In his PhD thesis, Lars Christian Naterstad Lervik has shown that ultra-high frame rate tissue Doppler imaging is feasible and clinically useful.


MAIN RESULTS:

  1. Ultra-high-frame-rate tissue Doppler imaging provides additional information to conventional tissue Doppler imaging in early and late systole.
  2. Ultra-high frame rate imaging identifies scarred myocardium and differentiated transmural from non-transmural distribution of myocardial scar on a segmental level.
  3. Analysis of strain rate by data from ultra-high frame rate tissue Doppler imaging is feasible in a larger number of segments compared with strain rate by conventional tissue Doppler imaging.

THESIS DEFENCE:

Thesis: Ultra-high frame rate tissue Doppler imaging, technical feasibility and first clinical experiences
Candidate: Lars Christian Naterstad Lervik
Time: November 23, 2017 at 12:15
Place: Medical Technical Research Centre, St. Olavs Hospital: Auditorium MTA
Link to university website (in Norwegian)


SUMMARY:

(1) Lervik and co-workers describe a new tissue Doppler imaging method with a frame rate of 1200 frames per second in a four-chamber apical view. Feasibility of the new method was confirmed in ten healthy volunteers, as peak annular velocities and time to peak S′ intervals were in good agreement with measurements from conventional tissue Doppler imaging. The ultra-high frame rate method also provided additional information in early and late systole, as it was able to separate the timing of electrical activation, start of mechanical contraction, mitral valve closure and start of ejection.

(2) Retrospective spectral Doppler from ultra-high frame rate imaging enables assessment of strain rate without the influence of clutter seen by convensional tissue Doppler imaging. In 20 patients with a recent myocardial infarction the new method was the only one that differentiated transmural from non-transmural distribution of myocardial scar on a segmental level. The method also had several other advantages compared to the conventional method.


REFERENCES:

Brekke, B., Nilsen, L. C., Lund, J., Torp, H., Bjastad, T., Amundsen, B. H., Støylen, A., & Aase, S. A. (2014). Ultra-high frame rate tissue Doppler imagingUltrasound in medicine & biology40(1), 222-231.

Lervik, L. C. N., Brekke, B., Aase, S. A., Lønnebakken, M. T., Stensvåg, D., Amundsen, B. H., Torp, H., & Støylen, A. (2017). Myocardial Strain Rate by Anatomic Doppler Spectrum: First Clinical Experience Using Retrospective Spectral Tissue Doppler from ULTRA-HIGH FRAME RATE IMAGINGUltrasound in Medicine & Biology

Latest News

May 21, 2025

Successful NORHEART seminar on Cardiac Metabolism in Tromsø

Last week, 41 researchers from Norway and abroad attended the seminar “Pathways and Regulatory Mechanisms…

Read more
April 10, 2025

The Heart Research Award to professor Sigrun Halvorsen

Professor Sigurn Halvorsen receives the Heart Research Award by the Norwegian Health Association. Sigrun Halvorsen…

Read more
April 05, 2025

Another successful Methods In Cardiac Research course completed

This year, 10 students participated in the three-day course, organized by NORHEART and the IEMR…

Read more
January 05, 2025

NORHEART is now on LinkedIn

NORHEART is excited to launch our brand new LinkedIn page. On this page you will…

Read more
Norheart uses cookies for analytical purposes, content and ads customisation, and to further develop our services.
Accept
Learn more
Show again