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Figure 4 MRI-guided in vivo catheter manipulation. The position of the catheter tip (green icon) was visualized in real-time as the catheter was manipulated within the registered 3D MRI construct to the mitral valve annulus (shown in right-posterior oblique and left-lateral views, A and B, respectively). The corresponding MEAM image is shown in left lateral view (C), along with the corresponding intracardiac electrogram (inset) depicting the characteristic electrophysiologic signature of the mitral valve, videlicet, concurrent atrial and ventricular electrograms. Abbreviations as in Figure 1.
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