Blar i forfatter "Kjønås, Didrik"

Viser treff 1-7 av 7

    • Antibiotic treatment for appendicitis in Norway and Sweden: a nationwide survey on treatment practices 

      Gran, M.V.; Kjønås, Didrik; Gunnarsson, U.; Strigård, K.; Revhaug, Arthur; Aahlin, Eirik Kjus (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-15)
      Background: Appendicitis is one of the most common causes of acute abdomen. Uncomplicated appendicitis is as an infamed appendix without perforation, gangrene or abscess formation. Recent trials show that one can safely treat uncomplicated appendicitis with antibiotics, given patient approval and appropriate follow-up. A recent study has also indicated no diference between antibiotic treatment ...

    • Clinical and echocardiographic parameters predicting 1- and 2-year mortality after transcatheter aortic valve implantation 

      Kjønås, Didrik; Schirmer, Henrik; Aakhus, Svend; Eidet, Jo; Malm, Siri; Aaberge, Lars; Busund, Rolf; Røsner, Assami (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-06)
      <p><i>Background:</i> Transcatheter aortic valve implantation (TAVI) has become a standard treatment option for patients with symptomatic aortic stenosis. Elderly high-risk patients treated with TAVI have a high residual mortality due to preexisting comorbidities. Knowledge of factors predicting futility after TAVI is sparse and clinical tools to aid the preoperative evaluation are lacking. The aim ...

    • Echocardiographic assessment of diastolic dysfunction in elderly patients with severe aortic stenosis before and after aortic valve replacement 

      Caglayan, Hatice Akay; Kjønås, Didrik; Malm, Siri; Schirmer, Henrik; Røsner, Assami (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-28)
      Background - The 2016 guidelines of the American Society of Echocardiography (ASE) and European Association of Cardiovascular Imaging (EACVI) for evaluation of left ventricular (LV) diastolic dysfunction by Doppler flow and tissue Doppler- echocardiography do not adjust assessment of high filling pressures for patients with aortic stenosis (AS). However, most of the studies on this patient group ...

    • Prediction of outcome in patients with severe aortic stenosis treated with transcatheter aortic valve implantation 

      Kjønås, Didrik (Doctoral thesis; Doktorgradsavhandling, 2022-06-17)
      Surgical aortic valve replacement (SAVR) has until the last decade been the standard treatment for patients with aortic stenosis (AS). However, many patients were not offered surgical treatment due to high age or unacceptable surgical risk estimated by surgical risk scores. Transcatheter aortic valve implantation (TAVI) is a less invasive treatment modality where the valve is implanted using a ...

    • Predictors of early mortality after transcatheter aortic valve implantation 

      Kjønås, Didrik; Dahle, Gry; Schirmer, Henrik; Malm, Siri; Eidet, Jo; Aaberge, Lars; Steigen, Terje; Aakhus, Svend; Busund, Rolf; Rösner, Assami (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-23)
      <p><i>Objectives - </i>To investigate whether preoperative echocardiographic evaluation of ventricular function, especially right ventricular systolic and diastolic parameters including speckle-tracking analysis, could aid in the prediction of 30-day mortality after transcatheter aortic valve implantation (TAVI) in patients with aortic stenosis. <p><i>Methods - </i>This is a prospective observational ...

    • Risk scores for prediction of 30-day mortality after transcatheter aortic valve implantation: Results from a two-center study in Norway 

      Kjønås, Didrik; Schirmer, Henrik; Malm, Siri; Eidet, Jo; Aaberge, Lars; Steigen, Terje; Aakhus, Svend; Busund, Rolf; Røsner, Assami; Dahle, Gry (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-06)
      Objectives: Transcatheter aortic valve implantation (TAVI)-specific risk scores have been developed based on large registry studies. Our aim was to evaluate how both surgical and novel TAVI risk scores performed in predicting all cause 30-day mortality. In addition, we wanted to explore the validity of our own previously developed model in a separate and more recent cohort.<p> <p>Methods: The ...

    • Transcatheter aortic valve implantation (from inception to standard treatment): a single-center observational study 

      Høydahl, Martin Petter; Busund, Rolf; Rösner, Assami; Kjønås, Didrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-15)
      Background: Treatment of severe aortic stenosis with transcatheter aortic valve implantation (TAVI) was introduced in 2002. Since then, TAVI has become the primary treatment approach worldwide for advanced-age patients and younger patients with severe comorbidities. We aimed to evaluate the changes in patient demographics, complications, and mortality rates within 13 years.<p> <p>Methods: This ...