Blar i forfatter "Johnsen, Liv-Hege"

Viser treff 1-6 av 6

    • Anatomical variations in the circle of Willis are associated with increased odds of intracranial aneurysms: The Tromsø study 

      Hindenes, Lars Bakke; Ingebrigtsen, Tor; Isaksen, Jørgen Gjernes; Håberg, Asta; Johnsen, Liv-Hege; Herder, Marit; Mathiesen, Ellisiv B.; Vangberg, Torgil Riise (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-25)
      Purpose: Studies on patients suggest an association between anatomical variations in the Circle of Willis (CoW) and intracranial aneurysms (IA), but it is unclear whether this association is present in the general population. In this cross-sectional population study, we investigated the associations between CoW anatomical variations and IA.<p> <p>Methods: We included 1667 participants from a ...

    • Cerebral aneurysm morphology before and after rupture: nation-wide case series of 29 aneurysms 

      Skodvin, Torbjørn Øygard; Johnsen, Liv-Hege; Gjertsen, Øivind; Isaksen, Jørgen Gjernes; Sorteberg, Angelika (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-06)
      <p><i>Background and Purpose</i>: Using postrupture morphology to predict rupture risk of an intracranial aneurysm may be inaccurate because of possible morphological changes at or around the time of rupture. The present study aims at comparing morphology from angiograms obtained prior to and just after rupture and to evaluate whether postrupture morphology is an adequate surrogate for rupture ...

    • Endovaskulær behandling av abdominale aortaaneurismer 

      Eriksen, Line; Johnsen, Liv-Hege (Master thesis; Mastergradsoppgave, 2002)

    • Prevalence of intracranial artery stenosis in a general population using 3D-time of flight magnetic resonance angiography 

      Johnsen, Liv-Hege; Herder, Marit; Vangberg, Torgil Riise; Isaksen, Jørgen Gjernes; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-20)
      Background: Data on prevalence of intracranial artery stenosis (ICAS) in Western populations is sparse. The aim of the study was to assess the prevalence and risk factors for ICAS in a mainly Caucasian general population. Methods: We assessed the prevalence of ICAS in 1847 men and women aged 40 to 84 years who participated in a cross-sectional population-based study, using 3-dimensional time-of-flight ...

    • Prevalence of unruptured intracranial aneurysms: impact of different definitions-the Tromsø Study 

      Johnsen, Liv-Hege; Herder, Marit; Vangberg, Torgil Riise; Kloster, Roar; Ingebrigtsen, Tor; Isaksen, Jørgen Gjernes; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-10)
      Background - Management of incidental unruptured intracranial aneurysms (UIAs) remains challenging and depends on their risk of rupture, estimated from the assumed prevalence of aneurysms and the incidence of aneurysmal subarachnoid haemorrhage. Reported prevalence varies, and consistent criteria for definition of UIAs are lacking. We aimed to study the prevalence of UIAs in a general population ...

    • Variations in the Circle of Willis in a large population sample using 3D TOF angiography: The Tromsø Study 

      Hindenes, Lars Bakke; Håberg, Asta; Johnsen, Liv-Hege; Mathiesen, Ellisiv B.; David, Robben; Vangberg, Torgil Riise (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-03)
      The main arteries that supply blood to the brain originate from the Circle of Willis (CoW). The CoW exhibits considerable anatomical variations which may have clinical importance, but the variability is insufficiently characterised in the general population. We assessed the anatomical variability of CoW variants in a community-dwelling sample (N = 1,864, 874 men, mean age = 65.4, range 40–87 years), ...