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Knut Matre

Emeritus
  • E-mailknut.matre@uib.no
  • Visitor Address
    Haukeland universitetssykehus, Laboratoriebygget
    5009 Bergen
  • Postal Address
    Postboks 7804
    5020 Bergen

Medical ultrasound

Cardiac mechanics

Acoustic phantoms

Teaching ultrasound methods and applications for students in:

Medicine

Physics

Postgraduate courses

Textbook
  • Show author(s) (2009). Innføring i abdominal ultrasonografi. Fagbokforlaget.
Academic article
  • Show author(s) (2022). Markers of Subclinical Atherosclerosis in Severe Obesity and One Year after Bariatric Surgery. Journal of Clinical Medicine.
  • Show author(s) (2021). The influence of region of interest width in fetal 2D-speckle tracking echocardiography late in pregnancy. The International Journal of Cardiovascular Imaging.
  • Show author(s) (2021). Speckle tracking derived strain in neonates: planes, layers and drift. The International Journal of Cardiovascular Imaging. 1-13.
  • Show author(s) (2021). One-year impact of bariatric surgery on left ventricular mechanics: results from the prospective FatWest study. European Heart Journal Open (EHJ Open).
  • Show author(s) (2021). Impact of arterio-ventricular interaction on first-phase ejection fraction in aortic stenosis. European Heart Journal-Cardiovascular Imaging. 1-8.
  • Show author(s) (2021). Effect of temporal and spatial smoothing on speckle–tracking-derived strain in neonates. Pediatric Cardiology. 743-752.
  • Show author(s) (2020). Left ventricular myocardial oxygen demand and subclinical dysfunction in patients with severe obesity referred for bariatric surgery. NMCD. Nutrition Metabolism and Cardiovascular Diseases. 1-9.
  • Show author(s) (2020). Covariables of myocardial function in women and men with increased body mass index. High Blood Pressure & Cardiovascular Prevention. 1-8.
  • Show author(s) (2019). Left ventricular myocardial dysfunction in young and middle-aged ischemic stroke patients: the Norwegian stroke in the young study. Journal of Hypertension. 538-545.
  • Show author(s) (2019). Left ventricular dysfunction after two hours of polarizing or depolarizing cardioplegic arrest in a porcine model. Perfusion. 67-75.
  • Show author(s) (2019). Effect of fitness on cardiac structure and function in overweight and obesity (the FATCOR study). NMCD. Nutrition Metabolism and Cardiovascular Diseases. 710-717.
  • Show author(s) (2019). A left ventricular phantom for 3D echocardiographic twist measurements. Biomedizinische Technik.
  • Show author(s) (2018). Left Ventricular Systolic Myocardial Function in Ankylosing Spondylitis . Arthritis care & research. 1276-1283.
  • Show author(s) (2017). Myocardial energy metabolism and ultrastructure with polarizing and depolarizing cardioplegia in a porcine model . European Journal of Cardio-Thoracic Surgery. 180-188.
  • Show author(s) (2017). Measured acoustic intensities for clinical diagnostic ultrasound transducers and correlation with thermal index. Ultrasound in Obstetrics and Gynecology. 236-241.
  • Show author(s) (2016). The influence of acute unloading on left ventricular strain and strain rate by speckle tracking echocardiography in a porcine model. American Journal of Physiology. Heart and Circulatory Physiology. H1330-H1339.
  • Show author(s) (2016). Optimal acquisition settings for speckle tracking echocardiography-derived strains in infants: An in vitro study. Ultrasound in Medicine and Biology. 1660-1670.
  • Show author(s) (2016). Myocardial function after polarizing versus depolarizing cardiac arrest with blood cardioplegia in a porcine model of cardiopulmonary bypass. European Journal of Cardio-Thoracic Surgery. 130-139.
  • Show author(s) (2016). Measured acoustic intensities for clinical diagnostic ultrasound transducers and correlation with thermal index. Ultrasound in Obstetrics and Gynecology. 236-241.
  • Show author(s) (2016). Disease activity is associated with reduced left ventricular systolic myocardial function in patients with rheumatoid arthritis. Annals of the Rheumatic Diseases. 371-376.
  • Show author(s) (2016). Carvedilol-enriched cold oxygenated blood cardioplegia improves left ventricular diastolic function after weaning from cardiopulmonary bypass. Journal of Cardiothoracic and Vascular Anesthesia. 859-868.
  • Show author(s) (2015). Myocardial function in aortic stenosis - insights from radial multilayer Doppler strain. Cardiovascular Ultrasound. 8 pages.
  • Show author(s) (2015). Intracoronary insulin administered at reperfusion in a porcine model of acute coronary syndrome. European Heart Journal: Acute Cardiovascular Care. 230-240.
  • Show author(s) (2015). Esmolol added in repeated, cold, oxygenated blood cardioplegia improves myocardial function after cardiopulmonary bypass. Journal of Cardiothoracic and Vascular Anesthesia. 684-693.
  • Show author(s) (2014). Reperfusion therapy with low-dose insulin or insulin-like growth factor 2; myocardial function and infarct size in a porcine model of ischaemia and reperfusion. Basic & Clinical Pharmacology & Toxicology. 438-447.
  • Show author(s) (2014). Effect of microbubble contrast on intracranial blood flow velocity assessed by transcranial Doppler. Journal of Ultrasound. 21-26.
  • Show author(s) (2013). The effects of reducing the thermal index for bone from 1.0 to 0.5 and 0.1 on common obstetric pulsed wave Doppler measurements in the second half of pregnancy. Acta Obstetricia et Gynecologica Scandinavica. 790-796.
  • Show author(s) (2013). The effect of ultrasound output level on obstetric biometric measurements. Ultrasound in Medicine and Biology. 37-43.
  • Show author(s) (2013). Multi-layer radial systolic strain vs. one-layer strain for confirming reperfusion from a significant non-occlusive coronary stenosis. European Heart Journal-Cardiovascular Imaging. 24-37.
  • Show author(s) (2013). Is strain by Speckle Tracking Echocardiography dependent on user controlled spatial and temporal smoothing? An experimental porcine study. Cardiovascular Ultrasound. 14 pages.
  • Show author(s) (2013). Accuracy of real-time single- and multi-beat 3-D speckle tracking echocardiography in vitro. Ultrasound in Medicine and Biology. 1006-1014.
  • Show author(s) (2012). Ultrasound safety in early pregnancy: reduced energy setting does not compromise obstetric Doppler measurements. Ultrasound in Obstetrics and Gynecology. 438-443.
  • Show author(s) (2012). Rome III subgroups of functional dyspepsia exhibit different characteristics of antral contractions measured by strain rate imaging. Ultraschall in der Medizin. 233-240.
  • Show author(s) (2011). Left ventricular strain, rotation, and torsion as markers of acute myocardial ischemia. American Journal of Physiology. Heart and Circulatory Physiology. H2142-H2154.
  • Show author(s) (2011). Antiapoptotic Intervention in Repeated Blood Cardioplegia: A Porcine Study of Myocardial Function. Annals of Thoracic Surgery. 784-792.
  • Show author(s) (2010). Radial deformation by tissue Doppler imaging in multiple myocardial layers. Scandinavian Cardiovascular Journal. 82-91.
  • Show author(s) (2010). Myocardial deformation in aortic valve stenosis – relation to left ventricular geometry. Heart. 106-112.
  • Show author(s) (2009). Strain measurement during antral contractions by ultrasound strain rate imaging: influence of erythromycin. Neurogastroenterology and Motility. 170-179.
  • Show author(s) (2009). Quantification of Valvular Regurgitation Area and Geometry Using HPRF 3-D Doppler. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 975-982.
  • Show author(s) (2009). Multidose cold oxygenated blood is superior to a single dose of bretschneider HTK-cardioplegia in the pig. Annals of Thoracic Surgery. 1205-1213.
  • Show author(s) (2008). Freehand real-time elastography: Impact of scanning parameters on image quality and In Vitro intra- and interobserver validations. Ultrasound in Medicine and Biology. 1638-1650.
  • Show author(s) (2008). Esmolol before 80 min of cardiac arrest with oxygenated cold blood cardioplegia alleviates systolic dysfunction. An experimental study in pigs. European Journal of Cardio-Thoracic Surgery. 9-17.
  • Show author(s) (2008). Crohn's disease: Comparison of in vitro ultrasonographic images and histology. Scandinavian Journal of Gastroenterology. 719-726.
  • Show author(s) (2007). Three-dimensional ultrasonography can detect the modulation of kidney volume in two-kidney, one-clip hypertensive rats. Ultrasound in Medicine and Biology. 1882-1888.
  • Show author(s) (2007). Multilayer radial systolic strain can identify subendocardial ischemia: An experimental tissue Doppler imaging study of the porcine left ventricular wall. European Heart Journal-Cardiovascular Imaging. 420-430.
  • Show author(s) (2006). In vitro strain measurement in the porcine antrum using ultrasound Doppler strain rate imaging. Ultrasound in Medicine and Biology.
  • Show author(s) (2006). In vitro strain measurement in the porcine antrum using Doppler strain rate imaging. Ultrasound in Medicine and Biology. 513-522.
  • Show author(s) (2006). A multimodal laser Doppler and endosonographic distension device for studying mechanosensation and mucosal blood flow in the oesophagus. Neurogastroenterology and Motility. 243-248.
  • Show author(s) (2005). Radial strain gradient across the normal myocardial wall in open-chest pigs measured with Doppler strain rate imaging. Journal of the American Society of Echocardiography. 1066-1073.
  • Show author(s) (2005). Assessment of regional timing of left ventricular sytolic longitudinal movement by Doppler tissue synchronization imaging in structurally normal hearts. European Heart Journal-Cardiovascular Imaging. 336-343.
  • Show author(s) (2004). Volume estimation of small phantoms and rat kidneys using three-dimensional ultrasonography and a position sensor. Ultrasound in Medicine and Biology. 1109-1117.
  • Show author(s) (2004). An anaesthetic protocol in the young domestic pig allowing neuromuscular blockade for studies of cardiac function following cardioplegic arrest and cardiopulmonary bypass. Acta Anaesthesiologica Scandinavica. 1144-1154.
  • Show author(s) (2003). The effect of body weight on the degree of blood velocity profile skewness in the aortic annulus in domestic pigs. Laboratory Animals. Journal of the Laboratory Animal Science Association. 72-80.
  • Show author(s) (2003). In vitro evaluation of ultrasound Doppler strain rate imaging: modification for measurement in a slowly moving tissue phantom. Ultrasound in Medicine and Biology. 1725-1734.
  • Show author(s) (2002). Strain during gastric contractions can be measured using Doppler ultrasonography. Ultrasound in Medicine and Biology. 1457-1465.
  • Show author(s) (2002). Release of cardiac troponin I after temporally graded acute coronary ischaemia with electrocardiographic ST depression. International Journal of Cardiology. 243-251.
  • Show author(s) (2002). Percutaneous assessment of coronary blood flow and cardiac biomarkers. Ultrasound in Medicine and Biology. 39-48.
  • Show author(s) (2002). Mechanical properties in the human gastric antrum using B-mode ultrasonography and antral distension. American Journal of Physiology - Gastrointestinal and Liver Physiology. G368-G375.
  • Show author(s) (2002). In vitro agreement between magnetic resonance imaging and intraluminal Doppler ultrasound for high flow velocity measurements. Scandinavian Cardiovascular Journal. 180-186.
  • Show author(s) (2002). Determination of plasma volume in anaesthetized piglets using the carbon monoxide (CO) method. Laboratory Animals. Journal of the Laboratory Animal Science Association. 344-350.
  • Show author(s) (1999). Velocity distribution in the ascending aorta in pigs during chronotropic and inotropic stimulation. Scandinavian Cardiovascular Journal. 199-205.
  • Show author(s) (1999). In vitro volume estimation of kidneys using three-dimensional ultrrasonography and a position sensor. European Journal of Ultrasound. 65-73.
  • Show author(s) (1998). Resetting of RBF autoregulation during acute pressure reduction in hypertensive rats. American Journal of Physiology. Regulatory Integrative and Comparative Physiology. 343-349.
  • Show author(s) (1998). In vitro evaluation of three-dimensional ultrasonography based on magnetic scanhead tracking. Ultrasound in Medicine and Biology. 1161-1167.
  • Show author(s) (1998). Dieulafoy's vascular malformation: role of endoscopic ultrasonography in therapeutic decision-making. Scandinavian Journal of Gastroenterology. 104-108.
  • Show author(s) (1998). Dieulafoy's vascular malformation: Role of endoscopic ultrasonography in therapeutic decision-making. Scandinavian Journal of Gastroenterology. 104-108.
  • Show author(s) (1998). Dieulafoy's vascular malformation: Role of endoscopic ultrasonography in therapeutic decision-making. Scandinavian Journal of Gastroenterology. 104-108.
  • Show author(s) (1997). Effects of velocity distribution. Diameter measurement and velocity tracing on the accuracy of cardiac output measurement by pulsed Doppler echocardiography in the aortic annulus. Ultrasound in Medicine and Biology. 177-185.
  • Show author(s) (1997). Effects of velocity distribution, diameter measurement and velocity tracing on the accuracy of cardiac output measurement by pulsed Doppler echocardiography in the aortic annulus. Ultrasound in Medicine and Biology. 177-185.
  • Show author(s) (1997). Effect of velocity distribution, diameter measurement and velocity tracing on the accuracy of cardiac output measurement by pulsed Doppler echocardiography in the aortic anulus of pigs. Ultrasound in Medicine and Biology. 177-185.
  • Show author(s) (1996). Velocity distribution in the aortic annulus in patients with primary dilated and ischemic cardiomyopathy measured using Doppler ultrasound. European Journal of Ultrasound. 211-221.
  • Show author(s) (1996). Three-dimensional cross-sectional velocity distribution in the ascending aorta in cardiac patients. Clinical Physiology. 239-258.
  • Show author(s) (1996). Three-dimensional cross-sectional velocity distribution in the ascending aorta in cardiac patients. Clinical Physiology. 239-258.
  • Show author(s) (1996). A practical method for estimating enclosed volumes using 3D ultrasound. European Journal of Ultrasound. 83-92.
  • Show author(s) (1995). Volume measurements of the antrum by 3D-ultrasonography and flow measurements through the pylorus by duplex technique. Digestive Diseases and Sciences. 97-100.
  • Show author(s) (1995). Velocity distribution in the left ventricular outflow tract in patients with aortic stenosis: effect on the measurement of aortic valve area by using continuity equation. European Heart Journal. 383-393.
  • Show author(s) (1995). The velocity distribution in the aortic anulus at different times during systole is mainly determined by the pattern of flow convergence in the left ventricular outflow tract: an experimental study using Doppler colour flow mapping. Clinical Physiology. 597-610.
  • Show author(s) (1995). Intraluminal recording of cross-sectional blood velocity distribution of human ascending aorta by ultrasound Doppler technique. Medical and Biological Engineering and Computing. 171-177.
  • Show author(s) (1995). In vivo comparison of 3D ultrasonography and Magnetic Response Imaging in volume estimation of human kidneys. Ultrasound in Medicine and Biology. 25-32.
  • Show author(s) (1994). Volume measurement of gastric antrum by 3-D ultrasonography and flow measurements through the pylorus by duplex technique. Digestive Diseases and Sciences. 97-100.
  • Show author(s) (1994). Volume estimation of the gastric antrum and the gallbladder in patients with non-ulcer dyspepsia and erosive prepyloric changes, using three-dimensional ultrasonography. Neurogastroenterology and Motility. 263-270.
  • Show author(s) (1994). Myocardial contraction patterns in non-ischaemic and ischaemic regions during acute coronary insufficiency. European Heart Journal. 424-433.
  • Show author(s) (1994). Intraluminal recording of cross-sectional blood velocity distribution of human ascending aorta by ultrasound doppler technique. Medical and Biological Engineering and Computing. 171-177.
  • Show author(s) (1994). In vitro evaluation of three-dimensional ultrasonography in volume estimation of abdominal organs. (Tilknyttet prosjektet: Pasienter med funksjonell dyspepsi studert v.h.a. 3-dimensjonal ultralyd.). Ultrasound in Medicine and Biology. 157-165.
  • Show author(s) (1994). Comparison of transit-time and Doppler ultrasound methods for measurement of flow in aortocoronary bypass grafts during cardiac surgery. The thoracic and cardiovascular surgeon. 170-174.
  • Show author(s) (1994). Comparison of transit-time and Doppler ultrasound methods for measurement of flow in aortocoronary bypass grafts during cardiac surgery. The thoracic and cardiovascular surgeon. 170-174.
  • Show author(s) (1993). Velocity distribution in the left ventricular outflow tract and the aortic anulus measured with Doppler colour flow mapping in normal subjects. European Heart Journal. 1179-1188.
  • Show author(s) (1993). New device shows enlarged antrum in dyspeptic patients. Internat Gastroenterol Observer. 5-6.
  • Show author(s) (1992). Untersuchungen der gastroduodenalen Motilität mit Realtime Ultrasonographie. Ultraschall in Klinik und Praxis.
  • Show author(s) (1992). Trabsendoskopische Ultraschalldiagnostik bei Läsionen im Oberen Verdauungstrakt im Rahmen der Routineendoskopi. Ultraschall in Klinik und Praxis. 99-103.
  • Show author(s) (1992). Effect of mesangiolysis on autoregulation of renal blood flow and glomerular filtration in rats. American Journal of Physiology - Renal, fluid and electrolyte physiology. F361-F366.
  • Show author(s) (1992). Coronary artery stenosis provokes nonuniformity of twodimensional deformation in the anterior wall of the feline left ventricle. European Heart Journal. 981-989.
  • Show author(s) (1992). Coronary artery stenosis provokes non-uniformity of two-dimensional deformation in the anterior wall of the feline left ventricle. European Heart Journal. 981-989.
  • Show author(s) (1992). Antroduodenal motility and movements of luminal contents studied by Duplex-sonography. Gastroenterology. 1583-1590.
  • Show author(s) (1990). Gradual reduction of coronary perfusion pressure in cats: changes in transmural distribution of blood flow. Scandinavian Journal of Clinical and Laboratory Investigation. 787-796.
  • Show author(s) (1987). Local myocardial function following coronary occlusion in cats. Effect on non-ischaemic regions. Clinical Physiology. 511-523.
Lecture
  • Show author(s) (2018). Left ventricular dysfunction after two hours of polarizing or depolarizing cardioplegic arrest in a porcine model of cardiopulmonary bypass.
Academic lecture
  • Show author(s) (2016). Myocardial energy status and ultrastructure with polarizing and depolarizing cardioplegic arrest in a porcine model.
  • Show author(s) (2014). Polariserende versus depolariserende kardioplegi med repetert, kaldt oksygenert blod i en eksperimentell dyremodell.
  • Show author(s) (2013). Quantitative myocardial perfusion analysis with contrast-enhanced ultrasound bolus tracking - preliminary animal results.
  • Show author(s) (2012). Multilayer radial strain analysis can detect successful reperfusion from a significant non-occlusive coronary stenosis. An experimental porcine study.
  • Show author(s) (2012). Experimental and clinical measurements of multilayer strain using TDI.
  • Show author(s) (2011). Tissue doppler imaging in open-chest pigs before and after pericardiotomy.
  • Show author(s) (2011). Multilayer strain can identify reperfusion from coronary stenosis.
  • Show author(s) (2011). Left ventricular strain and rotation as markers of acute myocardial ischemia.
  • Show author(s) (2011). Esmolol added to cold repeated oxygenated blood cardioplegia may increase cardiac function the first hours after declamping in a swine model.
  • Show author(s) (2010). Multilayer radial strain measurements detect reduction in myocardial perfusion before longitudinal, circumferential, radial strain and rotation. An experimental porcine study.
  • Show author(s) (2010). Low-grade coronary stenosis is first detected by multilayer strain measurements. An experimental porcine study.
  • Show author(s) (2010). Insulin-like growth factor-II in blood cardioplegia enhances myocardial contractility and stimulates anti-apoptotic mechanisms after reperfusion.
  • Show author(s) (2009). Insulinlignende vekstfaktor-II i blodkardioplegi øker kontraktilitet av myokard og stimulerer anti-apoptotiske mekanismer etter reperfusjon.
  • Show author(s) (2008). Quantification of Valvular Regurgitation Area and Geometry using HPRF 3D Doppler.
  • Show author(s) (2005). Muscularis mucosae, fibrosis and nodular lymphocyte aggregates in Crohn's disease - novel ultrasonographic findings in vitro.
  • Show author(s) (2001). Percutaneous assessment of coronary blood flow and cardiac markers.
  • Show author(s) (2000). A novel method using color Doppler ultrasonography to study relative strain of the muscle layers during antral contractions.
  • Show author(s) (2000). A novel method using color Doppler ultrasonography to study relative strain of the muscle layers during antral contractions.
  • Show author(s) (1996). Anpassning av TEE proben for stadieindelning av tumører i øvre gastrointestinalkanalen och preliminære resultat av 3D visualisering med multiplanprob.
  • Show author(s) (1995). In vitro evaluation of three-dimensional ultrasonography based on magnetic scanhead tracking. Oral presentation.
  • Show author(s) (1994). In Vivo Comparison of 3D Ultrasonography and Magnetic Resonance Imaging in Volume Estimation of Abdominal Organs.
  • Show author(s) (1994). Evaluering av 3D ultrasonografi in vitro. (Tilknyttet prosjektet: Pasienter med funksjonell dyspepsi studert v.h.a. 3-dimensjonal ultralyd.).
  • Show author(s) (1994). 3D ultrasonography compared with magnetic resonance imaging in volume estimation of human kidneys in vivo.
Editorial
  • Show author(s) (2013). 22nd World Congress on Ultrasound in Obstetrics and Gynecology, 9-13 September 2012, Copenhagen, Denmark: presentations and awards. Ultrasound in Obstetrics and Gynecology. 114-120.
Non-fiction book
  • Show author(s) (2011). 2011 Joint National Ph.D. Conference in Medical Imaging and MedViz Conference. Norwegian Research School in Medical Imaging, MedViz, University of Bergen.
  • Show author(s) (2009). Innføring i abdominal ultrasonografi. Fagbokforlaget.
Masters thesis
  • Show author(s) (2011). Utvikling av testrigg for ultralyd volum- og strainmålingar i hjarta.
  • Show author(s) (2011). Ultrasound phantom for myocardium. (Master thesis).
Popular scientific article
  • Show author(s) (1996). Evaluering av undervisningen i indremedisin ved Universitetet i Bergen. Effekt av økning i studenttall, ny studieplan og innføring i nytt studiested. UPED-skrift. 142-161.
  • Show author(s) (1996). Evaluering av undervisningen i indremedisin ved Universitetet i Bergen. Effekt av økning i studenttall, ny studieplan og innføring i nytt studiested. UPED-skrift. 142-161.
Letter to the editor
  • Show author(s) (2016). Response to: 'Disease activity and left ventricular systolic function in rheumatoid arthritis' by Giollo et al. Annals of the Rheumatic Diseases. e84-e84.
  • Show author(s) (2016). Reply: Esmolol Added in Cardioplegia. Journal of Cardiothoracic and Vascular Anesthesia. e9-e10.
Doctoral dissertation
  • Show author(s) (2019). Polarizing versus depolarizing blood cardioplegia. An experimental study of myocardial function, metabolism and ultrastructure following cardiopulmonary bypass and cardioplegic arrest.
  • Show author(s) (2017). Cardiac performance after adrenergic blocker-enriched blood cardioplegia. An evaluation of left ventricular function by pressure volume loops and myocardial deformation.
  • Show author(s) (2015). Myocardial protection and anti-apoptotic intervention at reperfusion. Experimental studies in translational porcine models of myocardial ischemia and reperfusion.
  • Show author(s) (2013). Myocardial deformation during ischemia and reperfusion. An experimental study of regional left ventricular function by Tissue Doppler Imaging and Speckle Tracking Echocardiography.
  • Show author(s) (2011). A Porcine Model for Studies of Cardioplegia. Assessment of left ventricular myocardial function after cardioplegic arrest by pressure-volume loops, tissue Doppler imaging and microspheres.
  • Show author(s) (2009). Left ventricular structure and systolic function in aortic valve stenosis : influence of global left ventricular load, gender and hypertension. 1-2009.
  • Show author(s) (1988). Invasive ultrasound for assessment of cardiac function : application of transit-time ultrasound for evaluation of myocardial contraction, and Doppler ultrasound for measure- ment of cardiac output.
Academic chapter/article/Conference paper
  • Show author(s) (2012). Real Time Image-Based Tracking of 4D Ultrasound Data. 8 pages.
  • Show author(s) (2011). Medical imaging. 28 pages.
  • Show author(s) (2005). The Use of Ultrasound in Biomechanics. 31 pages.
  • Show author(s) (2005). Basic Technologies in Ultrasound. 21 pages.
  • Show author(s) (1995). In vitro evaluation of three dimensional ultrasonography in volume estimation of organs. 2 pages.
Abstract
  • Show author(s) (2016). A twisting left ventricular ultrasound phantom for evaluation of 3D speckle tracking twist measurements. European Heart Journal, Supplement. ii51-ii51.
  • Show author(s) (2015). Optimizing speckle tracking echocardiography strain measurements in infants: an in-vitro phantom study . European Heart Journal-Cardiovascular Imaging. 102-129.
  • Show author(s) (2014). Determinants of left ventricular systolic function after transcatheter aortic valve implantation. European Heart Journal-Cardiovascular Imaging.
  • Show author(s) (2012). The effect of ultrasound power level on obstetric biometric measurements. Acta Obstetricia et Gynecologica Scandinavica. 124-124.
  • Show author(s) (2011). Multilayer radial strain measurements can detect early reperfusion from ischemia. An experimental porcine study. European Heart Journal-Cardiovascular Imaging. ii83-ii83.
  • Show author(s) (2011). Increased systolic strain rate early after transcatheter aortic valve implantation. European Heart Journal-Cardiovascular Imaging. ii37-ii37.
  • Show author(s) (2011). Impact of aortic valve stenosis and hypertension on radial strain in multiple layers. European Heart Journal, Supplement. 1008-1009.
  • Show author(s) (2011). Accuracy of real-time single and multi beat 3D speckle tracking echocardiography in vitro. European Heart Journal-Cardiovascular Imaging. ii5-ii6.
  • Show author(s) (2010). Multilayer radial strain measurements detect reduction in myocardial perfusion before longitudinal, circumferential, radial strain and rotation. An experimental porcine study. European Heart Journal-Cardiovascular Imaging. ii3-ii4.
  • Show author(s) (2009). 2D Longitudinal Myocardial Strain: A More Sensitive Parameter of Left Ventricular Dysfunction in Aortic Valve Stenosis? Circulation. S372-S373.
  • Show author(s) (2008). The differential impact of static and pulsatile blood pressure components on regional myocardial deformation in patients with asymptomatic aortic valve stenosis. A SEAS substudy. Journal of Hypertension. S255-S256.
  • Show author(s) (2005). Systolic radial strain in 3 layers across the myocardial wall in normal humans. European Heart Journal-Cardiovascular Imaging. S92.
  • Show author(s) (2005). Radial strain in 4 layers across the left ventricular wall. An experimental TVI study in pigs demonstrating the influence of ischaemia. European Heart Journal-Cardiovascular Imaging. S192.
  • Show author(s) (1991). Left coronary artery stenosis provokes nonuniformity of myocardial contraction. Hjerteforum. Abstr. 91.
Poster
  • Show author(s) (2015). Polarizing versus depolarizing cardiac arrest with repeated, cold, oxygenated blood cardioplegia in a translational porcine model.
  • Show author(s) (2011). Doppler strain rate imaging in open-chest pigs before and after pericardiotomy.
  • Show author(s) (2011). Assessing load independent measures of contractility by pressure-strain loops during acute preload reduction.
  • Show author(s) (2004). Assessment of Regional Timing of Left Ventricular Longitudinal Movement by Tissue Synchronization Imaging.
  • Show author(s) (2002). A Doppler ultrasound method to study strain of antral contractions.
  • Show author(s) (2001). Strain rate imaging- a novel Doppler ultrasound method to study antral contractions.
  • Show author(s) (1995). The dynamic change of the systolic velocity distribution in the aortic annulus is closely related to the pattern of flow convergence in the left ventricular outflow tract.
  • Show author(s) (1993). The velocity distribution in the left ventricular outflow tract: effect on aortic stenosis area measurement.
  • Show author(s) (1993). Flow velocity distribution in the aortic annulus in patients with congestive heart failure.
Academic literature review
  • Show author(s) (2019). What is left ventricular strain in healthy neonates? A systematic review and meta-analysis. Pediatric Cardiology. 1-11.
  • Show author(s) (2013). Doppler av kar. Indremedisineren. 14-17.

More information in national current research information system (CRIStin)

1. Effect of left ventricular hypertrophy on myocardial strain and torsion

2. Studies on myocardial dysfunction following ischemia and reperfusion

3. Develoment of acoustic phantoms

4. Accuracy of cardiac 3D deformation methods

B.Sc. Applied Physics, Heriot-Watt University, Edinburgh, Scotland

M.Sc. Medical Physics, Aberdeen University, Scotland

dr.philos (ph.D.), University of Bergen