14 (11-19) years and GAA repeats on the shorter allele of 600 (467-783) pb. Mean LS was 19.9 ± 5.0% and LVEF 64 ± 8%. After a mean follow-up of 7.4 ± 3.9 years, 14 patients died. In univariate Cox analysis, all-cause mortality was associated with: LS (HR 0.83; 95%CI, 0.75-0.91, p = 0.0002), LVEF (HR 0.30; 95%CI, 0.19-0.49, p < 0.0001), GAA repeats on the shorter allele (HR 1.29; 95%CI, 1.10-1.51, p = 0.002), age at onset (HR 0.87; 95%CI, 0.77-0.98, p = 0.018), LVSystolic Diameter (HR 1.17; 95%CI, 1.09-1.26, p < 0.0001), LVMass index (HR 1.02; 95%CI, 1.00-1.04, p = 0.027), and LVDiastolic Diameter (HR1.12; 95%CI, 1.01-1.23, p = 0.028). In multivariate analysis, LVEF was the only independent predictor of mortality (HR 0.41; 95%CI, 0.23-0.74, p = 0.0029). CONCLUSION In FA, LS was not an independent predictor of mortality, LVEF remained the only independent predictor in the present study.
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Affiliation(s)
- L Legrand
- Sorbonne Université, Cardiology Department, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France; ICAN (Institute for Cardiometabolism and Nutrition), Pitié-Salpêtrière University Hospital, Paris, France; ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, France
| | - C Heuze
- Sorbonne Université, Cardiology Department, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France
| | - A Diallo
- URC Lariboisière University Hospital, Paris, France; ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, France
| | - M L Monin
- Sorbonne Université, Institut du Cerveau et de la Moelle épinière (ICM), AP-HP, INSERM, CNRS, Pitié-Salpêtrière University Hospital, Paris, France
| | - C Ewenczyk
- Sorbonne Université, Institut du Cerveau et de la Moelle épinière (ICM), AP-HP, INSERM, CNRS, Pitié-Salpêtrière University Hospital, Paris, France
| | - E Vicaut
- URC Lariboisière University Hospital, Paris, France; ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, France
| | - G Montalescot
- Sorbonne Université, Cardiology Department, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France; ICAN (Institute for Cardiometabolism and Nutrition), Pitié-Salpêtrière University Hospital, Paris, France; ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, France
| | - R Isnard
- Sorbonne Université, Cardiology Department, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France; ICAN (Institute for Cardiometabolism and Nutrition), Pitié-Salpêtrière University Hospital, Paris, France; ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, France
| | - A Durr
- Sorbonne Université, Institut du Cerveau et de la Moelle épinière (ICM), AP-HP, INSERM, CNRS, Pitié-Salpêtrière University Hospital, Paris, France
| | - F Pousset
- Sorbonne Université, Cardiology Department, AP-HP, Pitié-Salpêtrière University Hospital, Paris, France; ICAN (Institute for Cardiometabolism and Nutrition), Pitié-Salpêtrière University Hospital, Paris, France; ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, France.
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Derraz I, Pou M, Labreuche J, Legrand L, Soize S, Tisserand M, Rosso C, Piotin M, Boulouis G, Oppenheim C, Naggara O, Bracard S, Clarençon F, Lapergue B, Bourcier R. Clot Burden Score and Collateral Status and Their Impact on Functional Outcome in Acute Ischemic Stroke. AJNR Am J Neuroradiol 2021; 42:42-48. [PMID: 33184069 DOI: 10.3174/ajnr.a6865] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/12/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE Collateral status and thrombus length have been independently associated with functional outcome in patients with acute ischemic stroke. It has been suggested that thrombus length would influence functional outcome via interaction with the collateral circulation. We investigated the individual and combined effects of thrombus length assessed by the clot burden score and collateral status assessed by a FLAIR vascular hyperintensity-ASPECTS rating system on functional outcome (mRS). MATERIALS AND METHODS Patients with anterior circulation acute ischemic stroke due to large-vessel occlusion from the ASTER and THRACE trials treated with endovascular thrombectomy were pooled. The clot burden score and FLAIR vascular hyperintensity score were determined on MR imaging obtained before endovascular thrombectomy. Favorable outcome was defined as an mRS score of 0-2 at 90 days. Association of the clot burden score and the FLAIR vascular hyperintensity score with favorable outcome (individual effect and interaction) was examined using logistic regression models. RESULTS Of the 326 patients treated by endovascular thrombectomy with both the clot burden score and FLAIR vascular hyperintensity assessment, favorable outcome was observed in 165 (51%). The rate of favorable outcome increased with clot burden score (smaller clots) and FLAIR vascular hyperintensity (better collaterals) values. The association between clot burden score and functional outcome was significantly modified by the FLAIR vascular hyperintensity score, and this association was stronger in patients with good collaterals, with an adjusted OR = 6.15 (95% CI, 1.03-36.81). CONCLUSIONS The association between the clot burden score and functional outcome varied for different collateral scores. The FLAIR vascular hyperintensity score might be a valuable prognostic factor, especially when contrast-based vascular imaging is not available.
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Affiliation(s)
- I Derraz
- From the Department of Neuroradiology (I.D.), Hôpital Gui de Chauliac, Montpellier University Medical Center, Montpellier, France
| | - M Pou
- Department of Neuroradiology (M.P., F.C.)
| | - J Labreuche
- Santé publique: épidémiologie et qualité des soins (J.L.), University of Lille, Centre Hospitalier Universitaire Lille, Lille, France
| | - L Legrand
- Department of Neuroradiology (L.L., G.B., C.O., O.N.), Groupe Hospitalier Universitaire site Sainte-Anne, Institut de Psychiatrie et Neurosciences de Paris, National Institute for Health and Medical Research, Université de Paris, Paris, France
| | - S Soize
- Department of Neuroradiology (S.S.), Centre Hospitalier Universitaire Reims, Reims, France
| | | | - C Rosso
- Institut du Cerveau et de la Moelle épinière (C.R.), Sorbonne Université, Institut du Cerveau, National Institute for Health and Medical Research U 1127, Urgences Cérébro-Vasculaires, Hôpital Pitié-Salpêtrière, Paris, France
| | - M Piotin
- Department of Interventional Neuroradiology (M.P.), Rothschild Fondation, Paris, France
| | - G Boulouis
- Department of Neuroradiology (L.L., G.B., C.O., O.N.), Groupe Hospitalier Universitaire site Sainte-Anne, Institut de Psychiatrie et Neurosciences de Paris, National Institute for Health and Medical Research, Université de Paris, Paris, France
| | - C Oppenheim
- Department of Neuroradiology (L.L., G.B., C.O., O.N.), Groupe Hospitalier Universitaire site Sainte-Anne, Institut de Psychiatrie et Neurosciences de Paris, National Institute for Health and Medical Research, Université de Paris, Paris, France
| | - O Naggara
- Department of Neuroradiology (L.L., G.B., C.O., O.N.), Groupe Hospitalier Universitaire site Sainte-Anne, Institut de Psychiatrie et Neurosciences de Paris, National Institute for Health and Medical Research, Université de Paris, Paris, France
| | - S Bracard
- Department of Neuroradiology (S.B.), Regional and University Hospital Centre Nancy, Nancy, France
| | | | - B Lapergue
- Stroke Center (B.L.), Foch Hospital, Suresnes, France
| | - R Bourcier
- Department of Diagnostic and Interventional Neuroradiology (R.B.), Guillaume et René Laennec University Hospital, Nantes, France
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5
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Prouknitzky J, Garot J, Legrand L, Bordet C, Ader F, Richard P, Charron P. Report of a new case of saw-tooth cardiomyopathy: Clinical presentation and genetic analysis. Archives of Cardiovascular Diseases Supplements 2021. [DOI: 10.1016/j.acvdsp.2020.10.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Baulier G, Jarnier D, Saunier A, Nallet A, Legrand L, Eyraud A. [Cutaneous lesions and testicular pain]. Rev Med Interne 2020; 42:292-293. [PMID: 33250261 DOI: 10.1016/j.revmed.2020.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 08/29/2020] [Indexed: 11/26/2022]
Affiliation(s)
- G Baulier
- Service de médecine interne, centre hospitalier de Périgueux, avenue Georges-Pompidou, 24000 Périgueux, France.
| | - D Jarnier
- Service de médecine interne, centre hospitalier de Périgueux, avenue Georges-Pompidou, 24000 Périgueux, France
| | - A Saunier
- Service de médecine interne, centre hospitalier de Périgueux, avenue Georges-Pompidou, 24000 Périgueux, France
| | - A Nallet
- Service de médecine interne, centre hospitalier de Périgueux, avenue Georges-Pompidou, 24000 Périgueux, France
| | - L Legrand
- Service d'anatomo-pathologie, centre hospitalier de Périgueux, avenue Georges-Pompidou, 24000 Périgueux, France
| | - A Eyraud
- Service de dermatologie, centre hospitalier de Périgueux, avenue Georges-Pompidou, 24000 Périgueux, France
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7
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Ben Hassen W, Tordjman M, Boulouis G, Bretzner M, Bricout N, Legrand L, Benzakoun J, Edjlali M, Seners P, Cordonnier C, Oppenheim C, Turc G, Henon H, Naggara O. Benefit of first-pass complete reperfusion in thrombectomy is mediated by limited infarct growth. Eur J Neurol 2020; 28:124-131. [PMID: 32896067 DOI: 10.1111/ene.14490] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 08/18/2020] [Indexed: 01/19/2023]
Abstract
BACKGROUND AND PURPOSE The number of clot retrieval attempts required to achieve complete reperfusion by mechanical thrombectomy impacts functional outcome in acute ischaemic stroke (AIS). Complete reperfusion [expanded Treatment In Cerebral Infarction (eTICI) score = 3] at first pass (FP), is associated with the highest rates of favorable outcome compared to complete reperfusion by multiple passes. The aim of the present study was to investigate the relationship between FP complete reperfusion and infarct growth (IG). METHODS Anterior AIS patients with baseline and 24-h diffusion-weighted magnetic resonance imaging were included from two prospective registries. IG was measured by voxel-based segmentation of initial and 24-h diffusion-weighted imaging lesions. IG and favorable 3-month modified Rankin Scale (mRS) score (≤ 2) were compared between patients in whom complete reperfusion (eTICI 3) was achieved with a single pass (FP group) and those for whom multiple passes were required (MP group), after matching for confounding factors. Mediation analysis was performed to examine the association between FP and 3-month mRS score, with IG as mediating variable. RESULTS A total of 200 patients were included, of whom 118 (28.9%) had FP complete reperfusion. In case-control analysis, the FP group had lower IG than the MP group [8.7 (5.4-12.9) ml vs. 15.2 (11-22.6) ml, respectively; P = 0.03). Favorable outcome was higher in the FP population compared to a matched MP population (70.9% vs. 53.2%, respectively; P = 0.04). FP compete reperfusion (eTICI 3) was independently associated with favorable outcome in multivariable regression analysis [odds ratio 1.86, 95% confidence interval (CI) 1.01-4.39; P = 0.04]. The effect of complete reperfusion at FP on functional outcome was explained by limited IG in mediation analysis [indirect effect: -0.32 (95% CI -0.47 to -0.09)]. CONCLUSION Complete reperfusion at FP is independently associated with significant decrease in IG compared to complete reperfusion by multiple attempts, explaining better functional outcomes.
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Affiliation(s)
- W Ben Hassen
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - M Tordjman
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - G Boulouis
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - M Bretzner
- Department of Interventional Neuroradiology, University of Lille, CHU Lille, Lille, France
| | - N Bricout
- Department of Interventional Neuroradiology, University of Lille, CHU Lille, Lille, France
| | - L Legrand
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - J Benzakoun
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - M Edjlali
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - P Seners
- Department of Neurology, CH Sainte-Anne, Paris, France
| | - C Cordonnier
- Department of Vascular Neurology, Stroke Unit, University of Lille, CHU Lille, Lille, France
| | - C Oppenheim
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
| | - G Turc
- Department of Neurology, CH Sainte-Anne, Paris, France
| | - H Henon
- Department of Vascular Neurology, Stroke Unit, University of Lille, CHU Lille, Lille, France
| | - O Naggara
- INSERM UMR 1266, Department of Neuroradiology, Université de Paris, Paris, France
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8
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Benzakoun J, Robert C, Legrand L, Pallud J, Meder JF, Oppenheim C, Dhermain F, Edjlali M. Anatomical and functional MR imaging to define tumoral boundaries and characterize lesions in neuro-oncology. Cancer Radiother 2020; 24:453-462. [PMID: 32278653 DOI: 10.1016/j.canrad.2020.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 03/04/2020] [Indexed: 12/19/2022]
Abstract
Neuroimaging and especially MRI has emerged as a necessary imaging modality to detect, measure, characterize and monitor brain tumours. Advanced MRI sequences such as perfusion MRI, diffusion MRI and spectroscopy as well as new post-processing techniques such as automatic segmentation of tumours and radiomics play a crucial role in characterization and follow up of brain tumours. The purpose of this review is to provide an overview on anatomical and functional MRI use for brain tumours boundaries determination and tumour characterization in the specific context of radiotherapy. The usefulness of anatomical and functional MRI on particular challenges posed by radiotherapy such as pseudo progression and pseudo esponse and new treatment strategies such as dose painting is also described.
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Affiliation(s)
- J Benzakoun
- Radiology Department, GHU de Paris, centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France; Université de Paris, 85, boulevard Saint-Germain, 75006 Paris, France; Imabrain, Institut de psychiatrie et neurosciences de Paris (IPNP), 102-108, rue de la Santé, 75014 Paris, France; Inserm, U1266, 102, rue de la Santé, 75013 Paris, France.
| | - C Robert
- Medical Physics Department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94805 Villejuif, France; Molecular Radiotherapy, Gustave-Roussy, 114, rue Édouard-Vaillant, 94805 Villejuif, France; Inserm, 114, rue Édouard-Vaillant, 94805 Villejuif, France; Paris-Sud University, Paris-Saclay University, 114, rue Édouard-Vaillant, 94805 Villejuif, France
| | - L Legrand
- Radiology Department, GHU de Paris, centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France; Université de Paris, 85, boulevard Saint-Germain, 75006 Paris, France; Imabrain, Institut de psychiatrie et neurosciences de Paris (IPNP), 102-108, rue de la Santé, 75014 Paris, France; Inserm, U1266, 102, rue de la Santé, 75013 Paris, France
| | - J Pallud
- Université de Paris, 85, boulevard Saint-Germain, 75006 Paris, France; Imabrain, Institut de psychiatrie et neurosciences de Paris (IPNP), 102-108, rue de la Santé, 75014 Paris, France; Inserm, U1266, 102, rue de la Santé, 75013 Paris, France; Neurosurgery Department, GHU de Paris, centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France
| | - J-F Meder
- Radiology Department, GHU de Paris, centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France; Université de Paris, 85, boulevard Saint-Germain, 75006 Paris, France; Imabrain, Institut de psychiatrie et neurosciences de Paris (IPNP), 102-108, rue de la Santé, 75014 Paris, France; Inserm, U1266, 102, rue de la Santé, 75013 Paris, France
| | - C Oppenheim
- Radiology Department, GHU de Paris, centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France; Université de Paris, 85, boulevard Saint-Germain, 75006 Paris, France; Imabrain, Institut de psychiatrie et neurosciences de Paris (IPNP), 102-108, rue de la Santé, 75014 Paris, France; Inserm, U1266, 102, rue de la Santé, 75013 Paris, France
| | - F Dhermain
- Radiotherapy Department, Gustave-Roussy, 114, rue Édouard-Vaillant, 94805 Villejuif, France
| | - M Edjlali
- Radiology Department, GHU de Paris, centre hospitalier Sainte-Anne, 1, rue Cabanis, 75014 Paris, France; Université de Paris, 85, boulevard Saint-Germain, 75006 Paris, France; Imabrain, Institut de psychiatrie et neurosciences de Paris (IPNP), 102-108, rue de la Santé, 75014 Paris, France; Inserm, U1266, 102, rue de la Santé, 75013 Paris, France
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9
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Legrand L, Shu Q, Tedesco M, Dykstra J, Hamelers H. Role of ion exchange membranes and capacitive electrodes in membrane capacitive deionization (MCDI) for CO2 capture. J Colloid Interface Sci 2020; 564:478-490. [DOI: 10.1016/j.jcis.2019.12.039] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/10/2019] [Accepted: 12/11/2019] [Indexed: 11/28/2022]
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10
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Provost C, Lion S, Lebel R, Benzakoun J, Legrand L, Calvet D, Bartolucci P, Edjlali M, Oppenheim C. ASL avec délais post-marquage multiples : un meilleur biomarqueur de perfusion cérébrale dans la vasculopathie drépanocytaire ? J Neuroradiol 2020. [DOI: 10.1016/j.neurad.2019.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Allaert FA, Legrand L, Abdoul Carime N, Quantin C. Will applications on smartphones allow a generalization of telemedicine? BMC Med Inform Decis Mak 2020; 20:30. [PMID: 32046699 PMCID: PMC7014733 DOI: 10.1186/s12911-020-1036-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/27/2020] [Indexed: 12/17/2022] Open
Abstract
Background Telemedicine is one of the healthcare sectors that has developed the most in recent years. Currently, telemedicine is mostly used for patients who have difficulty attending medical consultations because of where they live (teleconsultation) or for specialist referrals when no specialist of a given discipline is locally available (telexpertise). However, the use of specific equipment (with dedicated cameras, screens, and computers) and the need for institutional infrastructure made the deployment and use of these systems expensive and rigid. Although many telemedicine systems have been tested, most have not generally gone beyond local projects. Our hypothesis is that the use of smartphones will allow health care providers to overcome some of the limitations that we have exposed, thus allowing the generalization of telemedicine. Main body This paper addresses the problem of telemedicine applications, the market of which is growing fast. Their development may completely transform the organization of healthcare systems, change the way patients are managed and revolutionize prevention. This new organization should facilitate the lives of both patients and doctors. In this paper, we examine why telemedicine has failed for years to take its rightful place in many European healthcare systems although there was a real need. By developing the example of France, this article analyses the reasons most commonly put forth: the administrative and legal difficulties, and the lack of funding. We argue that the real reason telemedicine struggled to find its place was because the technology was not close enough to the patient. Conclusion Finally, we explain how the development of smartphones and their current ubiquitousness should allow the generalization of telemedicine in France and on a global scale.
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Affiliation(s)
- F A Allaert
- Chaire d'évaluation Médicale des Allégations de Santé BSB et groupe CEN, Dijon, France.,Service de Biostatistiques et d'Information Médicale (DIM), CHRU Dijon; Univ. Bourgogne Franche-Comté, F-21000, Dijon, France
| | - L Legrand
- Service de Biostatistiques et d'Information Médicale (DIM), CHRU Dijon; Univ. Bourgogne Franche-Comté, F-21000, Dijon, France.,Laboratoire ImViA, EA 7535, UFR des Sciences de Santé, Université de Bourgogne Franche-Comté, Besançon, France
| | - N Abdoul Carime
- Service de Biostatistiques et d'Information Médicale (DIM), CHRU Dijon; Univ. Bourgogne Franche-Comté, F-21000, Dijon, France
| | - C Quantin
- Service de Biostatistiques et d'Information Médicale (DIM), CHRU Dijon; Univ. Bourgogne Franche-Comté, F-21000, Dijon, France. .,Laboratoire ImViA, EA 7535, UFR des Sciences de Santé, Université de Bourgogne Franche-Comté, Besançon, France. .,INSERM Clinical Investigation Center, clinical epidemiology/ clinical trials unit, CIC 1432 Dijon University Hospital, Dijon, France. .,Biostatistics, Biomathematics, Pharmacoepidemiology and Infectious Diseases (B2PHI), INSERM, UVSQ, Institut Pasteur, Université Paris-Saclay, Paris, France. .,Service de Biostatistique et d'Informatique Médicale - BP 77908, CHU de Dijon, CEDEX, 21079, Dijon, France.
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12
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Lattuca B, Bouziri N, Portal JJ, Zhou J, Zeitouni M, Kerneis M, Guedeney P, Legrand L, Hammoudi N, Isnard R, Pousset F, Collet JP, Vicaut E, Montalescot G, Silvain J. P6454Antithrombotic therapy and cardiovascular events in patients with left ventricular thrombus. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.1047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Left Ventricular Thrombus (LVT) is associated with a high risk of thromboembolic complications such as stroke. Contemporary data are lacking on the management, prognosis and treatment of LVT, particularly with the emergence of the non-vitamin K antagonist anticoagulants (NOACs).
Purpose
To study the time and predictive factors associated with thrombus regression on treatment and its association with survival, embolic and bleeding complications.
Methods
From January 2011 to January 2018, a computerized case sensitive search of LVT was performed on 90 065 consecutive echocardiogram reports. All patients with a confirmed LVT were included in this analysis after imaging review by two independent experts. Repeated echocardiographic data, treatment management and clinical outcomes were collected during follow-up. Major adverse cardiac events (MACE), defined as the composite of death, ischemic stroke or transient ischemic attack (TIA), myocardial infarction (MI) or embolic peripheral artery occlusion were analyzed as well as major bleeding events (BARC ≥3) and the predictive factors and impact of LVT regression.
Results
We identified 174 patients with a suspected LVT of whom 159 had confirmed LVT on two different cardiac imaging exams. Ischemic cardiomyopathy was the main cause of LVT (n=125, 78.6%) including 56 (35.2%) patients with an acute ST segment elevation MI. The mean left ventricular ejection fraction was 31.9±12.5% with predominant (98.1%) apical location of the LVT.
Anticoagulation therapy was achieved with vitamin K antagonists, NOACs and parenteral heparins in 48.7%, 22.8% and 27.8% of patients, respectively. Concomitant antiplatelet therapy was prescribed in 67.9% of patients. Total LVT regression was reached in two third of patients (62.3%, n=99) within a median time of 103 [32–392] days. Independent predictors of total LVT regression were an ischemic cardiomyopathy (HR: 0.36 [0.19–0.70], p=0.002), a larger baseline thrombus area (HR=0.66 [0.45–0.96], p<0.031) and a prolonged anticoagulation therapy over 3 months (HR=0.11 [0.05–0.22], p<0.0001).
During a median follow-up of 632 [187–1126] days, MACE occurred in 59 (37.1%) patients with a 18.9% rate of mortality and 13.2% of major bleeding. Patients with a total LVT regression had a non-significant lower rate of MACE as compared with patients without total LVT regression (35.4% vs. 40.0%; HR=0.71 [0.42–1.21]; p=0.20), and a significant lower rate of mortality (15.2% vs. 25.0%; HR=0.48 [0.23–0.98]; p=0.039).
Occurence of mortality (A) and MACE (B)
Conclusions
The prognosis of LVT remains severe with a high risk of major cardiovascular event and mortality. Total LVT regression, mostly reached in 3 months, can be obtained with both vitamin K antagonists and NOACs and is associated with a better prognosis.
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Affiliation(s)
- B Lattuca
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - N Bouziri
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - J J Portal
- ACTION Study Group, Unité de Recherche Clinique, Lariboisière Hospital (APHP), Paris, France
| | - J Zhou
- Information system department, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - M Zeitouni
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - M Kerneis
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - P Guedeney
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - L Legrand
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - N Hammoudi
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - R Isnard
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - F Pousset
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - J P Collet
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - E Vicaut
- ACTION Study Group, Unité de Recherche Clinique, Lariboisière Hospital (APHP), Paris, France
| | - G Montalescot
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
| | - J Silvain
- Sorbonne Université, ACTION Study Group, INSERM UMR_S 1166, Institut de Cardiologie, Pitié-Salpêtrière Hospital (AP-HP), Paris, France
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13
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Heuze C, Legrand L, Diallo A, Monin ML, Ewenczyk C, Isnard R, Vicaut E, Durr A, Pousset F. P903Is left ventricular longitudinal strain a good pronostic factor in friedreich ataxia? Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Friedreich ataxia (FRDA) is a rare genetic sensory ataxia. The causal mutation is an expanded trinucleotide repeat (GAA) in the frataxin gene. Hypertrophic cardiomyopathy is associated with FRDA and is the major cause of early death before 40 years old. Patients with progressive decline of the left ventricular ejection fraction (LVEF) have the worse prognosis. Speckle tracking echography with 2D longitudinal myocardial strain (GLS) is recognized as a more effective technique than conventional LVEF in detecting subtle changes in LV function.
Purpose
Evaluate the prognostic value of global longitudinal strain (GLS) in patients with FRDA as compared to LVEF.
Methods
From 2003 to 2017 consecutive patients with genetically confirmed FRDA were included. Longitudinal strain analysis was retrospectively performed with Tomtec software. News were obtained until April 2018, no patient was lost during follow-up.
Results
The study included 156 patients (51% male) of 35±12 years (mean ± SD) with an age at disease onset of 17±11 years, age at wheelchair use of 26±10 years, and GAA repeat on the shorter allele of 590±241 pb. The following echocardiographic parameters were studied at baseline: LVEF 64±9%, GLS −19.8±5% (n=141), septal wall thickness (SWT) 11.4±2.5 mm, posterior wall thickness (PWT) 10.4±1.8 mm, LV end diastolic diameter (LVEDD) 44.4±6mm. Correlation between GLS and LVEF was 0.31 (p=0.0002).
After a mean follow-up of 7.7±4.0 years, 17 (11%) patients died and the outcome (cardiac arrhythmia, heart failure, stroke or death) concerned 28 (18%) patients. In univariate analysis (Cox model), factors associated with mortality were: GLS (HR: 1.2; 95% CI 1.10–1.32, p=0.0001), LVEF (HR: 0.88; 95% CI 0.85–0.92, p<0.0001), GAA (HR: 1.28; 95% CI 1.11–1.47, p=0.0008), age at onset (HR: 0.84; 95% CI 0.76–0.94, p=0.002), LVMi (HR: 1.02; 95% CI 1.01–1.04, p=0.0078), SWT (HR: 1.18 95% CI 1.01–1.36, p=0.03) and LVEDD (HR: 1.09; 95% CI 1.00–1.19, p=0.04). In multivariate analysis LVEF was the only independent predictor of long-term mortality (HR: 0.93; 95% CI 0.88; 0.99, p=0.02). Similarly GLS was not an independent predictor of the composite outcome in multivariate analysis.
Conclusion
GLS is a predictor of morbimortality but is not superior to LVEF in FRDA patients. Further prospective studies are mandatory to assess the early predictive value of 2D GLS.
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Affiliation(s)
- C Heuze
- Sorbonne University, Department of Cardiology, Pitié-Salpêtrière (AP-HP) Hospital, Paris, France
| | - L Legrand
- Sorbonne University, Department of Cardiology, Pitié-Salpêtrière (AP-HP) Hospital, Paris, France
| | - A Diallo
- ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, URC Lariboisière, Paris, France
| | - M L Monin
- Sorbonne University, Department of Genetics and ICM (Brain and Spine Institute),, Paris, France
| | - C Ewenczyk
- Sorbonne University, Department of Genetics, Pitié-Salpêtrière (AP-HP) Hospital, Paris, France
| | - R Isnard
- Sorbonne University, Department of Cardiology, Pitié-Salpêtrière (AP-HP) Hospital, Paris, France
| | - E Vicaut
- ACTION (Allies in Cardiovascular Trials Initiatives and Organized Networks) Group, URC Lariboisière, Paris, France
| | - A Durr
- Sorbonne University, Department of Genetics and ICM (Brain and Spine Institute),, Paris, France
| | - F Pousset
- Sorbonne University, Department of Cardiology, Pitié-Salpêtrière (AP-HP) Hospital, Paris, France
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Heuze C, Legrand L, Diallo A, Monin M, Ewenczyk C, Isnard R, Vicaut E, Durr A, Pousset F. Is left ventricular longitudinal strain a good prognostic factor in Friedreich ataxia? Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.04.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
Capture of CO2, originating from both fossil fuels, such as coal combustion, and from renewables, such as biogas, appears to be one of the greatest technological challenges of this century. In this study, we show that membrane capacitive deionization (MCDI) can be used to capture CO2 as bicarbonate and carbonate ions produced from the reaction of CO2 with water. This novel approach allows capturing CO2 at room temperature and atmospheric pressure without the use of chemicals. In this process, the adsorption and desorption of bicarbonate ions from the deionized water solution drive the CO2(g) absorption-desorption from the gas phase. In this work, the effects of the current density and the CO2 partial pressure were studied. We found that between 55 and 75% of the electrical charge of the capacitive electrodes can be directly used to absorb CO2 gas. The energy requirement of such a system was found to be ≈40 kJ mol-1 at 15% CO2 and could be further improved by reducing the ohmic and non-ohmic energy losses of the MCDI cell.
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Affiliation(s)
- L Legrand
- Wetsus, European Centre of Excellence for Sustainable Water Technology , Oostergoweg 7 , 8911 MA Leeuwarden , The Netherlands
- Department of Environmental Technology , Wageningen University , Bornse Weilanden 9 , 6708 WG Wageningen , The Netherlands
| | - O Schaetzle
- Wetsus, European Centre of Excellence for Sustainable Water Technology , Oostergoweg 7 , 8911 MA Leeuwarden , The Netherlands
| | - R C F de Kler
- Wetsus, European Centre of Excellence for Sustainable Water Technology , Oostergoweg 7 , 8911 MA Leeuwarden , The Netherlands
| | - H V M Hamelers
- Wetsus, European Centre of Excellence for Sustainable Water Technology , Oostergoweg 7 , 8911 MA Leeuwarden , The Netherlands
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16
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Benzakoun J, Maïer B, Calvet D, Edjlali M, Turc G, Lion S, Legrand L, Ben Hassen W, Naggara O, Meder J, Mas J, Oppenheim C. Erratum to “Can a 15 s FLAIR replace conventional FLAIR sequence in stroke MR protocols?” [J Neuroradiol 44 (2017) 192–197]. J Neuroradiol 2018; 45:66. [DOI: 10.1016/j.neurad.2018.01.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Mahdjoub E, Turc G, Legrand L, Benzakoun J, Edjlali M, Seners P, Charron S, Ben Hassen W, Naggara O, Meder JF, Mas JL, Baron JC, Oppenheim C. Do Fluid-Attenuated Inversion Recovery Vascular Hyperintensities Represent Good Collaterals before Reperfusion Therapy? AJNR Am J Neuroradiol 2017; 39:77-83. [PMID: 29074634 DOI: 10.3174/ajnr.a5431] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 08/24/2017] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In acute ischemic stroke, whether FLAIR vascular hyperintensities represent good or poor collaterals remains controversial. We hypothesized that extensive FLAIR vascular hyperintensities correspond to good collaterals, as indirectly assessed by the hypoperfusion intensity ratio. MATERIALS AND METHODS We included 244 consecutive patients eligible for reperfusion therapy with MCA stroke and pretreatment MR imaging with both FLAIR and PWI. The FLAIR vascular hyperintensity score was based on ASPECTS, ranging from 0 (no FLAIR vascular hyperintensity) to 7 (FLAIR vascular hyperintensities abutting all ASPECTS cortical areas). The hypoperfusion intensity ratio was defined as the ratio of the time-to-maximum >10-second over time-to-maximum >6-second lesion volumes. The median hypoperfusion intensity ratio was used to dichotomize good (low hypoperfusion intensity ratio) versus poor (high hypoperfusion intensity ratio) collaterals. We then studied the association between FLAIR vascular hyperintensity extent and hypoperfusion intensity ratio. RESULTS Hypoperfusion was present in all patients, with a median hypoperfusion intensity ratio of 0.35 (interquartile range, 0.19-0.48). The median FLAIR vascular hyperintensity score was 4 (interquartile range, 3-5). The FLAIR vascular hyperintensities were more extensive in patients with good collaterals (hypoperfusion intensity ratio ≤0.35) than with poor collaterals (hypoperfusion intensity ratio >0.35; P for Trend = .016). The FLAIR vascular hyperintensity score was independently associated with good collaterals (P for Trend = .002). CONCLUSIONS In patients eligible for reperfusion therapy, FLAIR vascular hyperintensity extent was associated with good collaterals, as assessed by the pretreatment hypoperfusion intensity ratio. The ASPECTS assessment of FLAIR vascular hyperintensities could be used to rapidly identify patients more likely to benefit from reperfusion therapy.
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Affiliation(s)
- E Mahdjoub
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - G Turc
- Neurology (G.T., P.S., J.-L.M., J.-C.B.), Université Paris Descartes, Institut national de la santé et de la recherche médicale S894, Département Hospitalo-Universitaire Neurovasc, Centre Hospitalier Sainte-Anne, Paris, France
| | - L Legrand
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - J Benzakoun
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - M Edjlali
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - P Seners
- Neurology (G.T., P.S., J.-L.M., J.-C.B.), Université Paris Descartes, Institut national de la santé et de la recherche médicale S894, Département Hospitalo-Universitaire Neurovasc, Centre Hospitalier Sainte-Anne, Paris, France
| | - S Charron
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - W Ben Hassen
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - O Naggara
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - J-F Meder
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
| | - J-L Mas
- Neurology (G.T., P.S., J.-L.M., J.-C.B.), Université Paris Descartes, Institut national de la santé et de la recherche médicale S894, Département Hospitalo-Universitaire Neurovasc, Centre Hospitalier Sainte-Anne, Paris, France
| | - J-C Baron
- Neurology (G.T., P.S., J.-L.M., J.-C.B.), Université Paris Descartes, Institut national de la santé et de la recherche médicale S894, Département Hospitalo-Universitaire Neurovasc, Centre Hospitalier Sainte-Anne, Paris, France
| | - C Oppenheim
- From the Departments of Radiology (E.M., L.L., J.B., M.E., S.C., W.B.H., O.N., J.-F.M., C.O.)
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Laabassi F, Hue E, Fortier C, Morilland E, Legrand L, Hans A, Pronost S. Epidemiology and molecular detection of equine herpesviruses in western Algeria in 2011. Vet Microbiol 2017; 207:205-209. [PMID: 28757025 DOI: 10.1016/j.vetmic.2017.06.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 06/23/2017] [Accepted: 06/23/2017] [Indexed: 11/15/2022]
Abstract
An episode of acute equine respiratory infection was reported in western Algeria (Tiaret province) between February and March 2011, affecting a large population of horses. Nasal swabs (n=100) were taken from horses aged between 1 and 27 years, presenting with cough and mucopurulent nasal discharge. The prevalence of equine respiratory virus infections was examined using quantitative polymerase chain reaction (qPCR). One, or more, of four equine respiratory viruses were detected in the nasal swabs of 90 of 100 horses (90%) and the detection rate of equine herpesvirus type 1 (EHV-1), equine herpesvirus type 4 (EHV-4), equine herpesvirus type 2 (EHV-2) and equine herpesvirus type 5 (EHV-5) were 2%, 14%, 90% and 75%, respectively. Equine influenza virus and equine arteritis virus were not detected in any samples. Among the 90 infected horses, 70 were co-infected with EHV-2 and EHV-5 and 14 others were co-infected with EHV-4, EHV-2 and EHV-5. The present study shows a positivity rate of 97.3% for EHV-5 in young horses aged <3years; a finding which decreased with age. Viral load of EHV-5 was significantly higher in <3years whereas no effect of age was observed with EHV-2. The study shows that equine herpesviruses 1, 2, 4 and 5 are endemic in horse populations from Algeria as detected for the first time by qPCR.
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Affiliation(s)
- F Laabassi
- ESPA Laboratory, Department of Veterinary, Institute of Veterinary Sciences and Agronomics Sciences, University of Batna-1, 05000 Batna, Algeria.
| | - E Hue
- LABÉO-Frank Duncombe,1 route de Rosel, 14053 CAEN Cedex 4, France; Caen Normandy University, France, UNICAEN EA7450 BioTARGen, 3 rue Nelson Mandela, 14280 Saint-Contest, France.
| | - C Fortier
- LABÉO-Frank Duncombe,1 route de Rosel, 14053 CAEN Cedex 4, France; Caen Normandy University, France, UNICAEN EA7450 BioTARGen, 3 rue Nelson Mandela, 14280 Saint-Contest, France.
| | - E Morilland
- Dozulé Laboratory for Equine Diseases, Virology Unit, Anses, Goustranville, 14430 Dozulé, France.
| | - L Legrand
- LABÉO-Frank Duncombe,1 route de Rosel, 14053 CAEN Cedex 4, France; Caen Normandy University, France, UNICAEN EA7450 BioTARGen, 3 rue Nelson Mandela, 14280 Saint-Contest, France.
| | - A Hans
- Dozulé Laboratory for Equine Diseases, Virology Unit, Anses, Goustranville, 14430 Dozulé, France.
| | - S Pronost
- LABÉO-Frank Duncombe,1 route de Rosel, 14053 CAEN Cedex 4, France; Caen Normandy University, France, UNICAEN EA7450 BioTARGen, 3 rue Nelson Mandela, 14280 Saint-Contest, France.
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Benzakoun J, Maïer B, Calvet D, Edjlali M, Turc G, Lion S, Legrand L, Ben Hassen W, Naggara O, Meder J, Mas J, Oppenheim C. Can a 15-sec FLAIR replace conventional FLAIR sequence in stroke MR protocols? J Neuroradiol 2017; 44:192-197. [DOI: 10.1016/j.neurad.2016.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/10/2016] [Accepted: 11/21/2016] [Indexed: 10/20/2022]
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20
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Mellerio C, Charron S, Lion S, Roca P, Kuchcinski G, Legrand L, Edjlali M, Naggara O, Meder JF, Pallud J, Oppenheim C. Perioperative functional neuroimaging of gliomas in eloquent brain areas. Neurochirurgie 2017; 63:129-134. [DOI: 10.1016/j.neuchi.2016.10.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 10/10/2016] [Accepted: 10/31/2016] [Indexed: 11/25/2022]
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21
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Broux B, Gryspeerdt A, Amory H, Frippiat T, Gasthuys F, Legrand L, Deprez P. Prevalence of respiratory pathogens in nasal swabs from horses with acute respiratory disease in Belgium. VLAAMS DIERGEN TIJDS 2016. [DOI: 10.21825/vdt.v85i4.16332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Contagious respiratory infections are an important cause of respiratory disease in horses, resulting in impaired pulmonary function, poor performance and sometimes severe illness. Although bacterial infections are often suspected to be involved, viruses are frequently overlooked and are an underestimated cause of respiratory disease outbreaks in horses. In this study, nasal swabs of 103 horses with acute symptoms of respiratory disease were analyzed for the presence of 13 different respiratory pathogens. Gamma herpesviruses were the most commonly detected, with 60% of the samples being positive, followed by streptococcus equi subsp. zooepidemicus infection (30%). Rhinovirus B, streptococcus equi subsp. equi, adenovirus 1 and EHV-4 were more rarely detected. Further research is necessary to correctly interpret the importance of gamma herpesviruses in horses, for example by screening a healthy control population. National surveillance of respiratory viruses in horses by PCR analysis on nasal swabs might be a useful, earlywarning system for viral epidemics.
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Garrett D, Montesso F, Prowse-Davis L, Britt S, Fougerolle S, Pronost S, Legrand L, De Bock M, Huang C, Paillot R. Refinement of the Equine Influenza model: the benefits of individual nebulisation for experimental infection. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2016.02.155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Fougerolle S, Legrand L, Foursin M, D'Ablon X, Bayssat P, Pronost S, Paillot R. Impact of Age at First Immunisation on Equine Influenza Short and Mid-Term Protective Antibody Levels in Thoroughbred Foals. Equine Vet J 2015. [DOI: 10.1111/evj.12486_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Fougerolle
- Frank Duncombe Laboratory-LABÉO; 1 route de Rosel 14053 Caen Cedex 4 France
- Normandie Université; 14000 Caen France
- Unité Risques Microbiens (U2RM); EA 4655 14032 Caen France
- Hippolia Foundation; La Maison du cheval, 6 avenue du Maréchal Montgomery 14000 Caen France
| | - L. Legrand
- Frank Duncombe Laboratory-LABÉO; 1 route de Rosel 14053 Caen Cedex 4 France
- Normandie Université; 14000 Caen France
- Unité Risques Microbiens (U2RM); EA 4655 14032 Caen France
- Hippolia Foundation; La Maison du cheval, 6 avenue du Maréchal Montgomery 14000 Caen France
| | - M. Foursin
- Clinique Equine de la Boisrie; La Boisrie 61500 Chailloué France
| | - X. D'Ablon
- Clinique Vétérinaire de la Côte Fleurie; Route de Paris - Bonneville sur Touques 14800 Deauville France
| | - P. Bayssat
- Clinique Vétérinaire de Bayeux; Route de la Cambette 14400 Bayeux France
| | - S. Pronost
- Frank Duncombe Laboratory-LABÉO; 1 route de Rosel 14053 Caen Cedex 4 France
- Normandie Université; 14000 Caen France
- Unité Risques Microbiens (U2RM); EA 4655 14032 Caen France
- Hippolia Foundation; La Maison du cheval, 6 avenue du Maréchal Montgomery 14000 Caen France
| | - R. Paillot
- Normandie Université; 14000 Caen France
- Unité Risques Microbiens (U2RM); EA 4655 14032 Caen France
- Hippolia Foundation; La Maison du cheval, 6 avenue du Maréchal Montgomery 14000 Caen France
- Animal Health Trust; Centre for Preventive Medicine; Lanwades Park, Kentford Newmarket CB8 7UU UK
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Rodriguez-Régent C, Edjlali-Goujon M, Trystram D, Boulouis G, Ben Hassen W, Godon-Hardy S, Nataf F, Machet A, Legrand L, Ladoux A, Mellerio C, Souillard-Scemama R, Oppenheim C, Meder JF, Naggara O. Non-invasive diagnosis of intracranial aneurysms. Diagn Interv Imaging 2014; 95:1163-74. [DOI: 10.1016/j.diii.2014.10.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Tisserand M, Naggara O, Legrand L, Mellerio C, Edjlali M, Lion S, Rodriguez-Régent C, Souillard-Scemama R, Jbanca CF, Trystram D, Méder JF, Oppenheim C. Patient “candidate” for thrombolysis: MRI is essential. Diagn Interv Imaging 2014; 95:1135-44. [DOI: 10.1016/j.diii.2014.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Legrand L, Tisserand M, Turc G, Naggara O, Edjlali M, Mellerio C, Mas JL, Méder JF, Baron JC, Oppenheim C. Do FLAIR vascular hyperintensities beyond the DWI lesion represent the ischemic penumbra? AJNR Am J Neuroradiol 2014; 36:269-74. [PMID: 25190202 DOI: 10.3174/ajnr.a4088] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In acute stroke with proximal artery occlusion, FLAIR vascular hyperintensities observed beyond the boundaries of the cortical lesion on DWI (newly defined "FLAIR vascular hyperintensity-DWI mismatch") may be a marker of tissue at risk of infarction. Our aim was to compare the occurrence of FLAIR vascular hyperintensity-DWI mismatch relative to that of perfusion-weighted imaging-DWI mismatch in patients with proximal MCA occlusion before IV thrombolysis. MATERIALS AND METHODS In 141 consecutive patients with proximal MCA occlusion, 2 independent observers analyzed FLAIR images for the presence of FLAIR vascular hyperintensity-DWI mismatch before IV thrombolysis. PWI-DWI mismatch was defined as Volumehypoperfusion > 1.8 × VolumeDWI, with Volumehypoperfusion > 6 seconds on time to maximum value of the residue function maps in the 94 patients with available PWI. The presence of FLAIR vascular hyperintensity-DWI mismatch, PWI-DWI mismatch, and infarct growth on 24-hour follow-up DWI was compared. RESULTS A FLAIR vascular hyperintensity-DWI mismatch was present in 102/141 (72%) patients, with an excellent interobserver reliability (κ = 0.91), and a PWI-DWI mismatch, in 61 of the 94 (65%) patients with available PWI. FLAIR vascular hyperintensity-DWI mismatch predicted PWI-DWI mismatch with a sensitivity of 92% (95% CI, 85%-99%) and a specificity of 64% (95% CI, 47%-80%). Patients with FLAIR vascular hyperintensity-DWI mismatch had smaller initial DWI lesion and larger infarct growth (P < .001) than patients without FLAIR vascular hyperintensity-DWI mismatch, even though their final infarcts remained smaller (P < .001). CONCLUSIONS Albeit being moderately specific, probably due to inclusion of oligemic tissue, the FLAIR vascular hyperintensity-DWI mismatch identifies large PWI-DWI mismatch with high sensitivity.
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Affiliation(s)
- L Legrand
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
| | - M Tisserand
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
| | - G Turc
- Neurology (G.T., J.-L.M, J.-C.B.), Université Paris Descartes Sorbonne Paris Cité, Centre de Psychiatrie et Neurosciences, Institut National de la Santé et de la Recherche Médicale S894, Centre Hospitalier Sainte-Anne, Paris, France
| | - O Naggara
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
| | - M Edjlali
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
| | - C Mellerio
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
| | - J-L Mas
- Neurology (G.T., J.-L.M, J.-C.B.), Université Paris Descartes Sorbonne Paris Cité, Centre de Psychiatrie et Neurosciences, Institut National de la Santé et de la Recherche Médicale S894, Centre Hospitalier Sainte-Anne, Paris, France
| | - J-F Méder
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
| | - J-C Baron
- Neurology (G.T., J.-L.M, J.-C.B.), Université Paris Descartes Sorbonne Paris Cité, Centre de Psychiatrie et Neurosciences, Institut National de la Santé et de la Recherche Médicale S894, Centre Hospitalier Sainte-Anne, Paris, France
| | - C Oppenheim
- From the Departments of Radiology (L.L., M.T., O.N., M.E., C.M., J.-F.M., C.O.)
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Slater J, Borchers K, Chambers T, Cullinane A, Duggan V, Elton D, Legrand L, Paillot R, Fortier G. Report of the International Equine Influenza Roundtable Expert Meeting at Le Touquet, Normandy, February 2013. Equine Vet J 2014; 46:645-50. [PMID: 25146166 DOI: 10.1111/evj.12302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J Slater
- Royal Veterinary College, London, UK
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Tisserand M, Seners P, Turc G, Legrand L, Labeyrie M, Meder J, Mas J, Baron J, Oppenheim C. Détérioration neurologique précoce inexpliquée après thrombolyse : extension de l’infarctus au-delà de la pénombre ? J Neuroradiol 2014. [DOI: 10.1016/j.neurad.2014.01.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Laabassi F, Lecouturier F, Amelot G, Gaudaire D, Mamache B, Laugier C, Legrand L, Zientara S, Hans A. Epidemiology and Genetic Characterization of H3N8 Equine Influenza Virus Responsible for Clinical Disease in Algeria in 2011. Transbound Emerg Dis 2014; 62:623-31. [PMID: 24472362 DOI: 10.1111/tbed.12209] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Indexed: 11/28/2022]
Abstract
An outbreak of equine influenza (EI) was reported in Algeria between May and July, 2011. The outbreak started in Tiaret, in west province of Algeria, and spread to the other parts of the country affecting almost 900 horses in many provinces. The population studied was composed of 325 horses from different groups of age. Clinical sign expression was age dependent. Indeed, a morbidity rate of 14.9% was observed in horses under 15 months old and a rate of 4.95% in horses over 8 years old. Interestingly, the morbidity rate raised sharply to reach 100% in horses aged between 18 months and 7 years. The virus (H3N8) was detected in nasopharyngeal swabs (n = 11) from non-vaccinated horses using a qRT-PCR targeting a portion of the gene encoding the matrix protein (M). The virus isolates were identified as H3N8 by sequencing the haemagglutinin (HA) and neuraminidase (NA) genes and were named from A/equine/Tiaret/1/2011 to A/equine/Tiaret/10/2011. Alignment of HA1 amino acid sequence confirmed that viruses belong to Clade 2 of the Florida sublineage in the American lineage. Moreover, they are closely related to A/equine/Yokohama/aq13/2010, A/equine/Eyragues/1/2010, A/equine/Bokel/2011 and A/equine/Lichtenfeld/2012. Our data indicate that this strain was also circulating in the European horse population in 2010, 2011 and 2012.
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Affiliation(s)
- F Laabassi
- Department of Veterinary Sciences, Institute of Agronomics Sciences and Veterinary Sciences, University of Mohamed Chérif Messaadia, Souk Ahras, Algeria.,ESPA Laboratory, Department of Veterinary, Institute of Veterinary Sciences and Agronomics Sciences, University of El-Hadj Lakhdar, Batna, Algeria
| | - F Lecouturier
- Equine Pathology Laboratory, Virology Unit, Anses - Dozulé, Goustranville, France
| | - G Amelot
- Equine Pathology Laboratory, Virology Unit, Anses - Dozulé, Goustranville, France
| | - D Gaudaire
- Equine Pathology Laboratory, Virology Unit, Anses - Dozulé, Goustranville, France
| | - B Mamache
- ESPA Laboratory, Department of Veterinary, Institute of Veterinary Sciences and Agronomics Sciences, University of El-Hadj Lakhdar, Batna, Algeria
| | - C Laugier
- Equine Pathology Laboratory, Virology Unit, Anses - Dozulé, Goustranville, France
| | - L Legrand
- Laboratoire Frank Duncombe, Caen, France
| | - S Zientara
- Laboratory for Animal Health, UMR1161 Anses/INRA/ENVA-UPEC, Maisons-Alfort, France
| | - A Hans
- Equine Pathology Laboratory, Virology Unit, Anses - Dozulé, Goustranville, France
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Hans A, Laabassi F, Amelot G, Legrand L, Gaudaire D, Laugier C, Pronost S, Zientara S. Serological evidence of circulation of Equine H3N8 Influenza Virus in Algeria and its molecular characterization. J Equine Vet Sci 2012. [DOI: 10.1016/j.jevs.2012.08.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Pronost S, Legrand L, Morreau P, Fortier C, Foursin M, Fortier G. Outbreak of equine herpesvirus myeloencephalopathy in france. molecular tools, a help to the management. J Equine Vet Sci 2012. [DOI: 10.1016/j.jevs.2012.08.144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Xavier M, Lalande A, Walker PM, Brunotte F, Legrand L. An Adapted Optical Flow Algorithm for Robust Quantification of Cardiac Wall Motion From Standard Cine-MR Examinations. ACTA ACUST UNITED AC 2012; 16:859-68. [DOI: 10.1109/titb.2012.2204893] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lemarie M, Compère V, Fourdrinier V, Lignot S, Legrand L, Marguerite C, Devellenne C, Wood G, Dujardin F, Dureuil B. [Evaluation of the impact of prescription analgesic during the anaesthesia consultation on the incidence of postoperative pain at home in ambulatory orthopaedic surgery]. Ann Fr Anesth Reanim 2011; 30:883-7. [PMID: 22054715 DOI: 10.1016/j.annfar.2011.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Accepted: 05/26/2011] [Indexed: 10/15/2022]
Abstract
INTRODUCTION Postoperative pain at home in ambulatory surgery is a major problem. To improve its management, the French society of anaesthesia emphasizes the importance of writing prescriptions for analgesic during the preanaesthetic consultation. The objective of this study was to assess the impact of this prescription on the incidence of postoperative pain at home in ambulatory orthopaedic surgery. PATIENT AND METHODS We conducted a prospective evaluation in the ambulatory surgery unit of Rouen University Hospital. We were able to identify two periods of 1 year with implementation of a systematic prescription of analgesics during the postoperative period (P1) or during the preanaesthetic consultation (P2). The evaluation of this measurement was made by a telephone survey conducted the day after surgery. The main parameter was the incidence of postoperative pain at home defined by the occurrence of a pain greater to 3/10 on a numerical scale (FR). Secondary parameters were demographic and anaesthetic data, the incidence of moderate pain (FR ≤ 3), treatment adherence and patient satisfaction. RESULTS We included 638 patients and 531 were analysed: 28% of patients had an EN greater than 3 the day following surgery. There is no difference between the two periods (30% for P1 versus 27% for P2). The analysis of subgroups showed that in the general anaesthesia group, 30% of patients had an EN greater than 3 for P1 versus 18% for P2 (P<0.01). Furthermore, 55% of patients expressed moderate pain (FR ≤ 3) for P1 versus 22% for P2 (P<0.01). Moreover, 89% of patients reported having an adequate analgesic treatment. The overall observance was 64%, 53% for P1 versus 75% for P2 (P<0.01). DISCUSSION The systematic prescription of analgesics during the preanaesthetic consultation does not decrease the intensity of moderate to severe pain. On the other hand, this procedure seems to be positive for the people who underwent a general anaesthesia.
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Affiliation(s)
- M Lemarie
- Département d'anesthésie-réanimation, CHU de Rouen, 1, rue de Germont, 76031 Rouen, France
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Pronost S, Legrand L, Pitel PH, Wegge B, Lissens J, Freymuth F, Richard E, Fortier G. Outbreak of equine herpesvirus myeloencephalopathy in France: a clinical and molecular investigation. Transbound Emerg Dis 2011; 59:256-63. [PMID: 21975071 DOI: 10.1111/j.1865-1682.2011.01263.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Equid herpesvirus 1 (EHV-1)-associated myeloencephalopathy (EHM) is a disease affecting the central nervous system of horses. Despite the constantly increasing interest about this syndrome, epidemiological data are limited especially when related to the description of large outbreaks. The aim of this article is to describe clinical, virological and molecular data obtained throughout a severe outbreak of EHM, with emphasis on laboratory diagnostic methods. The epidemic disease concerned a riding school in France where 7/66 horses aged 12-22 years developed signs of neurological disease in July 2009. Diagnosis of EHM was supported by EHV-1 detection using both real-time PCR and virus culture, and SNP-PCR test for viral strain characterization. EHM morbidity was 10.6% (7/66), mortality was 7.5% (5/66) and case fatality rate was 71.4% (5/7). Clinical presentation of the disease was characterized by the fact that fever was systematically present within 2 days before the severe neurological signs were noted. EHV-1 was detected by PCR in each available blood and nasal swab samples. Neuropathogenic strain only (G(2254) ) was isolated during the current outbreak; C(t) values, used as an indicative level of the viral load, ranged 26.0-37.0 among the six sampled horses. The amount of virus in biological samples was not systematically related to the intensity of the clinical signs being observed. In conclusion, this article described a severe outbreak of EHM while limited in time and restricted to one premise. Molecular data strongly suggested taking into account any low viral load as being a potential risk factor for neurological manifestations.
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Affiliation(s)
- S Pronost
- Frank Duncombe Laboratory, IFR 146 ICORE, University of Caen Basse-Normandie, Caen Cedex, France.
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Abstract
Toxoplasmosis is a disease caused by an obligate intracellular protozoal parasite, Toxoplasma gondii. It is the most common cause of focal brain lesions in patients with AIDS. The imaging features and endocrine disorders of CNS toxoplasmosis in patients with AIDS are reviewed.
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Affiliation(s)
- L Legrand
- Departments of Radiology, Antoine Beclere Hospital, Clamart, France.
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Affiliation(s)
- L. Legrand
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen, Cedex 4 France
| | - P. H. Pitel
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen, Cedex 4 France
| | - G. Fortier
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen, Cedex 4 France
| | - S. Pronost
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen, Cedex 4 France
| | - A. Cullinane
- Virology Unit; Irish Equine Centre, Johnstown; Naas County Kildare Ireland
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Lalande A, Khau Van Kien P, Walker P, Zhu L, Legrand L, Claustres M, Jeunemaître X, Brunotte F, Wolf J. Compliance and pulse wave velocity assessed by MRI detect early aortic impairment in young patients with mutation of the smooth muscle myosin heavy chain. J Magn Reson Imaging 2008; 28:1180-7. [DOI: 10.1002/jmri.21565] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Legrand L, Dausset J. The complexity of the HL-A gene product I: study of a serum produced against HL-A5 in an HL-A semi-identical situation. Tissue Antigens 2008; 4:329-45. [PMID: 4137972 DOI: 10.1111/j.1399-0039.1974.tb00259.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Antony H, Labrit A, Rouchaud J, Legrand L, Chaussé A. Study of FeII/FeIII ratio in thin films of carbonate or sulphate green rusts obtained by potentiostatic electrosynthesis. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.05.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
Le métapneumovirus humain (hMPV) est un nouveau Pneumovirinae apparenté au métapneumovirus aviaire du type C. Le génome du hMPV diffère de celui du virus respiratoire syncytial humain (RSV) par l’ordre des gènes et le manque des gènes non structuraux. Deux sous-groupes génétiques de hMPV et quatre sous-types ont été identifiés. Les infections à hMPV évoluent sous forme d’épidémies hivernales régulières, superposées à celle du RSV et d’importance à peu près égale d’une année sur l’autre. Chez les enfants hospitalisés à Caen, le hMPV est détecté dans 9,7 % des cas, après le RSV (37 %), les rhinovirus (18 %), les virus influenza (15,4 %), les adénovirus (9 %) et les virus parainfluenza (5 %). La plupart des infections à hMPV sont observées chez des enfants atteints de bronchiolites, mais par comparaison à l’infection à RSV, l’atteinte respiratoire basse et les signes de gravité sont moins fréquents. Le hMPV est très difficile à isoler en cultures des cellules. Le diagnostic a reposé jusqu’ici sur la détection moléculaire par RT–PCR. L’apparition récente des tests antigéniques permet de disposer aujourd’hui d’un test de diagnostic rapide, simple et économique.
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Affiliation(s)
- F Freymuth
- Laboratoire de virologie humaine et moléculaire, CHU, avenue Georges-Clemenceau, 14033 Caen cedex, France.
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Fodha I, Vabret A, Bouslama L, Leroux M, Legrand L, Dina J, Gouarin S, Petitjean J, Dewar J, Trabelsi A, Boujaafar N, Freymuth F. Molecular diversity of the aminoterminal region of the G protein gene of human respiratory syncytial virus subgroup B. ACTA ACUST UNITED AC 2008; 56:50-7. [DOI: 10.1016/j.patbio.2007.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2007] [Accepted: 06/13/2007] [Indexed: 10/22/2022]
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Affiliation(s)
- L. Legrand
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen Cedex 4 France
| | - P. H. Pitel
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen Cedex 4 France
| | - G. Fortier
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen Cedex 4 France
| | - S. Pronost
- Animal Health Department; Frank Duncombe Laboratory; 1 Route de Rosel 14053 Caen Cedex 4 France
| | - A. Vabret
- Laboratory of Human and Molecular Virology; University Hospital; 14033 Caen France
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Barisien T, Legrand L, Weiser G, Deschamps J, Balog M, Boury B, Dutremez S, Schott M. Exciton spectroscopy of red polydiacetylene chains in single crystals. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.07.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Legrand L, Dipanda A, Marzani F, Kardouchi M. Using Fourier local magnitude in adaptive smoothness constraints in motion estimation. Pattern Recognit Lett 2007. [DOI: 10.1016/j.patrec.2006.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Houmadi S, Coquière D, Legrand L, Fauré MC, Goldmann M, Reinaud O, Rémita S. Architecture-controlled "SMART" Calix[6]arene self-assemblies in aqueous solution. Langmuir 2007; 23:4849-55. [PMID: 17397206 DOI: 10.1021/la700271a] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Self-assemblies of a calix[6]arene (1) functionalized at the small rim by three imidazolyl arms and at the large rim by three hydrophilic sulfonato groups have been studied in water. Transmission electron microscopy, atomic force microscopy, and in situ dynamic light scattering showed that 1 forms multilamellar vesicles at a concentration equal to or higher than 10(-4) M. At pH 7.8 and 10(-4) M, the multilamellar vesicles present a relatively large polydispersity (50-250 nm in diameter). However, after sonication unilamellar vesicles of much lower polydispersity and smaller size are obtained. The impact of the pH and the presence of Ag+ ions have also been investigated. Whereas increasing the pH led to the formation of giant vesicles (450 nm), monodisperse vesicules of 50 nm were obtained at a pH (6.5) that is only slightly higher than the pKa of the tris(imidazole) core of 1. Most interestingly, in the presence of silver ions, micelles (2.5 nm large) were obtained instead of vesicles. These observations are attributable to the imidazole core in 1 that is not only sensitive to the presence of protons but also can bind a silver cation. The resulting geometrical change in the monomeric units triggers the collapse of the vesicles into micelles. This shows that the implementation of an acid-base functionality such as an imidazole group in the hydrophobic core of the amphiphilic calix[6]arene makes the aggregation architecture responsive to the pH and to metal ions.
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Affiliation(s)
- S Houmadi
- Institut des Nano-Sciences de Paris (INSP, CNRS, Université Paris VI, UMR 7588), Université Pierre et Marie Curie, Campus Boucicaut, 140 rue de Lourmel, 75015 Paris, France
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Desseree-Calais E, Legrand L. First results of a complete marker-free methodology for human gait analysis. Conf Proc IEEE Eng Med Biol Soc 2007; 2005:7455-8. [PMID: 17282005 DOI: 10.1109/iembs.2005.1616236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This paper presents a complete methodology for human gait analysis using a marker-free system. The acquisition system devised is composed of three synchronized and calibrated CCD cameras. The aim of this work is to recognize the leg of a walking human in gray level image sequences, to reconstruct it in the three dimensional space and then to analyze the movements of the body during gait activity. An articulated 3D model of the human body, based on tapered superquadric curves, is first introduced. A motion-based segmentation, using morphological operators is then applied to the image sequences in order to extract the boundaries of the leg in motion. A reconstruction process, based on the use of a Least Median of Squares (LMS) regression is next performed, in order to determine the location of the human body in 3D space. Finally, a spatial coherence is imposed on the reconstructed curves in order to better fit the anatomy of the leg and to take the articulated model into account. Each stage of the proposed methodology was tested both on synthetic images and on real world images of walking humans. After having reconstructed the 3D model of the human, some describing gait parameters were extracted and analyzed in order to detect pathologies or abnormalities.
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Affiliation(s)
- E Desseree-Calais
- LIRIS, Université Claude Bernard Lyon 143, Boulevard du 11 novembre 1918, 69622 Villeurbanne Cedex
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Petitjean-Lecherbonnier J, Vabret A, Gouarin S, Dina J, Legrand L, Freymuth F. [Mycoplasma pneumoniae infections: retrospective study in Basse-Normandie, 1997-2005. Epidemiology--diagnostic utility of serology and PCR for a rapid diagnostic]. ACTA ACUST UNITED AC 2006; 54:603-11. [PMID: 17030455 PMCID: PMC7119118 DOI: 10.1016/j.patbio.2006.07.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2006] [Accepted: 07/27/2006] [Indexed: 11/16/2022]
Abstract
But de l'étude L'objectif de cette étude est de décrire l'épidémiologie des infections à Mycoplasma pneumoniae (Mpn) en Basse-Normandie par une analyse rétrospective des résultats sérologiques et PCR, et de valider ces deux outils pour un diagnostic précoce de ces infections. Patients et méthodes De 1997 à août 2005, 6156 sérums et 6123 prélèvements respiratoires ont été réalisés chez des patients hospitalisés et analysés pour une recherche d'infection à Mpn, soit par PCR, soit par sérologie Elisa, soit par les deux. Pendant la période épidémique (2004–2005), les résultats de 1489 patients ont été analysés. Résultats Sur les neuf années, la séroprévalence moyenne se chiffre à 40,4 % et 525 cas d'infection ont été diagnostiqués par PCR et/ou sérologie, se profilant nettement sous l'aspect de deux pics épidémiques espacés de sept ans. Pendant la période épidémique, la séroprévalence augmente (50,2 %) et l'incidence est de 8,3 %. L'analyse des caractéristiques épidémiologiques des 124 cas diagnostiqués montre : une prédominance chez l'enfant et l'adulte jeune, une fréquence saisonnière estivohivernale, l'existence de co-infection virale. L'analyse des résultats chez 36 patients ayant bénéficié des deux tests diagnostiques, PCR et sérologie, montre une concordance dans seulement 41,7 % des cas. Conclusion Les infections à Mpn surviennent sur un mode endémo-épidémique, avec une incidence élevée lors des pics épidémiques, particulièrement chez l'enfant. Nous disposons actuellement d'outils bactériologiques performants permettant de réaliser un diagnostic précoce et fiable. Chez l'enfant, il convient d'associer une sérologie (IgM) et une PCR sur un prélèvement nasopharyngé ; chez l'adulte il faudra privilégier la PCR.
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Affiliation(s)
- J Petitjean-Lecherbonnier
- Laboratoire de virologie humaine et moléculaire, hôpital universitaire, avenue Georges-Clémenceau, 14033 Caen, France.
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Lalande A, Salvé N, Comte A, Jaulent MC, Legrand L, Walker PM, Cottin Y, Wolf JE, Brunotte F. Left ventricular ejection fraction calculation from automatically selected and processed diastolic and systolic frames in short-axis cine-MRI. J Cardiovasc Magn Reson 2006; 6:817-27. [PMID: 15646885 DOI: 10.1081/jcmr-200036143] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
The calculation of the left ventricular ejection fraction (LVEF) is dependent upon the accurate measurement of diastolic and systolic left ventricular volumes. Although breath-hold cine magnetic resonance imaging (MRI) allows coverage of the whole cardiac cycle with an excellent time resolution, many authors rely on the visual selection of diastolic and the systolic short-axis slices in order to reduce the postprocessing time. An automatic method was developed to detect the endocardial contour on each image, allowing an automatic selection of the systolic frame. The calculated ejection fraction was compared with radionuclide ventriculography (RNV). Sixty-five patients were examined using an electrocardiogram (ECG)-gated gradient echo sequence. Among these examinations, manual and automatic processing with MRI were compared when the time of the systolic frame concorded. Good correlations have been found between the automatic MRI approach and RNV, and between manual and automatic processing on MRI alone. The results show that the automatic determination of the ejection fraction is feasible, and should constitute an important step toward a larger acceptance of MRI as a routine tool in heart disease imaging. One major benefit of using automatic postprocessing is that it may eliminate the visual choice of the systolic frame, inaccurate in more than 50% of the studied patients.
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Affiliation(s)
- Alain Lalande
- Laboratoire de Biophysique, Faculté de Médecine, Université de Bourgogne, Dijon Cedex, France.
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Prigent H, Orlikowski D, Blumen MB, Leroux K, Legrand L, Lejaille M, Falaize L, Ruquet M, Raphael JC, Lofaso F. Characteristics of tracheostomy phonation valves. Eur Respir J 2006; 27:992-6. [PMID: 16707394 DOI: 10.1183/09031936.06.00009405] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Phonation valves are commonly used devices that allow the restoration of speech in tracheostomised patients. However, their use should not compromise the physiological benefit of tracheostomy. Six commercialised phonation valves were studied in a dynamic set-up simulating a respiratory frequency of 20 breaths.min(-1), a tidal volume of 0.5 L and a peak flow rate of 0.5 L.s(-1). Resistance and additional work of breathing (WOB) were calculated. In 10 tracheostomised patients, evaluations using no phonation valve (baseline), and the most and one of the least resistive valves were carried out. Respiratory patterns and gas exchanges were recorded. Inspiratory difficulty was evaluated using the modified Borg scale. Valves displayed a wide array of resistance ranging 1.3-5.9 cmH2O.L(-1).s(-1). Additional WOB varied with a ratio of 4.4 between the best and the worst valve. While the different clinical conditions did not modify respiratory patterns and gas exchanges, a significant effect on the Borg scale rating was observed using ANOVA and post hoc analysis of baseline versus worst valve and one of the best valves versus worst valve. In conclusion, the variety of aerodynamic characteristics of phonation valves should be considered when choosing the device, according to the underlying condition of the patients benefiting from their use.
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Affiliation(s)
- H Prigent
- Service de Réanimation Médicale, Hôpital Raymond Poincaré, 92380 Garches, France
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Antony H, Legrand L, Maréchal L, Perrin S, Dillmann P, Chaussé A. Study of lepidocrocite γ-FeOOH electrochemical reduction in neutral and slightly alkaline solutions at 25°C. Electrochim Acta 2005. [DOI: 10.1016/j.electacta.2005.05.049] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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