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. 2024 Feb 1;26(2):euae034.
doi: 10.1093/europace/euae034.

Wall shear stress in outflow tract premature ventricular contraction location assessed through 4D-flow MRI

Virgile Chevance  1   2 , Arshid Azarine  2 , David A Hamon  3   4 , Tarvinder S Dhanjal  5 , Emmanuel Teiger  3 , Jean-François Deux  1   6 , Nicolas Lellouche  3
Affiliations

Wall shear stress in outflow tract premature ventricular contraction location assessed through 4D-flow MRI

Virgile Chevance et al. Europace. .
No abstract available

Keywords: 4D-flow MRI; Cardiac imaging; Premature ventricular contraction; Right ventricular outflow tract; Wall shear stress.

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Conflict of interest statement

Conflict of interest: none declared.

Figures

Figure 1
Figure 1
Illustration of the right ventricular ejection pathway segmentation method and correlation with electrophysiological findings. (A) Colorimetric streamline of the systolic flows in the aorta and the right ventricular ejection pathway. White arrowhead: position for the wall shear stress (WSS) analysis under the pulmonary annulus. (B) Colorimetric flow mapping in the RVOT and PA. Arrow: position for the analysis slice transverse to the main axis of the PA, under the pulmonary valve. (C) Transverse slice of the RVOT under the PA (position on B). Circumferential WSS analysis in colorimetric mapping. White arrowhead: area of relative heterogeneity of the WSS. (D) From the section obtained in C, red arrow, segmentation according to the six-segment method with the same angular arc of the subvalvular RVOT walls. Posterior adjacent to the aorta. Anterior proximal to the left internal mammary. Posterior and anterior septal on the LV side. Posterior and anterior lateral on the RV free wall side. White arrowhead: area of focal heterogeneity in WSS of the posterior–septal wall of the RVOT in this patient. (E and F) Colocalization on the same patient of the PVC focus on electrophysiological ablation maps with activation (E) and amplitude (F) map showing the common focus at the posterior–septal segment of the RVOT with the lowest EGM amplitude (black circle). (G) Final ablation map showing a colocalization with the WSS hyperpessure patch. Ao, aorta; LV, left ventricle; PA, pulmonary artery; RVOT, right ventricular outflow tract.
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