Beating-heart patch closure of muscular ventricular septal defects under real-time three- dimensional echocardiographic guidance: A preclinical study

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Date of download: 6/3/2016 Copyright © The American College of Cardiology. All rights reserved. From: Closure of Atrial Septal Defects With the Amplatzer.

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Beating-heart patch closure of muscular ventricular septal defects under real-time three- dimensional echocardiographic guidance: A preclinical study Nikolay V. Vasilyev, MD, Ivan Melnychenko, MD, Kazuo Kitahori, MD, PhD, Franz P. Freudenthal, MD, Alistair Phillips, MD, Rainer Kozlik-Feldmann, MD, Ivan S. Salgo, MD, MS, Pedro J. del Nido, MD, Emile A. Bacha, MD The Journal of Thoracic and Cardiovascular Surgery Volume 135, Issue 3, Pages 603-609 (March 2008) DOI: 10.1016/j.jtcvs.2007.09.045 Copyright © 2008 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 Patch deployment device: front view (A), rear view (B), and minianchors (C). Polyester patch material is attached to the nitinol frame by using a 0.1-mm release nitinol wire (red arrows). During deployment, the arms of the anchor (a) penetrate the patch and attach it to the septal tissue, while the loop (l) stays on the front side of the patch. The Journal of Thoracic and Cardiovascular Surgery 2008 135, 603-609DOI: (10.1016/j.jtcvs.2007.09.045) Copyright © 2008 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 Scheme of the procedure. Explanations are shown in the text. LV, Left ventricle; RV, right ventricle; VSD, ventricular septal defect. The Journal of Thoracic and Cardiovascular Surgery 2008 135, 603-609DOI: (10.1016/j.jtcvs.2007.09.045) Copyright © 2008 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 Color Doppler images of the created ventricular septal defect. A, Two-dimensional color Doppler scanning. B, Three-dimensional color Doppler scanning. The yellow arrow points to the orifice of the ventricular septal defect on the left side of the ventricular septum. C, The same three-dimensional color Doppler image with suppression of the black-and-white image. Yellow dashed lines demonstrate the ventricular septal defect tunnel inside the ventricular septum. LV, Left ventricle; RV, right ventricle; VSD, ventricular septal defect. The Journal of Thoracic and Cardiovascular Surgery 2008 135, 603-609DOI: (10.1016/j.jtcvs.2007.09.045) Copyright © 2008 The American Association for Thoracic Surgery Terms and Conditions

Figure 4 Ventricular septal defect patch closure demonstration ex vivo (left column) and sequence of the real-time three-dimensional echocardiographic (RT3DE) images acquired during the procedure (right column): view from the left ventricle. A and B, The patch is delivered through an introducer sheath toward the ventricular septal defect (yellow arrowhead). C and D, After the frame expands (blue arrowheads) and the patch covers the ventricular septal defect, it is attached to the ventricular septum by the nitinol minianchors (blue dots). Note the segmented polymer coating of the anchor-deployment device for optimizing the instrument visualization under ultrasonographic guidance. E and F, All the anchors are deployed, and the patch is completely attached to the septum, closing the ventricular septal defect. G and H, The release wire is removed, and the frame is withdrawn into the introducer sheath. The patch (red arrowheads) is left attached to septum. I and J, Final view: patch and anchors (blue dots). The Journal of Thoracic and Cardiovascular Surgery 2008 135, 603-609DOI: (10.1016/j.jtcvs.2007.09.045) Copyright © 2008 The American Association for Thoracic Surgery Terms and Conditions

Figure 5 A, Two-dimensional color Doppler image of the closed ventricular septal defect. The patch (red arrowheads) completely sealed the ventricular septal defect. B and C, Postmortem photographs: view from the right ventricle (B) and left ventricle (C). The patch is properly fixed around the 10-mm ventricular septal defect. No residual defect is present. LV, Left ventricle; RV, right ventricle; VSD, ventricular septal defect. The Journal of Thoracic and Cardiovascular Surgery 2008 135, 603-609DOI: (10.1016/j.jtcvs.2007.09.045) Copyright © 2008 The American Association for Thoracic Surgery Terms and Conditions