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Maxantalet träffar du kan exportera från sökgränssnittet är 250. Vid större uttag använd dig av utsökningar.
  • 1.
    Bjällmark, Anna
    et al.
    KTH, Huddinge, Sweden.
    Larsson, M.
    KTH, Huddinge, Sweden.
    Lundback, S.
    Inovacor AB, Vaxholm, Sweden.
    Johnsson, J.
    GrippingHeart AB, Stockholm, Sweden.
    Winter, R.
    Karolinska University Hospital, Huddinge, Sweden.
    Brodin, L.-A.
    Karolinska University Hospital, Huddinge, Sweden.
    A new graphical user interface module generating state diagrams of the heart2006Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 7, nr suppl_1, s. S46-Artikel i tidskrift (Refereegranskat)
  • 2.
    Bjällmark, Anna
    et al.
    KTH, Medicinsk teknik.
    Lind, Britta
    KTH, Medicinsk teknik.
    Brodin, Lars-Åke
    KTH, Medicinsk teknik.
    Peolsson, Michael
    KTH, Skolan för teknik och hälsa (STH).
    Shahgaldi, Kambiz
    KTH, Medicinsk teknik.
    Nowak, Jacek
    Ultrasonographic strain imaging is superior to conventional non-invasive measures of vascular stiffness in the detection of age-dependent differences in the mechanical properties of the common carotid artery2010Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 11, nr 7, s. 630-636Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aims: Elastic properties of large arteries have been shown to deteriorate with age and in the presence of atherosclerotic vascular disease. In this study, the performance of ultrasonographic strain measurements was compared to conventional measures of vascular stiffness in the detection of age-dependent differences in the elastic properties of the common carotid artery.

    Methods and results: In 10 younger (25-28 years, 4 women) and 10 older (50-59 years, 4 women) healthy individuals, global and regional circumferential and radial strain variables were measured in the short-axis view of the right common carotid artery using ultrasonographic two-dimensional (2D) strain imaging with recently introduced speckle tracking technique. Conventional elasticity variables, elastic modulus (Ep) and β stiffness index, were calculated using M-mode sonography and non-invasive blood pressure measurements. Global and regional circumferential systolic strain and strain rate values were significantly higher (p < 0.001, p < 0.01 for regional late systolic strain rate) in the younger individuals, whereas the values of conventional elasticity variables in the same group were lower (p < 0.05). Among all strain and conventional elasticity variables, principal component analysis and its regression extension identified only circumferential systolic strain variables as contributing significantly to the observed discrimination between the younger and older age groups.

    Conclusion: Ultrasonographic 2D-strain imaging is a sensitive method for the assessment of elastic properties in the common carotid artery, being in this respect superior to conventional measures of vascular elasticity. The method has potential to become a valuable non-invasive tool in the detection of early atherosclerotic vascular changes.

  • 3.
    Gustafsson, U
    et al.
    Umeå University Hospital, Umeå, Sweden.
    Larsson, M.
    Royal Institute of Technology, Stockholm, Sweden.
    Bjällmark, Anna
    Royal Institute of Technology, Stockholm, Sweden.
    Lindqvist, P.
    Umeå University Hospital, Umeå, Sweden.
    A'roch, R.
    Umeå University Hospital, Umeå, Sweden.
    Haney, M.
    Umeå University Hospital, Umeå, Sweden.
    Waldenstrom, A.
    Umeå University Hospital, Umeå, Sweden.
    The rotation axis of the left ventricle in acute myocardial ischemia2010Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 11, nr suppl_2, s. ii124-ii154, artikel-id P908Artikel i tidskrift (Refereegranskat)
  • 4.
    Gustafsson, U
    et al.
    Umeå University Hospital, Umeå, Sweden.
    Larsson, M.
    Royal Institute of Technology, Stockholm, Sweden.
    Bjällmark, Anna
    Royal Institute of Technology, Stockholm, Sweden.
    Lindqvist, P.
    Umeå University Hospital, Umeå, Sweden.
    Brodin, L.
    Royal Institute of Technology, Stockholm, Sweden.
    Waldenstrom, A.
    Umeå University Hospital, Umeå, Sweden.
    The rotation axis of the left ventricle. A new concept in cardiac function2010Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 11, nr suppl_2, s. ii45-ii75, artikel-id P499Artikel i tidskrift (Refereegranskat)
  • 5.
    Hayashi, S Y
    et al.
    Royal Institute of Technology, Stockholm, Sweden.
    Bjällmark, Anna
    Royal Institute of Technology, Stockholm, Sweden.
    Larsson, M
    Royal Institute of Technology, Stockholm, Sweden.
    Nascimento, MM
    Karolinska Institute, Stockholm, Sweden.
    Lindholm, B
    Karolinska Institute, Stockholm, Sweden.
    Lind, B
    Royal Institute of Technology, Stockholm, Sweden.
    Seeberger, A
    Karolinska Institute, Stockholm, Sweden.
    Nowak, J
    Karolinska Institute, Stockholm, Sweden.
    Riella, MC
    Pro­Renal Foundation, Curitiba, Brazil.
    Brodin, LA
    Royal Institute of Technology, Stockholm, Sweden.
    Ultrasonographic 2D strain imaging in common carotid artery, a new approach to the evaluation of arterial stiffness in patients with chronic kidney disease2010Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 11, nr suppl_2, s. ii12-ii41, artikel-id P367Artikel i tidskrift (Refereegranskat)
  • 6.
    Jacobsen, P.-H.
    et al.
    Karolinska University Hospital, Stockholm, Sweden.
    Winter, R.
    Karolinska University Hospital, Stockholm, Sweden.
    Bjällmark, Anna
    Royal Institute Of Technology, Stockholm, Sweden.
    Larsson, M.
    Royal Institute Of Technology, Stockholm, Sweden.
    Nygren, M.
    Karolinska University Hospital, Stockholm, Sweden.
    Westholm, C.
    Karolinska University Hospital, Stockholm, Sweden.
    Brodin, L.-Å.
    Royal Institute Of Technology, Stockholm, Sweden.
    Bull's eye presentation of speckle tracking data: A simple and user independent method for detection of regional myocardial ischemia2006Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 7, nr suppl_1, s. S85-Artikel i tidskrift (Refereegranskat)
  • 7.
    Larsson, M.
    et al.
    Royal Institute of Technology, Stockholm, Sweden.
    Kremer, F
    Catholic University of Leuven, Leuven, Belgium.
    Kouznetsova, T
    Catholic University of Leuven, Leuven, Belgium.
    Bjällmark, Anna
    Royal Institute of Technology, Stockholm, Sweden.
    Lind, B
    Royal Institute of Technology, Stockholm, Sweden.
    Brodin, L.
    Royal Institute of Technology, Stockholm, Sweden.
    D'hooge, J
    Royal Institute of Technology, Stockholm, Sweden.
    Radial and longitudinal strain assessment in the carotid artery wall using speckle tracking2010Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 11, nr suppl_2, s. ii12-ii41, artikel-id P364Artikel i tidskrift (Refereegranskat)
  • 8.
    Larsson, M
    et al.
    Royal Institute of Technology, Stockholm, Sweden.
    Larsson, M
    Royal Institute of Technology, Stockholm, Sweden.
    Bjällmark, Anna
    Royal Institute of Technology, Stockholm, Sweden.
    Winter, R
    Karolinska University Hospital, Huddinge, Sweden.
    Caidah, K
    Karolinska University Hospital, Stockholm, Sweden.
    Brodin, L-A
    Royal Institute of Technology, Stockholm, Sweden.
    A novel technique to visualize target specific polymeric contrast agents2011Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 12, nr suppl_2, s. ii90-ii120, artikel-id P725Artikel i tidskrift (Refereegranskat)
  • 9.
    Mårtensson, Mattias
    et al.
    KTH, Medicinsk bildteknik.
    Bjällmark, Anna
    KTH, Medicinsk teknik.
    Brodin, Lars-Åke
    KTH, Medicinsk teknik.
    Evaluation of tissue Doppler-based velocity and deformation imaging: a phantom study of ultrasound systems.2011Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 12, nr 6, s. 467-476Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    AIMS: The objective of this study was to test the accuracy and diagnostic interchangeability of tissue Doppler-based displacement, velocity, strain, and strain rate measurements in commercially used ultrasound (US) systems. METHODS AND RESULTS: Using an in-house made phantom, four different US scanner models were evaluated. Two different scanners of the same model were tested, and one scanner acquisition was tested twice with two generations of the same workstation giving six test results in total. The scanners were in active clinical use and are subject to regular maintenance checks. There were three displacement and four velocity results that stood out from the rest and could be regarded as accurate and interchangeable. Among the deformation measurements, three acceptable strain results were found while there were no acceptable strain rate results. Furthermore, the study showed that measurements from scanners of the same model, same acquisition post-processed on different workstations and repeated measurements from the same scanner, can yield disparate results. CONCLUSION: Measurements that are accurate and of interchangeable use can be found for displacement and velocity measurements, but are less likely to be found for strain and strain rate measurements. It is strongly recommended that the ability of each individual US scanner to measure displacement, velocity, strain, and strain rate is evaluated before it is introduced into clinical practice, and it must always be evaluated together with the workstation the scanner is intended to be used in conjunction with.

  • 10.
    Westholm, C
    et al.
    Karolinska University Hospital, Stockholm, Sweden.
    Bjällmark, Anna
    Karolinska University Hospital, Stockholm, Sweden.
    Larsson, M
    Karolinska University Hospital, Stockholm, Sweden.
    Winter, R
    Karolinska University Hospital, Stockholm, Sweden.
    Jacobsen, P
    Karolinska University Hospital, Stockholm, Sweden.
    Nygren, M
    Karolinska University Hospital, Stockholm, Sweden.
    Brodin, L-Å
    Karolinska University Hospital, Stockholm, Sweden.
    Velocity tracking: a new user independent method for bedside detection of myocardial ischemia2007Ingår i: European Journal of Echocardiography, ISSN 1525-2167, E-ISSN 1532-2114, Vol. 7, nr suppl_1, s. S37-, artikel-id 292Artikel i tidskrift (Refereegranskat)
1 - 10 av 10
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  • en-US
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