Turbulent Kinetic Energy Loss and Shear Stresses Before and After Transcatheter Aortic Valve Replacement

Stefan Toggweiler; Bart De Boeck; Ozge Karakas; Utku Gülan

doi:10.1016/j.jaccas.2022.01.009

Turbulent Kinetic Energy Loss and Shear Stresses Before and After Transcatheter Aortic Valve Replacement

JACC Case Rep. 2022 Mar 2;4(5):318-320. doi: 10.1016/j.jaccas.2022.01.009.

Authors

Stefan Toggweiler¹, Bart De Boeck^{1

2}, Ozge Karakas³, Utku Gülan³

Affiliations

¹ Heart Center Lucerne, Luzerner Kantonsspital, Lucerne, Switzerland.
² Department of Radiology, Luzerner Kantonsspital, Lucerne, Switzerland.
³ Hi-D Imaging, Winterthur, Switzerland.

Abstract

Blood flow and shear stresses were quantified using 4-dimensional flow cardiac magnetic resonance and 3-dimensional particle velocimetry before and after transcatheter aortic valve replacement (TAVR). TAVR reduced turbulent kinetic energy by 47% and shear stresses by 33%, illustrating that the benefit of TAVR extends beyond a simple reduction in transvalvular gradients. (Level of Difficulty: Advanced.).

Keywords: 3-dimensional imaging; CMR, cardiac magnetic resonance; TAVR, transcatheter aortic valve replacement; aortic valve; bicuspid aortic valve; hemodynamics; valve replacement.