Midterm results of transapical aortic valve replacement via real-time magnetic resonance imaging guidance Keith A. Horvath, MD, Dumitru Mazilu, PhD,

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Presentation transcript:

Midterm results of transapical aortic valve replacement via real-time magnetic resonance imaging guidance Keith A. Horvath, MD, Dumitru Mazilu, PhD, Michael Guttman, MS, Arthur Zetts, Timothy Hunt, Ming Li, PhD The Journal of Thoracic and Cardiovascular Surgery Volume 139, Issue 2, Pages 424-430 (February 2010) DOI: 10.1016/j.jtcvs.2009.08.005 Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 Bioprosthesis mounted on a platinum–iridium stent. A stainless steel marker welded on the side of the stent between the commissures (A). The marker is visible as a dark signal in the MRI and indicates the orientation of the prosthesis (B). The short-axis view and long-axis view of the prosthesis with a passive marker under real-time MRI are shown in parts C and D, respectively. In parts C and D, 2 blue dots are the digital markers that indicate the coronary ostia and the yellow dot is the digital marker of the aortic annulus location. The Journal of Thoracic and Cardiovascular Surgery 2010 139, 424-430DOI: (10.1016/j.jtcvs.2009.08.005) Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 Real-time MRI provided superior visualization for implanting the aortic valve prosthesis. Snapshots show multiple image planes displayed at their relative 3-dimensional position. The 3-dimensional rendering provides 3-dimensional anatomic information. The Journal of Thoracic and Cardiovascular Surgery 2010 139, 424-430DOI: (10.1016/j.jtcvs.2009.08.005) Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 Long-term follow-up MRI scans at 1, 3, and 6 months postoperatively. The Journal of Thoracic and Cardiovascular Surgery 2010 139, 424-430DOI: (10.1016/j.jtcvs.2009.08.005) Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions

Figure 4 Aortic valve and mitral valve regurgitation of 7 animals with long-term survival. The Journal of Thoracic and Cardiovascular Surgery 2010 139, 424-430DOI: (10.1016/j.jtcvs.2009.08.005) Copyright © 2010 The American Association for Thoracic Surgery Terms and Conditions