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Lars Thomassen

Adjunct Professor
Department of Clinical Medicine
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  • E-mailLars.Thomassen@uib.no
  • Visitor Address
    Haukeland Universitetssykehus Laboratoriebygget, 7. etg. Heis øst
  • Postal Address
    Postboks 7804
    5020 Bergen
Academic article
  • Tharaldsen, Ane Roushan; Sand, Kristin Modalsli; Dalen, Ingvild; Wilhelmsen, Gunvor Birkeland; Næss, Halvor; Midelfart, Anna; Rødahl, Eyvind; Thomassen, Lars; Hoff, Jana Midelfart. 2020. Vision-related quality of life in patients with occipital stroke. Acta Neurologica Scandinavica. 509-518.
  • Nawaz, Beenish ; Eide, Geir Egil; Fromm, Annette; Øygarden, Halvor; Sand, Kristin Modalsli; Thomassen, Lars; Næss, Halvor; Waje-Andreassen, Ulrike. 2019. Young ischaemic stroke incidence and demographic characteristics - The Norwegian stroke in the young study - A three-generation research program. European Stroke Journal. 347-354.
  • Næss, Halvor; Logallo, Nicola; Waje-Andreassen, Ulrike; Thomassen, Lars; Kvistad, Christopher Elnan. 2019. U-shaped relationship between hemoglobin level and severity of ischemic stroke. Acta Neurologica Scandinavica. 56-61.
  • Rønning, Ole M.; Logallo, Nicola; Thommessen, Bente; Tobro, Håkon; Novotny, Vojtech; Kvistad, Christopher Elnan; Aamodt, Anne Hege; Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars. 2019. Tenecteplase versus alteplase between 3 and 4.5 hours in low national institutes of health stroke scale. Stroke. 498-500.
  • Novotny, Vojtech; Khanevski, Andrej; Bjerkreim, Anna Therese; Kvistad, Christopher Elnan; Fromm, Annette; Waje-Andreassen, Ulrike; Næss, Halvor; Thomassen, Lars; Logallo, Nicola. 2019. Short-term outcome and in-hospital complications after acute cerebral infarcts in multiple arterial territories. Stroke. 3625-3627.
  • Kvistad, Christopher Elnan; Novotny, Vojtech; Kurz, Martin; Rønning, Ole M.; Thommessen, Bente; Carlsson, Maria; Waje-Andreassen, Ulrike; Næss, Halvor; Thomassen, Lars; Logallo, Nicola. 2019. Safety and Outcomes of Tenecteplase in Moderate and Severe Ischemic Stroke. Stroke. 1279-1281.
  • Khanevski, Andrej; Bjerkreim, Anna Therese; Novotny, Vojtech; Næss, Halvor; Thomassen, Lars; Logallo, Nicola; Kvistad, Christopher Elnan. 2019. Recurrent ischemic stroke: Incidence, predictors, and impact on mortality. Acta Neurologica Scandinavica. 3-8.
  • Aarli, Sander Johan; Novotny, Vojtech; Thomassen, Lars; Kvistad, Christopher Elnan; Logallo, Nicola; Fromm, Annette. 2019. Persistent microembolic signals in the cerebral circulation on transcranial Doppler after intravenous sulfur hexafluoride microbubble infusion. Journal of Neuroimaging. 1-4.
  • Bjerkreim, Anna Therese; Næss, Halvor; Khanevski, Andrej; Thomassen, Lars; Waje-Andreassen, Ulrike; Logallo, Nicola. 2019. One-year versus five-year hospital readmission after ischemic stroke and TIA. BMC Neurology. 1-8.
  • Khanevski, Andrej; Kvistad, Christopher Elnan; Novotny, Vojtech; Næss, Halvor; Thomassen, Lars; Logallo, Nicola; Bjerkreim, Anna Therese. 2019. Incidence and etiologies of stroke mimics after incident stroke or transient ischemic attack. Stroke. 2937-2940.
  • Bøthun, Marianne Lundervik; Haaland, Øystein Ariansen; Moen, Gunnar; Logallo, Nicola; Svendsen, Frode; Thomassen, Lars; Helland, Christian Andre. 2019. Impaired cerebrovascular reactivity may predict delayed cerebral ischemia after aneurysmal subarachnoid hemorrhage. Journal of the Neurological Sciences. 1-10.
  • Bjerkreim, Anna Therese; Khanevski, Andrej; Thomassen, Lars; Selvik, Henriette Aurora; Waje-Andreassen, Ulrike; Næss, Halvor; Logallo, Nicola. 2019. Five-year readmission and mortality differ by ischemic stroke subtype. Journal of the Neurological Sciences. 31-37.
  • Selvik, Henriette Aurora; Bjerkreim, Anna Therese; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor; Kvistad, Christopher Elnan. 2018. When to screen ischaemic stroke patients for cancer. Cerebrovascular Diseases. 42-47.
  • sand, kristin modalsli; Naess, Halvor; Thomassen, Lars; Hoff, Jana Midelfart. 2018. Visual field defect after ischemic stroke - impact on mortality. Acta Neurologica Scandinavica. 293-298.
  • Sand, Kristin Modalsli; Næss, Halvor; Thomassen, Lars; Hoff, Jana Midelfart. 2018. Visual field defect after ischemic stroke - impact on mortality. Acta Neurologica Scandinavica. 293-298.
  • Bøthun, Marianne Lundervik; Haaland, Øystein Ariansen; Logallo, Nicola; Svendsen, Frode; Thomassen, Lars; Helland, Christian Andre. 2018. Time course of cerebrovascular reactivity in patients treated for unruptured intracranial aneurysms: A one-year transcranial Doppler and acetazolamide follow-up study. BioMed Research International. 1-9.
  • Khanevski, Andrej; Bjerkreim, Anna Therese; Novotny, Vojtech; Næss, Halvor; Thomassen, Lars; Logallo, Nicola; Kvistad, Christopher Elnan. 2018. Thirty-day recurrence after ischemic stroke or TIA. Brain and Behavior. 1-6.
  • Bjerkreim, Anna Therese; Khanevski, Andrej; Glad, Solveig B; Thomassen, Lars; Næss, Halvor; Logallo, Nicola. 2018. Thirty-day readmission after spontaneous intracerebral hemorrhage. Brain and Behavior. 1-4.
  • Bjerkreim, Anna Therese; Khanevski, Andrej; Selvik, Henriette Aurora; Waje-Andreassen, Ulrike; Thomassen, Lars; Næss, Halvor; Logallo, Nicola. 2018. The impact of ischaemic stroke subtype on 30-day hospital readmissions. Stroke Research and Treatment. 7 pages.
  • Kvistad, Christopher Elnan; Novotny, Vojtech; Næss, Halvor; Hagberg, Guri; Ihle-Hansen, Hege; Waje-Andreassen, Ulrike; Thomassen, Lars; Logallo, Nicola. 2018. Safety and predictors of stroke mimics in The Norwegian Tenecteplase Stroke Trial (NOR-TEST). International Journal of Stroke. 1-9.
  • Nzwalo, Hipólito; Nogueira, Jerina; Guilherme, Patrícia; Abreu, Pedro; Félix, Catarina; Ferreira, Fátima; Ramalhete, Sara; Marreiros, Ana; Tatlisumak, Turgut; Thomassen, Lars; Logallo, Nicola. 2018. Hospital readmissions after spontaneous intracerebral hemorrhage in Southern Portugal. Clinical neurology and neurosurgery (Dutch-Flemish ed. Print). 144-148.
  • Næss, Halvor; Thomassen, Lars; Waje-Andreassen, Ulrike; Glad, Solveig B; Kvistad, Christopher Elnan. 2018. High risk of early neurological worsening of lacunar infarction. Acta Neurologica Scandinavica. 1-7.
  • Logallo, Nicola; Novotny, Vojtech; Assmus, Jörg; Kvistad, Christopher Elnan; Alteheld, Lars Holger; Rønning, Ole M.; Thommessen, Bente; Amthor, Karl-Friedrich; Ihle-Hansen, Hege; Kurz, Martin; Tobro, Håkon; Kaur, Kamaljit; Stankiewicz, Magdalena; Carlsson, Maria; Morsund, Åse Hagen; Idicula, Titto; Aamodt, Anne Hege; Lund, Christian; Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars. 2017. Tenecteplase versus alteplase for management of acute ischaemic stroke (NOR-TEST): a phase 3, randomised, open-label, blinded endpoint trial. Lancet Neurology. 781-788.
  • Nzwalo, Hipólito; Nogueira, Jerina; Félix, Ana; Guilherme, Patricia; Abreu, Pedro; Figueiredo, Teresa; Ferreira, Fátima; Marreiros, Ana; Thomassen, Lars; Logallo, Nicola. 2017. Short-term outcome of spontaneous intracerebral hemorrhage in Algarve, Portugal: retrospective hospital-based study. Journal of Stroke & Cerebrovascular Diseases. 346-351.
  • Søndergaard, Lars; Kasner, Scott E.; Rhodes, John F.; Andersen, Grethe; Iversen, Helle K.; Nielsen-Kudsk, Jens E.; Settergren, Magnus; Sjöstrand, Christina; Roine, Risto O.; Hildick-Smith, David; Spence, J. David; Thomassen, Lars. 2017. Patent foramen ovale closure or antiplatelet therapy for cryptogenic stroke. New England Journal of Medicine. 1033-1042.
  • Khanevski, Andrej; Næss, Halvor; Thomassen, Lars; Waje-Andreassen, Ulrike; Nacu, Aliona; Kvistad, Christopher Elnan. 2017. Elevated body temperature in ischemic stroke associated with neurological improvement. Acta Neurologica Scandinavica. 414-418.
  • Kvistad, Christopher Elnan; Nacu, Aliona; Novotny, Vojtech; Logallo, Nicola; Waje-Andreassen, Ulrike; Næss, Halvor; Thomassen, Lars. 2017. Contrast‐enhanced sonothrombolysis in acute ischemic stroke patients without intracranial large‐vessel occlusion. Acta Neurologica Scandinavica. 256-261.
  • Novotny, Vojtech; Nacu, Aliona; Kvistad, Christopher Elnan; Fromm, Annette; Neckelmann, Gesche F; Khanevski, Andrej; Tobro, Håkon; Waje-Andreassen, Ulrike; Næss, Halvor; Thomassen, Lars; Logallo, Nicola. 2017. Clinical importance of temporal bone features for the efficacy of contrast-enhanced sonothrombolysis: a retrospective analysis of the NOR-SASS Trial. Translational Stroke Research. 1-7.
  • Novotny, Vojtech; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2017. Acute cerebral infarcts in multiple arterial territories associated with cardioembolism. Acta Neurologica Scandinavica. 346-351.
  • Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars; Kvistad, Christopher Elnan. 2017. A score for paroxysmal atrial fibrillation in acute ischemic stroke. International Journal of Stroke. 496-502.
  • Sand, Kristin Modalsli; Wilhelmsen, Gunvor B.; Næss, Halvor; Midelfart, Anna; Thomassen, Lars; Hoff, Jana Midelfart. 2016. Vision problems in ischaemic stroke patients: effects on life quality and disability. European Journal of Neurology. 1-7.
  • Bringeland, Gerd Haga; Nacu, Aliona; Waje-Andreassen, Ulrike; Thomassen, Lars; Næss, Halvor. 2016. U-curve relation between cholesterol and prior ischemic stroke. Brain and Behavior.
  • Novotny, Vojtech; Khanevski, Andrej; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2016. Time patterns in multiple acute cerebral infarcts. International Journal of Stroke.
  • Næss, Halvor; Kurz, Friedrich Martin W.; Thomassen, Lars; Waje-Andreassen, Ulrike. 2016. Serial NIHSS scores in patients with acute cerebral infarction. Acta Neurologica Scandinavica. 415-420.
  • Mørch-Rasmussen, Anja Cathrin; Nacu, Aliona; Waje-Andreassen, Ulrike; Thomassen, Lars; Næss, Halvor. 2016. Recurrent ischemic stroke is associated with the burden of risk factors. Acta Neurologica Scandinavica. 289-294.
  • Nacu, Aliona; Kvistad, Christopher Elnan; Næss, Halvor; Øygarden, Halvor; Logallo, Nicola; Assmus, Jörg; Waje-Andreassen, Ulrike; Kurz, Kathinka Dæhli; Neckelmann, Gesche F; Thomassen, Lars. 2016. NOR-SASS (Norwegian Sonothrombolysis in Acute Stroke Study): Randomized controlled contrast-enhanced sonothrombolysis in an unselected acute ischemic stroke population. Stroke. 335-341.
  • Sand, Kristin Modalsli; Næss, Halvor; Nilsen, Roy Miodini; Thomassen, Lars; Hoff, Jana Midelfart. 2016. Less thrombolysis in posterior circulation infarction—a necessary evil? Acta Neurologica Scandinavica. 546-552.
  • Bjerkreim, Anna Therese; Thomassen, Lars; Waje-Andreassen, Ulrike; Selvik, Henriette Aurora; Næss, Halvor. 2016. Hospital Readmission after Intracerebral Hemorrhage. Journal of Stroke & Cerebrovascular Diseases. 157-162.
  • Nacu, Aliona; Bringeland, Gerd Haga; Khanevski, Andrej; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2016. Early neurological worsening in acute ischaemic stroke patients. Acta Neurologica Scandinavica. 25-29.
  • Bøthun, Marianne Lundervik; Haaland, Øystein Ariansen; Logallo, Nicola; Svendsen, Frode; Thomassen, Lars; Helland, Christian Andre. 2016. Cerebrovascular reactivity after treatment of unruptured intracranial aneurysms - a transcranial Doppler sonography and acetazolamide study. Journal of the Neurological Sciences. 97-103.
  • Øygarden, Halvor; Fromm, Annette; Sand, Kristin Modalsli; Eide, Geir Egil; Thomassen, Lars; Næss, Halvor; Waje-Andreassen, Ulrike. 2016. Can the cardiovascular family history reported by our patients be trusted? The Norwegian Stroke in the Young Study. European Journal of Neurology. 154-159.
  • Fromm, Annette; Haaland, Øystein Ariansen; Næss, Halvor; Thomassen, Lars; Waje-Andreassen, Ulrike. 2016. Atherosclerosis in trial of org 10172 in acute stroke treatment subtypes among young and middle-aged stroke patients: The Norwegian stroke in the young study. Journal of Stroke & Cerebrovascular Diseases. 825-830.
  • Nacu, Aliona; Fromm, Annette; Sand, Kristin Modalsli; Waje-Andreassen, Ulrike; Thomassen, Lars; Næss, Halvor. 2016. Age dependency of ischaemic stroke subtypes and vascular risk factors in western Norway: The Bergen Norwegian Stroke Cooperation Study. Acta Neurologica Scandinavica. 202-207.
  • Kvistad, Christopher Elnan; Øygarden, Halvor; Logallo, Nicola; Thomassen, Lars; Waje-Andreassen, Ulrike; Moen, Gunnar; Næss, Halvor. 2016. A stress-related explanation to the increased blood pressure and its course following ischemic stroke. Vascular Health and Risk Management. 435-442.
  • Logallo, Nicola; Kvistad, Christopher Elnan; Thomassen, Lars. 2015. Therapeutic Potential of Tenecteplase in the Management of Acute Ischemic Stroke. CNS Drugs. 811-818.
  • Øygarden, Halvor; Fromm, Annette; Sand, Kristin Modalsli; Eide, Geir Egil; Thomassen, Lars; Næss, Halvor; Waje-Andreassen, Ulrike. 2015. Stroke patients' knowledge about cardiovascular family history - the Norwegian Stroke in the Young Study (NOR-SYS). BMC Neurology. 1-8.
  • Logallo, Nicola; Bøthun, Marianne Lundervik; Guttormsen, Anne Berit; Holmaas, Gunhild; Kråkenes, Jostein; Thomassen, Lars; Svendsen, Frode; Helland, Christian Andre. 2015. Continuous Local Intra-Arterial Nimodipine for the Treatment of Cerebral Vasospasm. Journal of Neurological Surgery Reports. e75-78.
  • Helvig, Eirik; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2015. Comparing withdrawal and non-withdrawal of life-sustaining treatment among patients who died from stroke. Vascular Health and Risk Management. 507-510.
  • Bjerkreim, Anna Therese; Thomassen, Lars; Brøgger, Jan C; Waje-Andreassen, Ulrike; Næss, Halvor. 2015. Causes and Predictors for Hospital Readmission after Ischemic Stroke. Journal of Stroke & Cerebrovascular Diseases. 2095-2101.
  • Selvik, Henriette Aurora; Thomassen, Lars; Bjerkreim, Anna Therese; Næss, Halvor. 2015. Cancer-Associated Stroke: The Bergen NORSTROKE Study. Cerebrovascular Diseases. 107-113.
  • Nacu, Aliona; Kvistad, Christopher Elnan; Logallo, Nicola; Næss, Halvor; Waje-Andreassen, Ulrike; Aamodt, Anne Hege; Solhoff, Ragnar Håkon; Lund, Christian; Tobro, Håkon; Rønning, Ole M.; Salvesen, Rolf; Idicula, Titto; Thomassen, Lars. 2015. A pragmatic approach to sonothrombolysis in acute ischaemic stroke: The Norwegian randomised controlled sonothrombolysis in acute stroke study (NOR-SASS). BMC Neurology. 12 pages.
  • Logallo, Nicola; Kvistad, Christopher Elnan; Nacu, Aliona; Næss, Halvor; Waje-Andreassen, Ulrike; Assmus, Jørg; Aamodt, Anne Hege ; Lund, Christian; Kurz, Friedrich Martin W.; Rønning, Ole M.; Salvesen, Rolf; Idicula, Titto; Thomassen, Lars. 2014. The Norwegian tenecteplase stroke trial (NOR-TEST): Randomised controlled trial of tenecteplase vs. alteplase in acute ischaemic stroke. BMC Neurology.
  • Selvik, Henriette Aurora; Thomassen, Lars; Logallo, Nicola; Næss, Halvor. 2014. Prior cancer in patients with ischemic stroke: The Bergen NORSTROKE Study. Journal of Stroke & Cerebrovascular Diseases. 919-925.
  • Logallo, Nicola; Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars. 2014. Prevalence of intracranial stenosis in a Norwegian ischemic stroke population. Journal of Stroke & Cerebrovascular Diseases. 1611-1615.
  • Logallo, Nicola; Kvistad, Christopher Elnan; Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars. 2014. Mild stroke: Safety and outcome in patients receiving thrombolysis. Acta Neurologica Scandinavica. 37-40.
  • Kvistad, Christopher Elnan; Øygarden, Halvor; Logallo, Nicola; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2014. Is smoking associated with favourable outcome in tPA‐treated stroke patients? Acta Neurologica Scandinavica. 299-304.
  • Kvistad, Christopher Elnan; Khanevski, Andrej; Nacu, Aliona; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2014. Is higher body temperature beneficial in ischemic stroke patients with normal admission CT angiography of the cerebral arteries? Vascular Health and Risk Management. 49-54.
  • Logallo, Nicola; Fromm, Annette; Waje-Andreassen, Ulrike; Thomassen, Lars; Matre, Knut. 2014. Effect of microbubble contrast on intracranial blood flow velocity assessed by transcranial Doppler. Journal of Ultrasound. 21-26.
  • Kvistad, Christopher Elnan; Logallo, Nicola; Thomassen, Lars; Moen, Gunnar; Waje-Andreassen, Ulrike; Næss, Halvor. 2014. Diffusion-weighted lesions in stroke patients with transient symptoms - Where are they located? Cerebrovascular Diseases. 219-225.
  • Øygarden, Halvor; Kvistad, Christopher Elnan; Bjørk, Marte Helene; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2014. Diffusion-weighted lesions in acute ischaemic stroke patients with migraine. Acta Neurologica Scandinavica. 41-46.
  • Bøthun, Marianne Lundervik; Fromm, Annette; Haaland, Øystein; Waje-Andreassen, Ulrike; Svendsen, Frode; Thomassen, Lars; Helland, Christian Andre. 2014. Carotid intima-media thickness - a potential predictor for rupture risk of intracranial aneurysms. International Journal of Stroke. 866-872.
  • Kvistad, Christopher Elnan; Thomassen, Lars; Waje-Andreassen, Ulrike; Logallo, Nicola; Næss, Halvor. 2014. Body temperature and major neurological improvement in tPA-treated stroke patients. Acta Neurologica Scandinavica. 325-329.
  • Sørensen, Tove; Dyb, Kari; Rygh, Ellen; Salvesen, Rolf; Thomassen, Lars. 2014. A qualitative description of telemedicine for acute stroke care in Norway: technology is not the issue. BMC Health Services Research.
  • Kvistad, Christopher Elnan; Øygarden, Halvor; Logallo, Nicola; Moen, Gunnar; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2014. A dark Side of subcortical diffusion-weighted lesions? Characteristics, cause, and outcome in large subcortical infarction: The Bergen Norwegian Stroke Cooperation Study. Stroke. 2710-2716.
  • Sand, Kristin Modalsli; Midelfart, Anna; Thomassen, Lars; Melms, Arthur; Wilhelm, Helmut; Hoff, Jana Midelfart. 2013. Visual impairment in stroke patients - a review. Acta Neurologica Scandinavica. 52-56.
  • Fromm, Annette; Thomassen, Lars; Næss, Halvor; Meijer, Rudy; Eide, Geir Egil; Kråkenes, Jostein; Vedeler, Christian A.; Gerdts, Eva; Larsen, Terje H; Kuiper, Karel Kier-Jan; Laxdal, Elin Hanna; Russell, David; Tatlisumak, Turgut; Waje-Andreassen, Ulrike. 2013. The Norwegian stroke in the young study (NOR-SYS): rationale and design. BMC Neurology. 12 pages.
  • Henriksen, Endre; Ljøstad, Unn; Tveiten, Arnstein; Næss, Halvor; Thomassen, Lars; Mygland, Åse. 2013. TPA for ischemic stroke in patients ≥80 years. Acta Neurologica Scandinavica. 309-315.
  • Kvistad, Christopher Elnan; Logallo, Nicola; Thomassen, Lars; Waje-Andreassen, Ulrike; Brøgger, Jan C; Næss, Halvor. 2013. Safety of off-label stroke treatment with tissue plasminogen activator. Acta Neurologica Scandinavica. 48-53.
  • Kvistad, Christopher Elnan; Øygarden, Halvor; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2013. Persistent middle cerebral artery occlusion associated with lower body temperature on admission. Vascular Health and Risk Management. 297-302.
  • Waje-Andreassen, Ulrike; Thomassen, Lars; Jusufovic, Mirza; Power, Kjersti; Eide, Geir Egil; Vedeler, Christian A.; Næss, Halvor. 2013. Ischaemic stroke at a young age is a serious event final results of a population-based long-term follow-up in Western Norway. European Journal of Neurology. 818-823.
  • Ringelstein, E. Bernd; Chamorro, Angel; Kaste, Markku; Langhorne, Peter; Leys, Didier; Lyrer, Phillippe; Thijs, Vincent; Thomassen, Lars; Toni, Danilo. 2013. European Stroke Organisation Recommendations to Establish a Stroke Unit and Stroke Center. Stroke. 828-840.
  • Barlas, Nilüfer Yeşilot; Putaala, Jukka; Waje-Andreassen, Ulrike; Vassilopoulou, Sofia; Nardi, Katiuscia; Odier, Celine; Hofgart, Gergely; Engelter, Stefan; Burow, Annika; Mihalka, Laszlo; Kloss, Manja; Ferrari, Julia; Lemmens, Robin; Coban, Oguzhan; Haapaniemi, Elena; Maaijwee, Noortje; Rutten-Jacobs, Loes; Bersano, Anna; Cereda, Carlo; Baron, Pierluigi; Borellini, Linda; Valcarenghi, Caterina; Thomassen, Lars; Grau, Armin J.; Palm, Frederick; Urbanek, Christian; Tuncay, Rezzan; Durukan Tolvanen, Aysan; van Dijk, Ewoud J.; de Leeuw, Frank-Erik; Thijs, Vincent; Greisenegger, Stefan; Vemmos, Konstantinos; Lichy, Christoph; Bereczki, Daniel; Csiba, Laszlo; Michel, Patrik; Leys, Didier; Spengos, Konstantinos; Næss, Halvor; Tatlisumak, Turgut; Bahar, Sara Zarko. 2013. Etiology of first-ever ischaemic stroke in European young adults: the 15 cities young stroke study. European Journal of Neurology. 1431-1439.
  • Kvistad, Christopher Elnan; Logallo, Nicola; Øygarden, Halvor; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2013. Elevated Admission Blood Pressure and Stroke Severity in Acute Ischemic Stroke: The Bergen NORSTROKE Study. Cerebrovascular Diseases. 351-354.
  • Øygarden, Halvor; Kvistad, Christopher Elnan; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2013. Does a history of migraine affect the rate of thrombolysis in young stroke patients? Stroke Research and Treatment. 5 pages.
  • Kvistad, Christopher Elnan; Thomassen, Lars; Waje-Andreassen, Ulrike; Moen, Gunnar; Logallo, Nicola; Næss, Halvor. 2013. Clinical implications of increased use of MRI in TIA. Acta Neurologica Scandinavica. 32-38.
  • Fromm, Annette; Lundervold, Astri ; Moen, Gunnar; SKULSTAD, SIRI; Thomassen, Lars. 2013. A vascular approach to mild amnestic cognitive impairment: a pilot study. Acta Neurologica Scandinavica, Supplementum. 73-76.
  • Aamodt, Anne Hege ; Thomassen, Lars; Hoff, Jana Midelfart; Midelfart, Anna; Bråthen, Geir. 2012. Non-arteritisk sentralarterieokklusjon (CRAO). Oftalmolog. 14-17.
  • Logallo, Nicola; Lind, Jonas Anders; Næss, Halvor; Idicula, Titto; Brøgger, Jan C; Waje-Andreassen, Ulrike; Thomassen, Lars. 2012. Middle cerebral artery stenosis: transcranial color-coded sonography based on continuity equation versus CT-angiography. Ultraschall in der Medizin. E326-332.
  • Tveiten, Arnstein; Ljøstad, Unn; Mygland, Åse; Thomassen, Lars; Pripp, Are Hugo; Næss, Halvor. 2012. Intracerebral hemorrhage in Southern Norway - a Hospital-based incidence study. European Neurology. 240-245.
  • Thomassen, Lars; Waje-Andreassen, Ulrike; Brøgger, Jan C; Næss, Halvor. 2012. Acute stroke centre - the changing focus of stroke unit care. The Bergen NORSTROKE Study. Acta Neurologica Scandinavica. 410-415.
  • Logallo, Nicola; Næss, Halvor; Idicula, Titto; Brøgger, Jan C; Waje-Andreassen, Ulrike; Thomassen, Lars. 2011. Serum uri acid: neuroprotection in thrombolysis. The Bergen NORSTROKE study. BMC Neurology. 6 pages.
  • Næss, Halvor; Idicula, Titto; Brøgger, Jan C; Waje-Andreassen, Ulrike; Thomassen, Lars. 2011. High Proportion of Lacunar Strokes at Night: The Bergen Stroke Study. Journal of Stroke & Cerebrovascular Diseases. 424-428.
  • Thomassen, Lars; Storstein, Anette; Jusufovic, Mirza; Rotevatn, Svein; Lehmann, Sverre; Waje-Andreassen, Ulrike. 2011. En kvinne med tilbakevendende arteriovenøse tromboser. Tidsskrift for Den norske legeforening. 1303-1306.
  • Næss, Halvor; Fromm, Annette; Iversen, Ole-Erik; Thomassen, Lars; Waje-Andreassen, Ulrike. 2011. Decline of arterial cerebral infarction among young women: the Bergen Stroke Study. Vascular Health and Risk Management. 81-84.
  • Fromm, Annette; Waje-Andreassen, Ulrike; Thomassen, Lars; Næss, Halvor. 2011. Comparison between Ischemic Stroke Patients <50 Years and ≥50 Years Admitted to a Single Centre: The Bergen Stroke Study. Stroke Research and Treatment. 8 pages.
  • Bjørk, Marte Helene; Thomassen, Lars; Waje-Andreassen, Ulrike. 2011. Cerebral arterial vasospasm. . Tidsskrift for Den norske legeforening. 1558.
  • Varga, Viktoria; Waje-Andreassen, Ulrike; Næss, Halvor; Lundstadsveen, Maria Therese; Thomassen, Lars. 2009. Trombolytisk behandling ved hjerneinfarkt. Tidsskrift for Den norske legeforening. 2214-2217.
  • Waje-Andreassen, Ulrike; Thomassen, Lars; Aarli, Ånen; Kråkenes, Jostein; Norgård, Gunnar; Russell, David. 2009. Trombolytisk behandling ved arterielt hjerneinfarkt hos barn. Tidsskrift for Den norske legeforening. 2219-2222.
  • Idicula, Titto; Waje-Andreassen, Ulrike; Brøgger, Jan; Næss, Halvor; Thomassen, Lars. 2009. Serum Albumin in Ischemic Stroke Patients: The Higher the Better. Cerebrovascular Diseases. 13-17.
  • Næss, Halvor; Brøgger, Jan; Waje-Andreassen, Ulrike; Idicula, Titto; Thomassen, Lars. 2009. Preadmission use of warfarin improves short-term outcome in patients with acute cerebral infarction. Cerebrovascular Diseases. 8-12.
  • Tveiten, Arnstein; Mygland, Åse; Ljøstad, Unn; Thomassen, Lars. 2009. Intravenous thrombolysis for ischaemic stroke: short delays and high community-based treatment rates after organisational changes in a previously inexperienced centre. Emergency Medicine Journal. 324-326.
  • Kharitonova, Tatiana; Thoren, Margareta Molin; Ahmed, Niaz; Wardlaw, Joanna M.; von Kummer, Rüdiger; Thomassen, Lars; Wahlgren, Nils. 2009. Disappearing hyperdense middle cerebral artery sign in ischaemic stroke patients treated with intravenous thrombolysis: clinical course and prognostic significance. Journal of Neurology, Neurosurgery and Psychiatry. 273-278.
  • Næss, Halvor; Brøgger, Jan C; Idicula, Titto; Waje-Andreassen, Ulrike; Moen, Gunnar; Thomassen, Lars. 2009. Clinical presentation and diffusion weighted MRI of acute cerebral infarction. The Bergen Stroke Study. BMC Neurology. 5 pages.
  • Idicula, Titto; Thomassen, Lars. 2009. Case Report of a Patient Who Underwent Thrombolysis of a "Silent" Thrombus in the Middle Cerebral Artery. The Neurologist. 142-143.
  • Idicula, Titto; Brøgger, Jan; Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars. 2009. Admission C - reactive protein after acute ischemic stroke is associated with stroke severity and mortality: The 'Bergen stroke study'. BMC Neurology. 9 pages.
  • Haugen, Olav H.; Sletteberg, Odd; Thomassen, Lars; Kråkenes, Jostein. 1990. Bilateral non-traumatic carotid cavernous sinus fistula with spontaneous closure. Acta Ophthalmologica. 743-747.
Academic lecture
  • Novotny, Vojtech; Nacu, Aliona; Neckelmann, Gesche F; Andrej N, Khanevski; Tobro, Håkon; Kvistad, Christopher Elnan; Logallo, Nicola; Fromm, Annette; Waje-Andreassen, Ulrike; Næss, Halvor; Thomassen, Lars. 2017. THE FEATURES OF THE TEMPORAL BONE WINDOW AND THEIR IMPLICATIONS FOR CONTRAST-ENHANCED SONOTHROMBOLYSIS IN ACUTE ISCHEMIC STROKE.
Reader opinion piece
  • Kvistad, Christopher Elnan; Thomassen, Lars; Aamodt, Anne Hege; Logallo, Nicola. 2018. Tenecteplase ved akutt hjerneinfarkt. Tidsskrift for Den norske legeforening. 22-23.
  • Fromm, Annette; Thomassen, Lars. 2015. Store blodpropper i hjernen bør fjernes med trombektomi. Tidsskrift for Den norske legeforening. 2139-2140.
  • Thomassen, Lars; Næss, Halvor; Waje-Andreassen, Ulrike. 2015. Re: Hva er god behandling ved akutt hjerneslag? Tidsskrift for Den norske legeforening. 1010-1011.
  • Kvistad, Christopher Elnan; Thomassen, Lars; Moen, Gunnar; Næss, Halvor. 2015. Diffusjonsvektet MR ved transitorisk iskemisk anfall. Tidsskrift for Den norske legeforening. 835-836.
  • Kvistad, Christopher Elnan; Thomassen, Lars. 2015. C.E. Kvistad & L. Thomassen svarer. Tidsskrift for Den norske legeforening. 1106-1106.
  • Henriksen, Endre; Ljøstad, Unn; Tveiten, Arnstein; Næss, Halvor; Thomassen, Lars; Mygland, Åse. 2013. Response to letter to the editor; ANE-O-03-12-096. Acta Neurologica Scandinavica. e19-e19.
  • Bjørk, Marte Helene; Thomassen, Lars; Waje-Andreassen, Ulrike. 2011. Brev til redaktørenMarte-Helene Bjørk og medarbeidere svarer:. Tidsskrift for Den norske legeforening. 2334.
Short communication
  • Nzwalo, Hipólito; Félix, Catarina; Nogueira, Jerina; Guilherme, Patrícia; Ferreira, Fátima; Salero, Teresa; Ramalhete, Sara; Martinez, Joana; Mouzinho, Maria; Marreiros, Ana; Thomassen, Lars; Logallo, Nicola. 2018. Predictors of long-term survival after spontaneous intracerebral hemorrhage in southern Portugal: A retrospective study of a community representative population. Journal of the Neurological Sciences. 122-126.
  • Nzwalo, Hipólito; Nogueira, Jerina; Félix, Catarina; Guilherme, Patricia; Baptista, Alexandre; Figueiredo, Teresa; Ferreira, Fátima; Marreiros, Ana; Thomassen, Lars; Logallo, Nicola. 2017. Incidence and case-fatality from spontaneous intracerebral hemorrhage in a southern region of Portugal. Journal of the Neurological Sciences. 74-78.
Doctoral dissertation
  • Nacu, Aliona. 2017. The Norwegian Sonothrombolysis in Acute Stroke Study (NOR-SASS). Randomised controlled contrast-enhanced sonothrombolysis in a general acute ischaemic stroke population.
  • Haász, Judit. 2015. Structural and Functional Brain Imaging and Cognition in Aging and Stroke.
  • Thomassen, Lars. 2005. Acute Stroke – The first six hours.
Abstract
  • Nacu, Aliona; Kvistad, Christopher Elnan; Waje-Andreassen, Ulrike; Næss, Halvor; Thomassen, Lars. 2013. The Norwegian Sonothrombolysis in Acute Stroke study NOR-SASS. Cerebrovascular Diseases. 64-64.
  • Idicula, Titto; Logallo, Nicola; Brøgger, Jan C; Næss, Halvor; Thomassen, Lars. 2012. Statins after stroke: how good are we with secondary prevention? European Journal of Neurology. 65-65.
  • Kvistad, Christopher Elnan; Thomassen, Lars; Waje-Andreassen, Ulrike; Næss, Halvor. 2012. Severe ischemic stroke associated with low body temperature within 6 hours of onset. The Bergen NORSTROKE study. European Journal of Neurology. 27-27.
  • Logallo, Nicola; Næss, Halvor; Waje-Andreassen, Ulrike; Thomassen, Lars. 2012. Intracranial atherosclerosis in Norway. Preliminary results from the Norwegian intracranial atherosclerosis study. European Journal of Neurology. 51-51.
  • Fromm, Annette; Thomassen, Lars; Næss, Halvor; Waje-Andreassen, Ulrike. 2012. Generalized atherosclerotic disease among young ischemic stroke patients. Assessment by the NOR-SYS research protocol. The NORwegian Stroke in the Young study. European Journal of Neurology. 490-490.
  • Idicula, Titto; Waje-Andreassen, Ulrike; Brøgger, Jan; Næss, Halvor; Thomassen, Lars. 2009. A prospective study of serum albumin in ischemic stroke patients; albumin is likely to be neuroprotective. European Journal of Neurology. 39-39.
Poster
  • Nacu, Aliona; Kvistad, Christopher Elnan; Logallo, Nicola; Næss, Halvor; Waje-Andersen, U.; Thomassen, Lars. 2014. The Norwegian Sonothrombolysis in Acute Stroke Study (NORSASS): A randomised controlled trial of contrast enhanced ultrasound treatment in acute ischaemic stroke .
  • Haász, Judit; Lundervold, Arvid; Espeseth, Thomas; Thomassen, Lars; Specht, Karsten. 2014. Longitudinal changes in visual working memory performance and frontoparietal intrinsic connectivity network synchronization non-cortical stroke.
Academic literature review
  • Logallo, Nicola; Kvistad, Christopher Elnan; Nacu, Aliona; Thomassen, Lars. 2016. Novel thrombolytics for acute ischemic stroke: Challenges and opportunities. 101-108.
  • Øygarden, Halvor; Fromm, Annette; Sand, Kristin Modalsli; Kvistad, Christopher Elnan; Eide, Geir Egil; Thomassen, Lars; Næss, Halvor; Waje-Andreassen, Ulrike. 2016. A family history of stroke is associated with increased intima-media thickness in young ischemic Stroke - The norwegian stroke in the young study (NOR-SYS).
  • Jusufovic, Mirza; Thomassen, Lars; Skjelland, Mona. 2014. Hjerneinfarkt ved åpent foramen ovale. 180-184.

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