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Cardiac MRI visualization for ventricular tachycardia ablation

Abstract

Objective

The integrated visualization of cardiac MRI during a ventricular tachycardia (VT) mapping and ablation procedure would provide improved catheter guidance and tissue assessment. We developed a system for and explored the added value of simultaneous visualization of intracardiac voltage measurements and MRI-derived myocardial scar information during VT ablation procedures.

Method

We propose the use of a synchronized 3D and 2D view. In 3D, the catheter will be guided optimally by assessing 3D scar characteristics and its relation to the ventricular anatomy. In 2D, a detailed assessment of the tissue can be made. We developed several 3D visualization techniques, including volume rendering of the scar and myocardial surfaces colored according to the voltage measurements. We also visualized context structures in the heart. For the 2D view, we proposed showing three adjacent slices simultaneously. To link the 3D with the 2D view, we added a linking plane and linking contours; the slice level shown in the 2D view is indicated in the 3D view.

Results

We evaluated our method via a case study during which we simulated the visual environment of an ablation procedure. The MRI-based volume rendering of scar tissue and the linking between the 3D and 2D views were both positively received. However, the visualization of the voltage measurements was found to be hard to interpret, partly due to the perceptually suitable but non-standard colormap.

Conclusions

Based on this study, we can conclude that our approach of displaying MRI data and integrating it with voltage measurements has potential to improve VT ablation procedures.

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Correspondence to Rob J. van der Geest.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Godeschalk-Slagboom, C.J., van der Geest, R.J., Zeppenfeld, K. et al. Cardiac MRI visualization for ventricular tachycardia ablation. Int J CARS 7, 753–767 (2012). https://doi.org/10.1007/s11548-012-0776-4

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  • DOI: https://doi.org/10.1007/s11548-012-0776-4

Keywords

  • Multi-modal visualization
  • Cardiac MRI
  • Ventricular tachycardia
  • Catheter ablation