Cardiac Shear Wave Velocity Detection in the Porcine Heart

Cardiac Shear Wave Velocity Detection in the Porcine Heart

Vos, H.J. (TU Delft ImPhys/Acoustical Wavefield Imaging; Erasmus MC)
van Dalen, Bas M. (Erasmus MC)
Heinonen, Ilkka (Erasmus MC; University of Turku)
Bosch, Johan G. (Erasmus MC)
Sorop, Oana (Erasmus MC)
Duncker, Dirk J. (Erasmus MC)
van der Steen, A.F.W. (TU Delft ImPhys/Acoustical Wavefield Imaging; Erasmus MC; Netherlands Heart Institute; Chinese Academy of Sciences)
de Jong, N. (TU Delft ImPhys/Acoustical Wavefield Imaging; Erasmus MC; University of Turku)

2017-04-01

Cardiac muscle stiffness can potentially be estimated non-invasively with shear wave elastography. Shear waves are present on the septal wall after mitral and aortic valve closure, thus providing an opportunity to assess stiffness in early systole and early diastole. We report on the shear wave recordings of 22 minipigs with high-frame-rate echocardiography. The waves were captured with 4000 frames/s using a programmable commercial ultrasound machine. The wave pattern was extracted from the data through a local tissue velocity estimator based on one-lag autocorrelation. The wave propagation velocity was determined with a normalized Radon transform, resulting in median wave propagation velocities of 2.2 m/s after mitral valve closure and 4.2 m/s after aortic valve closure. Overall the velocities ranged between 0.8 and 6.3 m/s in a 95% confidence interval. By dispersion analysis we found that the propagation velocity only mildly increased with shear wave frequency.

Echocardiography
High-frame-rate imaging
Shear wave elastography
Stiffness measurements
Valve closure

http://resolver.tudelft.nl/uuid:19f8c29d-20f8-4790-8a6e-6f8e715ed6a5

https://doi.org/10.1016/j.ultrasmedbio.2016.11.015

0301-5629

Ultrasound in Medicine & Biology, 43 (4), 753-764

Institutional Repository

journal article

© 2017 H.J. Vos, Bas M. van Dalen, Ilkka Heinonen, Johan G. Bosch, Oana Sorop, Dirk J. Duncker, A.F.W. van der Steen, N. de Jong