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Swinnen L, Chatzichristos C, Jansen K, Lagae L, Depondt C, Seynaeve L, Vancaester E, Van Dycke A, Macea J, Vandecasteele K, Broux V, De Vos M, Van Paesschen W. Accurate detection of typical absence seizures in adults and children using a two-channel electroencephalographic wearable behind the ears. Epilepsia 2021; 62:2741-2752. [PMID: 34490891 PMCID: PMC9292701 DOI: 10.1111/epi.17061] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/09/2021] [Accepted: 08/23/2021] [Indexed: 01/17/2023]
Abstract
OBJECTIVE Patients with absence epilepsy sensitivity <10% of their absences. The clinical gold standard to assess absence epilepsy is a 24-h electroencephalographic (EEG) recording, which is expensive, obtrusive, and time-consuming to review. We aimed to (1) investigate the performance of an unobtrusive, two-channel behind-the-ear EEG-based wearable, the Sensor Dot (SD), to detect typical absences in adults and children; and (2) develop a sensitive patient-specific absence seizure detection algorithm to reduce the review time of the recordings. METHODS We recruited 12 patients (median age = 21 years, range = 8-50; seven female) who were admitted to the epilepsy monitoring units of University Hospitals Leuven for a 24-h 25-channel video-EEG recording to assess their refractory typical absences. Four additional behind-the-ear electrodes were attached for concomitant recording with the SD. Typical absences were defined as 3-Hz spike-and-wave discharges on EEG, lasting 3 s or longer. Seizures on SD were blindly annotated on the full recording and on the algorithm-labeled file and consequently compared to 25-channel EEG annotations. Patients or caregivers were asked to keep a seizure diary. Performance of the SD and seizure diary were measured using the F1 score. RESULTS We concomitantly recorded 284 absences on video-EEG and SD. Our absence detection algorithm had a sensitivity of .983 and false positives per hour rate of .9138. Blind reading of full SD data resulted in sensitivity of .81, precision of .89, and F1 score of .73, whereas review of the algorithm-labeled files resulted in scores of .83, .89, and .87, respectively. Patient self-reporting gave sensitivity of .08, precision of 1.00, and F1 score of .15. SIGNIFICANCE Using the wearable SD, epileptologists were able to reliably detect typical absence seizures. Our automated absence detection algorithm reduced the review time of a 24-h recording from 1-2 h to around 5-10 min.
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Affiliation(s)
- Lauren Swinnen
- Laboratory for Epilepsy Research, KU Leuven and Department of Neurology, University Hospitals, Leuven, Belgium
| | - Christos Chatzichristos
- Department of Electrical Engineering, STADIUS Center for Dynamical Systems, Signal Processing and Data Analytics, KU Leuven, Leuven, Belgium
| | - Katrien Jansen
- Department Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Lieven Lagae
- Department Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Chantal Depondt
- Department of Neurology, Hôpital Erasme, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Laura Seynaeve
- Department of Neurology, Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium.,Neuroprotection and Neuromodulation, Center for Neurosciences (C4N), Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | | | | | - Jaiver Macea
- Laboratory for Epilepsy Research, KU Leuven and Department of Neurology, University Hospitals, Leuven, Belgium
| | - Kaat Vandecasteele
- Department of Electrical Engineering, STADIUS Center for Dynamical Systems, Signal Processing and Data Analytics, KU Leuven, Leuven, Belgium
| | - Victoria Broux
- Laboratory for Epilepsy Research, KU Leuven and Department of Neurology, University Hospitals, Leuven, Belgium
| | - Maarten De Vos
- Department of Electrical Engineering, STADIUS Center for Dynamical Systems, Signal Processing and Data Analytics, KU Leuven, Leuven, Belgium.,Department Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Wim Van Paesschen
- Laboratory for Epilepsy Research, KU Leuven and Department of Neurology, University Hospitals, Leuven, Belgium
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3
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Cheng B, Boutitie F, Nickel A, Wouters A, Cho TH, Ebinger M, Endres M, Fiebach JB, Fiehler J, Galinovic I, Puig J, Thijs V, Lemmens R, Muir KW, Nighoghossian N, Pedraza S, Simonsen CZ, Gerloff C, Thomalla G, Golsari A, Alegiani A, Beck C, Choe CU, Voget D, Hoppe J, Schröder J, Rozanski M, Nave AH, Wollboldt C, van Sloten I, Göhler J, Herm J, Jungehülsing J, Lückl J, Kröber JM, Schurig J, Koehler L, Schlemm L, Knops M, Roennefarth M, Ipsen N, Harmel P, Bathe-Peters R, Fleischmann R, Ganeshan R, Geran R, Hellwig S, Schmidt S, Tütüncü S, Krause T, Gramse V, Röther J, Michels P, Michalski D, Pelz J, Schulz A, Hobohm C, Weise C, Weise G, Orthgieß J, Pomrehn K, Wegscheider M, Mueller AK, Hennerici M, Griebe M, Alonso A, Filipov A, Marzina A, Anders B, Bähr C, Hoyer C, Schwarzbach C, Weber C, Hornberger E, Pledl HW, Klockziem M, Stuermlinger M, Wittayer M, Wolf M, Meyer N, Eisele P, Steinert S, Sauer T, Held V, Ringleb P, Nagel S, Veltkamp R, Schwarting S, Schwarz A, Gumbinger C, Hametner C, Amiri H, Purrucker J, Ciatipis M, Menn O, Mundiyanapurath S, Schieber S, Kessler T, Reiff T, Panitz V, Singer O, Foerch C, Lauer A, Männer A, Seiler A, Guerzoglu D, Schäfer JH, Filipski K, Lorenz M, Kurka N, Zeiner P, Pfeilschifter W, Dziewas R, Minnerup J, Albiker C, Ritter M, Seidel M, Dittrich R, Kallmünzer B, Bobinger T, Madzar D, Stark D, Sembill J, Macha K, Winder K, Breuer L, Koehrmann M, Spruegel M, Gerner S, Kraft P, Mackenrodt D, Kleinschnitz C, Elhfnawy A, Heinen F, Gunreben I, Poli S, Ziemann U, Gaenslen A, Schlak D, Haertig F, Russo F, Richter H, Ebner M, Ribitsch M, Wolf M, Weimar C, Zegarac V, Chen HC, Althaus K, Neugebauer H, Jüttler E, Meier J, Stösser S, Puetz V, Bodechtel U, Ostergaard L, Møller A, Damgaard D, Dupont KH, Poulsen M, Hjort N, de Morales NR, von Weitzel P, Harbo T, Marstrand J, Hansen A, Christensen H, Aegidius K, Jeppesen L, Meden P, Rosenbaum S, Iversen H, Hansen J, Michelsen L, Truelsen T, Modrau B, Vestergaard K, Oppel L, Sygehus A, Aalborg S, Swinnen B, Smets I, Demeestere J, Dobbels L, Brouns R, De Smedt A, DeKeyser J, Yperzeele L, Van Hooff RJ, Peeters A, Dusart A, Etexberria A, Hanseeuw B, London F, Leempoel J, Hohenbichler K, Younan N, Maqueda V, Laloux P, De Coene B, De Maeseneire C, Turine G, Vandermeeren Y, De Klippel N, Willems C, de Hollander I, Soors P, Hermans S, Hemelsoet D, Desfontaines P, Vanacker P, Rutgers M, Druart C, Peeters D, Bruneel B, Vancaester E, Vanhee F, Meersman G, Bourgeois P, Vanderdonckt P, Benoit A, Derex L, Mechthouff L, Berhoune N, Ritzenthaler T, Amarenco P, Hobeanu C, Gancedo EM, Calvet D, Ladoux A, Machet A, Lamy C, Mellerio C, Oppenheim C, Rodriguez-Regent C, Bodiguel E, Turc G, Birchenall J, Legrand L, Morin L, Edjali-Goujon M, Naggara O, Raphaelle S, Godon-Hardy S, Domigo V, Guiraud V, Samson Y, Leger A, Rosso C, Baronnet-Chauvet F, Crozier S, Deltour S, Yger M, Sibon I, Renou P, Sagnier S, Zuber M, Tamazyan R, Rodier G, Morel N, Felix S, Vadot W, Wolff V, Aniculaesei A, Yalo B, Bindila D, Quenardelle V, Blanc-Lasserre K, Landrault E, Breynaert L, Cakmak S, Peysson S, Viguier A, Lebely C, Raposo N, Vallet AE, Vallet P, Brugirard S, Cheripelli B, Kalladka D, Moreton F, Dani K, Tawil SE, Ramachandran S, Huang X, Warburton E, Evans N, Perry R, Patel B, Cloud G, Pereira A, Moynihan B, Lovelock C, Choy L, Khan U, Roffe C, Tyrell P, Smith C, Dixit A, Louw S, Broughton D, Shetty A, Appleton J, Sprigg N, Acosta BR, van Eendenburg C, Leal JS, Mar Castellanos Rodrigo MD, Izaga MT, Guillamon OB, Arenillas J, Calleja A, Cortijo E, Mulero P, de la Ossa NP, Garrido A, Martinez A, Esperón CG, Guerrero C, Carrera D, Vilas D, Lopez-cancio E, Palomeras E, Lucente G, Gomis M, Isern I, Becerra JL, Vicente JH, Sánchez J, Dorado L, Grau L, Ispierto L, Prats L, Almendrote M, Hernández M, Jimenez M, Sánchez ML, Torne MM, Presas S, Ustrell X, Pellisé A, Navalpotro I, Luna A, Schonewille W, Nederkoorn P, Majoie C, van den Berg L, van den Berg S, Zonneveld T, Remmers M, Fazekas F, Pichler A, Fandler S, Gattringer T, Mutzenbach J, Weber J, Höfner E, Kohlfürst H, Weinstich K, Kellert L, Bayer-Karpinska A, Opherk C, Wollenweber F, Klein M, Neumann- Haefelin T, Pierskalla A, Harloff A, Bardutzky J, Buggle F, von Schrader J, Kollmar R, Schill J, Löbbe AM, Moulin T, Bouamra B, Bonnet L, Touzé E, Bonnet AL, Touze E, Cogez J, Li L, Guettier S, Kar A, Sivagnanaratham A, Geraghty O, Bojaryn U, Nallasivan A, Gonzales MB, Rodríguez-Yáñez M, Tembl J, Gorriz D, Oberndorfer S, Prohaska E. Quantitative Signal Intensity in Fluid-Attenuated Inversion Recovery and Treatment Effect in the WAKE-UP Trial. Stroke 2020; 51:209-215. [DOI: 10.1161/strokeaha.119.027390] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose—
Relative signal intensity of acute ischemic stroke lesions in fluid-attenuated inversion recovery (fluid-attenuated inversion recovery relative signal intensity [FLAIR-rSI]) magnetic resonance imaging is associated with time elapsed since stroke onset with higher intensities signifying longer time intervals. In the randomized controlled WAKE-UP trial (Efficacy and Safety of MRI-Based Thrombolysis in Wake-Up Stroke Trial), intravenous alteplase was effective in patients with unknown onset stroke selected by visual assessment of diffusion weighted imaging fluid-attenuated inversion recovery mismatch, that is, in those with no marked fluid-attenuated inversion recovery hyperintensity in the region of the acute diffusion weighted imaging lesion. In this post hoc analysis, we investigated whether quantitatively measured FLAIR-rSI modifies treatment effect of intravenous alteplase.
Methods—
FLAIR-rSI of stroke lesions was measured relative to signal intensity in a mirrored region in the contralesional hemisphere. The relationship between FLAIR-rSI and treatment effect on functional outcome assessed by the modified Rankin Scale (mRS) after 90 days was analyzed by binary logistic regression using different end points, that is, favorable outcome defined as mRS score of 0 to 1, independent outcome defined as mRS score of 0 to 2, ordinal analysis of mRS scores (shift analysis). All models were adjusted for National Institutes of Health Stroke Scale at symptom onset and stroke lesion volume.
Results—
FLAIR-rSI was successfully quantified in stroke lesions in 433 patients (86% of 503 patients included in WAKE-UP). Mean FLAIR-rSI was 1.06 (SD, 0.09). Interaction of FLAIR-rSI and treatment effect was not significant for mRS score of 0 to 1 (
P
=0.169) and shift analysis (
P
=0.086) but reached significance for mRS score of 0 to 2 (
P
=0.004). We observed a smooth continuing trend of decreasing treatment effects in relation to clinical end points with increasing FLAIR-rSI.
Conclusions—
In patients in whom no marked parenchymal fluid-attenuated inversion recovery hyperintensity was detected by visual judgement in the WAKE-UP trial, higher FLAIR-rSI of diffusion weighted imaging lesions was associated with decreased treatment effects of intravenous thrombolysis. This parallels the known association of treatment effect and elapsing time of stroke onset.
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Affiliation(s)
- Bastian Cheng
- From the Klinik und Poliklinik für Neurologie, Kopf- und Neurozentrum (B.C., A.N., C.G., G.T.), University Medical Center Hamburg-Eppendorf, Germany
| | - Florent Boutitie
- Service de Biostatistique, Hospices Civils de Lyon, France (F.B.)
- Université Lyon 1, Villeurbanne, France (F.B.)
- CNRS, UMR 5558, Laboratoire de Biométrie et Biologie Evolutive, Equipe Biostatistique-Santé, Villeurbanne, France (F.B.)
| | - Alina Nickel
- From the Klinik und Poliklinik für Neurologie, Kopf- und Neurozentrum (B.C., A.N., C.G., G.T.), University Medical Center Hamburg-Eppendorf, Germany
| | - Anke Wouters
- Department of Neurology, University Hospitals Leuven, Belgium (A.W., R.L.)
- Department of Neurosciences, Experimental Neurology, KU Leuven–University of Leuven, Belgium (A.W., R.L.)
- VIB, Center for Brain and Disease Research, Laboratory of Neurobiology, Campus Gasthuisberg, Leuven, Belgium (A.W., R.L.)
| | - Tae-Hee Cho
- Department of Stroke Medicine, Université Claude Bernard Lyon 1, CREATIS CNRS UMR 5220-INSERM U1206, INSA-Lyon, France (T.-H.C., N.N.)
- Hospices Civils de Lyon, France (T.-H.C., N.N.)
| | - Martin Ebinger
- Centrum für Schlaganfallforschung Berlin, Charité–Universitätsmedizin Berlin, Campus Mitte, Germany (M. Ebinger, M. Endres, J.B.F., I.G.)
- Neurologie der Rehaklinik Medical Park Humboldtmühle, Berlin, Germany (M. Ebinger)
| | - Matthias Endres
- Centrum für Schlaganfallforschung Berlin, Charité–Universitätsmedizin Berlin, Campus Mitte, Germany (M. Ebinger, M. Endres, J.B.F., I.G.)
- Klinik und Hochschulambulanz für Neurologie, Charité–Universitätsmedizin Berlin, Germany (M. Endres)
| | - Jochen B. Fiebach
- Centrum für Schlaganfallforschung Berlin, Charité–Universitätsmedizin Berlin, Campus Mitte, Germany (M. Ebinger, M. Endres, J.B.F., I.G.)
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology (J.F.), University Medical Center Hamburg-Eppendorf, Germany
| | - Ivana Galinovic
- Centrum für Schlaganfallforschung Berlin, Charité–Universitätsmedizin Berlin, Campus Mitte, Germany (M. Ebinger, M. Endres, J.B.F., I.G.)
| | - Josep Puig
- Department of Radiology, Institut de Diagnostic per la Image, Hospital Dr Josep Trueta, Institut d’Investigació Biomèdica de Girona, Parc Hospitalari Martí i Julià de Salt, Girona, Spain (J.P., S.P.)
| | - Vincent Thijs
- Stroke Division, Florey Institute of Neuroscience and Mental Health, University of Melbourne, VIC, Australia (V.T.)
- Austin Health, Department of Neurology, VIC, Australia (V.T.)
| | - Robin Lemmens
- Department of Neurology, University Hospitals Leuven, Belgium (A.W., R.L.)
- Department of Neurosciences, Experimental Neurology, KU Leuven–University of Leuven, Belgium (A.W., R.L.)
- VIB, Center for Brain and Disease Research, Laboratory of Neurobiology, Campus Gasthuisberg, Leuven, Belgium (A.W., R.L.)
| | - Keith W. Muir
- Institute of Neuroscience and Psychology, University of Glasgow, United Kingdom (K.W.M.)
| | - Norbert Nighoghossian
- Department of Stroke Medicine, Université Claude Bernard Lyon 1, CREATIS CNRS UMR 5220-INSERM U1206, INSA-Lyon, France (T.-H.C., N.N.)
- Hospices Civils de Lyon, France (T.-H.C., N.N.)
| | - Salvador Pedraza
- Department of Radiology, Institut de Diagnostic per la Image, Hospital Dr Josep Trueta, Institut d’Investigació Biomèdica de Girona, Parc Hospitalari Martí i Julià de Salt, Girona, Spain (J.P., S.P.)
| | - Claus Z. Simonsen
- Department of Neurology, Aarhus University Hospital, Denmark (C.Z.S.)
| | - Christian Gerloff
- From the Klinik und Poliklinik für Neurologie, Kopf- und Neurozentrum (B.C., A.N., C.G., G.T.), University Medical Center Hamburg-Eppendorf, Germany
| | - Götz Thomalla
- From the Klinik und Poliklinik für Neurologie, Kopf- und Neurozentrum (B.C., A.N., C.G., G.T.), University Medical Center Hamburg-Eppendorf, Germany
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