Research groups
Publications
Academic article
- Knut Qvale Søndenaa; Ola Alexander Schei; Rasmus Bach Sindre et al. (2025). Impact of Eccentric Residual Mitral Regurgitation on Long-Term Survival After Transcatheter Edge-to-Edge Mitral Valve Repair. (external link)
- Andreas Egeli Valeur; Victorien Emile Prot; Hans Martin Dahl Aguilera et al. (2025). Mitral annular remodelling after STEMI is associated with new-onset dilatation of the left cardiac chambers and impaired left atrial function. (external link)
- Hans Martin Aguilera; Stig Urheim; Robert Persson et al. (2022). Finite element analysis of mitral valve annuloplasty in Barlow's disease. (external link)
- Umael Khan; Stig Urheim; Sahrai Saeed (2023). Post-systolic shortening in the context of peri-myocarditis: two clinical imaging vignettes. (external link)
- Stig Urheim; Stein Inge Rabben; Helge Skulstad et al. (2005). Regional myocardial work by strain Doppler echocardiography and LV pressure: a new method for quantifying myocardial function. (external link)
- Mohammad Javad Sadeghinia; Robert Persson; Vegard Skalstad Ellensen et al. (2024). Quantified planar collagen distribution in healthy and degenerative mitral valve: biomechanical and clinical implications. (external link)
- Thomas von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2004). Mechanisms of elevated plasma endothelin-1 in CHF: congestion increases pulmonary synthesis and secretion of endothelin-1. (external link)
- Christine Bjørkvik Erevik; Øyunn Kleiven; Vidar Frøysa et al. (2024). Echocardiographic assessment of myocardial efficiency predicts exercise performance. (external link)
- Christine Bjørkvik Erevik; Øyunn Kleiven; Vidar Frøysa et al. (2024). Exercise-Induced Cardiac Troponin I Elevation Is Associated With Regional Alterations in Left Ventricular Strain in High-Troponin Responders. (external link)
- Pawel Kozlowski; Stig Urheim; Eigil Samset (2017). Evaluation of a multi-view autostereoscopic real-time 3D ultrasound system for minimally invasive cardiac surgery guidance. (external link)
- Erik Lyseggen; Stein Inge Rabben; Helge Skulstad et al. (2005). Myocardial Acceleration During Isovolumic Contraction, Relationship to Contractility. (external link)
- Johannes Just Hjertaas; Eigir Einarsen; Eva Gerdts et al. (2023). Impact of aortic valve stenosis on myocardial deformation in different left ventricular levels: A three-dimensional speckle tracking echocardiography study. (external link)
- S.I Rabben; N Stergiopulos; LR Hellevik et al. (2004). An ultrasound-based method for determining pulse wave velocity in fuperficial arteries. (external link)
- Erik Lyseggen; Helge Skulstad; T Helle-Valle et al. (2005). Myocardial strain analysis in acute coronary occlusion. A tool to assess myocadial viability and reperfusion. (external link)
- Stig Urheim; T P Abraham; J Korinek et al. (2005). Increased right ventricular afterload induces postsystolic thickening of the ventricular septum in nonischemic hearts. (external link)
- J Wang; T P Abraham; J Korinek et al. (2005). Delayed onset of subendocardial diastolic thinning at rest identifies hypoperfused myocardium. (external link)
- Stig Urheim; S Cauduro; R Frantz et al. (2005). Relation of tissue displacement and strain to invasively determined right ventricular stroke volume. (external link)
- J Wang; J Korinek; Stig Urheim et al. (2005). Direct identification of subendocardial postsystolic thickening by intracardiac M-mode Doppler echocardiography. (external link)
- Helge Skulstad; Stig Urheim; Thor Edvardsen et al. (2006). Grading of myocardial dysfunction by tissue Doppler echocardiography: a comparison between velocity, displacement, and strain imaging in acute ischemia. (external link)
- Thomas Skaug; Brage H. Amundsen; Torbjørn Hergum et al. (2014). Quantification of aortic regurgitation using high-pulse repetition frequency three-dimensional colour Doppler. (external link)
- Stig Urheim; Thor Edvardsen; Kjetil Steine et al. (2003). Postsystolic shortening of ischemic myocardium: a mechanism of abnormal intraventricular filling. (external link)
- Robert Matongo Persson; Hans Martin Dahl Aguilera; Ketil Grong et al. (2024). Characterisation of global and regional mitral annular strains in an acute porcine model. (external link)
- Victorien Emile Prot; Hans Martin Dahl Aguilera; Bjørn Helge Skallerud et al. (2025). A method for non-invasive estimation of mitral valve annular regional strains. (external link)
- Hans Martin Dahl Aguilera; Robert Persson; Rune Haaverstad et al. (2023). In silico analysis provides insights for patient-specific annuloplasty in Barlow's disease. (external link)
- Thor Edvardsen; Stig Urheim; Helge Skulstad et al. (2000). Relative timing of myocardial and transmitral early filling velocities - a non-invasive marker of LV restoring forces. (external link)
- Dana Cramariuc; Boel Johnsen; Nicolai Maroni Johannessen et al. (2021). An unusual cause of prosthetic aortic valve thrombosis detected by multimodality imaging. (external link)
- Stig Urheim; R. Bjørnerheim; Knut Endresen et al. (2002). Quantification of left ventricular diastolic pressure-volume relations during routine cardiac catheterization by two-dimensional digital echo quantification and left ventricula micromanometer. (external link)
- Christine Bjørkvik Erevik; Øyunn Kleiven; Vidar Frøysa et al. (2023). Myocardial inefficiency is an early indicator of exercise-induced myocardial fatigue. (external link)
- Karl-Andreas Dumont; John Peder Escobar Kvitting; Jørn S. Karlsen et al. (2018). Validation of a holographic display for quantification of mitral annular dynamics by three-dimensional echocardiography. (external link)
- Karl-Andreas Dumont; Jørn Skaarud Karlsen; Thomas Michael Helle-Valle et al. (2015). Mitral valve analysis adding a virtual semi-transparent annulus plane for detection of prolapsing segments. (external link)
- John Morud; Paal Skjetne; Stig Urheim et al. (2019). The effect of chordae tendineae on systolic flow. (external link)
- Jørn Bersvendsen; Matthew Toews; Adriyana Danudibroto et al. (2016). Robust spatio-Temporal registration of 4D cardiac ultrasound sequences. (external link)
- Stig Urheim; Thor Edvardsen; Hans Torp et al. (2000). Myocardial strain by Doppler echocardiography. Validation of a new method to quantify regional mayocardial function. (external link)
- Helge Skulstad; Thor Edvardsen; Stig Urheim et al. (2002). Postsystolic shortening in ischemic myocardium:active contraction or passive recoil?. (external link)
- Anne Pernille Ofstad; Stig Urheim; Håvard Dalen et al. (2015). Identification of a definite diabetic cardiomyopathy in type 2 diabetes by comprehensive echocardiographic evaluation: A cross-sectional comparison with non-diabetic weight-matched controls. (external link)
- Christian Engelsen Berg-Hansen; Rasmus Bach Sindre; Lisa Marie Dale Grymyr et al. (2024). Sex differences in left atrial volumes, mechanics, and stiffness in primary mitral regurgitation - a combined 2D and 3D echocardiographic study. (external link)
- Anne Pernille Ofstad; Odd Erik Johansen; Lars Gullestad et al. (2014). Neutral impact on systolic and diastolic cardiac function of 2 years of intensified multi-intervention in type 2 diabetes: The randomized controlled Asker and Bærum Cardiovascular Diabetes (ABCD) study. (external link)
- Mohammadjavad Sadeghinia; Hans Martin Dahl Aguilera; Stig Urheim et al. (2023). Mechanical behavior and collagen structure of degenerative mitral valve leaflets and a finite element model of primary mitral regurgitation. (external link)
- Jøger Hansegård; Stig Urheim; Erik Steen et al. (2005). Detection of the myocardial boundary in the left ventricle from simultaneously acquired triplane ultrasound images using multi view active appearance motion models. (external link)
- Robert Persson; Hans Martin Dahl Aguilera; John-Peder Kvitting et al. (2023). Mitral annular dynamics are influenced by left ventricular load and contractility in an acute animal model. (external link)
- Kaspar Broch; Stefano De Marchi; Richard J Massey et al. (2017). Left Ventricular Contraction Pattern in Chronic Aortic Regurgitation and Preserved Ejection Fraction: Simultaneous Stress-Strain Analysis by Three-Dimensional Echocardiography. (external link)
- Thor Edvardsen; Stig Urheim; Helge Skulstad et al. (2002). Quantification of left ventricular systolic function by tissue Doppler echocardiography: Added value of measuring pre- and postejection velocities in ischimic myocardium. (external link)
- Jan Otto Beitnes; Lars Gunnar Klæboe; Jørn Skaarud Karlsen et al. (2015). Mitral valve analysis using a novel 3D holographic display: a feasibility study of 3D ultrasound data converted to a holographic screen. (external link)
- Hans Martin Aguilera; Stig Urheim; Bjørn Helge Skallerud et al. (2021). Influence of Annular Dynamics and Material Behavior in Finite Element Analysis of Barlow’s Mitral Valve Disease. (external link)
- Jørn Bersvendsen; Jan Otto Beitnes; Stig Urheim et al. (2014). Automatic measurement of aortic annulus diameter in 3-dimensional transoesophageal echocardiography. (external link)
- Jøger Hansegård; Stig Urheim; Ketil Lunde et al. (2007). Constrained Active Appearance Models for Segmentation of Triplane Echocardiograms. (external link)
- J Wang; Stig Urheim; J Korinek et al. (2006). Analysis of Postsystolic Myocardial Thickening Work in Selective Myocardial Layers During Progressive Myocardial Ischemia. (external link)
- Sahrai Saeed; Jenna Smith; Karine Grigoryan et al. (2019). Impact of pulmonary hypertension on outcome in patients with moderate or severe tricuspid regurgitation. (external link)
- Joerg Kellermair; Sahrai Saeed; Helmut W. Ott et al. (2020). High-molecular-weight von Willebrand Factor multimer ratio differentiates true-severe from pseudo-severe classical low-flow, low-gradient aortic stenosis. (external link)
- Jørn Bersvendsen; Fredrik Orderud; Øyvind Haugen Lie et al. (2017). Semiautomated biventricular segmentation in three-dimensional echocardiography by coupled deformable surfaces. (external link)
- Jøger Hansegård; Stig Urheim; Ketil Lunde et al. (2009). Semi-automated quantification of left ventricular volumes and ejection fraction by real-time three-dimensional echocardiography. (external link)
- Karl-Andreas Dumont; Hans Martin Aguilera; Robert Persson et al. (2022). Mitral Annular Elasticity Determines Severity of Regurgitation in Barlow's Mitral Valve Disease. (external link)
- Paul Roger Leinan; Thomas Grønli; Paal Skjetne et al. (2022). Comparison of ultrasound vector flow imaging and CFD simulations with PIV measurements of flow in a left ventricular outflow trackt phantom - Implications for clinical use and in silico studies. (external link)
- Hans H Bjørnstad; Tor H. Bjørnstad; Stig Urheim et al. (2009). Long-Term Assessment of Electrocardiographic and Echocardiographic Findings in Norwegian Elite Endurance Athletes. (external link)
- Kaspar Broch; Stig Urheim; Mai Tone Lønnebakken et al. (2016). Controlled release metoprolol for aortic regurgitation: a randomised clinical trial. (external link)
- Kaspar Broch; Stig Urheim; Richard Massey et al. (2016). Exercise capacity and peak oxygen consumption in asymptomatic patients with chronic aortic regurgitation. (external link)
- Jørn Bersvendsen; Fredrik Orderud; Richard Massey et al. (2016). Automated Segmentation of the Right Ventricle in 3D Echocardiography: A Kalman Filter State Estimation Approach. (external link)
Conference lecture
- Stig Urheim; Reidar Bjørnerheim; Knut Endresen et al. (2001). Quantifications of left ventricular diastolic pressure-volume relations during routine catherization by two-dimensional digital echo quanticication and LV micromanometer. (external link)
- Stig Urheim; Thor Edvardsen; Helge Skulstad et al. (2001). Assessment of regional myocardial function by combined color flow imaging and strain Doppler echocardiography. (external link)
- Helge Skulstad; Thor Edvardsen; Stig Urheim et al. (2001). Afterload depedency of contraction patterns in ischaemic myocardial - consequences for assessment of myocardial viability by strain Doppler echocardiography. (external link)
- Harald Kjekshus; Tor Edardsen; Stig Urheim et al. (2001). Regional levels of plasma endothelin:Important roles of the pulmonary and splanchnic circulations in the secretions and clearance of ET-1 during the development of heart failure. (external link)
- Harald Kjekshus; Otto A. Smiseth; Thor Edvardsen et al. (2000). Regional levels of plasma endothelin: Important roles of the pulmonary and splanchnic circulations in the secretion and clearance of plasma ET-1 during the development of heart failure. (external link)
- Stig Urheim (2001). Studies of ventricular fluid-wall interactions by combined imaging of myocardial strain and intraventricular flow. Mini-symposium: Myocardial tissue Doppler and strain echocardiography. How to improve the techniques. (external link)
- Stig Urheim (2001). Validation of stranin Doppler echocardiography. (external link)
- Stig Urheim (2001). Studies of ventricular fluid wall interactions by combined imaging of myocardial strain and intraventricular flow. (external link)
- Stig Urheim (2001). Assessment of regional caontractile function by Doppler-derived strain. (external link)
- Sigrid Kaarstad Dahl; Are Johan Simonsen; Paul Roger Leinan et al. (2019). Beslutningsstøtte for behandlingsplanlegging av hjertesykdom basert på pasient-spesifikke strømningssimulering i hjertet. (external link)
- Thomas von Lueder; Harald Kjekshus; Erik Øie et al. (2003). Molecular Basis of Increased Plasma Endothelin-1 Levels in Congestive Heart Failure. (external link)
- Thomas von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Molecular Mechanisms of Increased Plasma Endothelin-1 Levels in Congestive Heart Failure. (external link)
- Jøger Hansegård; Stig Urheim; Erik Steen et al. (2005). Detection of the myocardial boundary in the left ventricle from simultaneously acquired triplane ultrasound images using multi view active appearance motion models. (external link)
- T Von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Regulation of endothelin-1 in heart failure: Pulmonary congetion increases plasma ET-1 levels by augmentin regional tissue ECE-1 activity. (external link)
- T Von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Regulation of emdothelin-1 in heart failure: Pulmonary congestion increases plasma ET-1 levels by augmentin regional tissue ECE-1 activity. (external link)
- T Von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Molecular mechanisms of increased plasma endothelin-1 levels in congestive heart failure. (external link)
- T Von Lueder; Harald Kjekshus; Erik Øie et al. (2003). Molecular basis of increased plasma endothelin-1 levels in congestive heart failure. (external link)
- T Von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Regulation of ET-1 in heart failure: Pulmonary congestion increase plasma ET-1 levels by up-regulation of regional tissue ECE-1 activity. (external link)
- Stig Urheim (2001). Urheim, S. Validation of stranin Doppler echocardiography. (external link)
- Thor Edvardsen; Stig Urheim; Helge Skulstad et al. (1999). Relative timing of myocardial and transmitral early filling velocities - a non-invasive marker of LV restoring forces. (external link)
- Thor Edvardsen; Stig Urheim; Kjetil Steine et al. (1998). Reversal of intraventricular flow during isovolumic relaxation - a marker of anterior myocardial ischemia. (external link)
- Thor Edvardsen; Stig Urheim; Kjetil Steine et al. (1999). Doppler tissue imaging expresses non-uniformity of left ventricular diastolic function during regional ischemia. (external link)
- Stig Urheim; Kjetil Steine; Thor Edvardsen et al. (1997). Intraventricular diastolic shunting during acute myocardial ischemia. (external link)
- Erik Lyseggen; Helge Skulstad; Thomas Helle-Valle et al. (2004). Echocardiographic Markers of Myocardial Viability and Reperfusion - Combined Assessment of Segmental Lengthening/Shortening Ratio and Regional Compliance by Strain Doppler Echocardiography. (external link)
- Erik Lyseggen; Helge Skulstad; Thomas Helle-Valle et al. (2004). Echocardiographic Markers of Myocardial Viability and Reperfusion - Combined Assessment of Segmental Lengthening/Shortening Ratio and Regional Compliance by Strain Doppler Echocardiography. (external link)
- Thomas von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Regulation of Endothelin-1 in Heart Failure: Pulmonary Congestion Increases Plasma ET-1 Levels by Augmenting Regional Tissue ECE-1 Activity. (external link)
- Thomas von Lueder; Harald Kjekshus; Thor Edvardsen et al. (2003). Regulation of ET-1 in Heart Failure: Pulmonary Congestion Increases Plasma ET-1 Levels by Up-Regulation of Regional Tissue ECE-1 Activity. (external link)
- Stig Urheim; Stein Inge Rabben; Erik Lyseggen et al. (2002). Regional myocardial work index by strain Doppler echocardiography and left ventricular pressure - a new method for quantifying myocardial function. (external link)
- Thor Edvardsen; Stig Urheim; Helge Skulstad et al. (2002). Identification of dyskinetic myocardium by Doppler tissue imaging - the importance of isovolumic phase analysis. (external link)
- Helge Skulstad; Stig Urheim; Thor Edvardsen et al. (2002). Tissue Doppler Echocardiography and strain Doppler echocardiography: a head-to-head comparision in moderate and severe ischemia. (external link)
- Erik Lyseggen; Stein Inge Rabben; Helge Skulstad et al. (2002). Myocardial acceleration during isovolumic contraction - is it really a sensitive index of myocardial function?. (external link)
- Erik Lyseggen; Helge Skulstad; Stig Urheim et al. (2002). Myocardial elasticity by Strain Doppler Echocardiography - a method to identify viable myocardium. (external link)
- Stig Urheim; Kjetil Steine; Thor Edvardsen et al. (1997). Intraventrikulær diastolisk shunting ved akutt myokardischemi. (external link)
- Stein Inge Rabben; N Stergiopulos; LR Hellevik et al. (2002). An ultrasound-based method for determining pulse-wave velocity in the carotid artery. (external link)
- Thor Edvardsen; Stig Urheim; Kjetil Steine et al. (1997). Reversal of intraventricular flow during isovolumic relaxation - A marker of anterior myocardial ischaemia. (external link)
- Helge Skulstad; Stein Inge Rabben; Thor Edvardsen et al. (2002). Mechanisms of post-ejection shortening in ischemic myocardium: an answer by regional pressure-segment length analysis. (external link)
- Stig Urheim; Harald Kjekshus; T. Edvartsen et al. (2001). Marked non-uniformity in myocardial strain rate and strain by Doppler echocardiography in pacing-induced heart failure. (external link)
Academic literature review
- Otto A. Smiseth; Hans Torp; Anders Opdahl et al. (2016). Myocardial strain imaging: How useful is it in clinical decision making?. (external link)
- Stig Urheim; Kai Andersen; Svend Aakhus (2012). Tredimensjonal ultralydundersøkelse i kardiologisk diagnostikk. (external link)
- Abukar Mohamed Ali; Erik Packer; Tom Roar Omdal et al. (2023). Echocardiography Assessment of Rheumatic Heart Disease: Implications for Percutaneous Balloon Mitral Valvuloplasty. (external link)
- Håvard Dingen; Stig Urheim; Stina Jordal et al. (2023). Echocardiographic assessment in infective endocarditis: Transthoracic or transesophageal echocardiography, or both?: Echocardiography in endocarditis. (external link)
- Sahrai Saeed; Abukar Mohamed Ali; Daanyaal Wasim et al. (2023). Correlation between Murmurs and Echocardiographic Findings; From an Imaging Cardiologist Point of View. (external link)
Conference abstract
- Stig Urheim; Kaspar Broch; R Massey et al. (2013). Left ventricular contraction pattern in asymptomatic patients with moderate to severe aortic regurgitation. (external link)
- Anne Pernille Ofstad; Håvard Dalen; Kåre I. Birkeland et al. (2013). Impaired left ventricular diastolic function and increased systolic contractions in type 2 diabetes compared to healthy controls: a case-control study. (external link)
- Stefano De Marchi; Stig Urheim; Espen W. Remme et al. (2012). Area strain for the assessment of regional left ventricular wall thickening using 3D Speckle Tracking. (external link)
- Atle Solholm; Cedric Davidsen; Erik Packer et al. (2020). Is combined use of Impella® and VA-ECMO better than VA-ECMO alonein refractory cardiogenic shock?. (external link)
- Hans Martin Dahl Aguilera; Robert Matongo Persson; Rune Haaverstad et al. (2022). Mitral annulus strain by 3D echo reveals regional annular dysfunction in Barlow's disease. (external link)
Academic book chapter
- Paul Roger Leinan; Paal Skjetne; John Morud et al. (2017). Velocity profiles in a 2D model of the left ventricular outflow tract, pathological case study using PIV and CFD modeling. (external link)
- Hans Martin Dahl Aguilera; Victorien Emile Prot; Bjørn Helge Skallerud et al. (2019). Finite Element Analysis of a Barlow Mitral Valve: Patient Specific Geometry and Comparison With Three-Dimensional Echocardiographic Data. (external link)
Doctoral thesis (PhD)
Conference poster
- Thor Edvardsen; Stig Urheim; Kjetil Steine et al. (1999). Regional diastolisk funksjon under ischemi målt ved vevsdoppler. (external link)
- Thor Edvardsen; Stig Urheim; Kjetil Steine et al. (1999). Regional diastolic function during ischemia meassured with doppler tissue imaging. (external link)
- Stig Urheim; Kjetil Steine; Thor Edvardsen et al. (1997). Intraventrikulær diastolisk shunting ved akutt myokardischemi. (external link)
- Helge Skulstad; Erik Lyseggen; Thor Edvardsen et al. (2003). The ratio between systolic lengthening and postsystolic shortening: a marker of myocardial viability. (external link)
- Hans Martin Dahl Aguilera; Robert Persson; Rune Haaverstad et al. (2022). Mitral annulus strain by 3D echo reveals regional annular dysfunction in Barlow's disease. (external link)