• A left ventricular phantom for 3D echocardiographic twist measurements 

      Hjertaas, Johannes Just; Matre, Knut (Peer reviewed; Journal article, 2020)
      Traditional two-dimensional (2D) ultrasound speckle tracking echocardiography (STE) studies have shown a wide range of twist values, also for normal hearts, which is due to the limitations of short-axis 2D ultrasound. The ...
    • Myocardial function in aortic stenosis - insights from radial multilayer Doppler strain 

      Cramariuc, Dana; Gerdts, Eva; Hjertaas, Johannes Just; Cramariuc, Alexandru; Davidsen, Einar Skulstad; Matre, Knut (Peer reviewed; Journal article, 2015-02-19)
      Background Left ventricular (LV) radial tissue Doppler imaging (TDI) strain increases gradually from the subepicardial to the subendocardial layer in healthy individuals. A speckle tracking echocardiography study suggested ...