Stent and leaflet stresses in a 26-mm first-generation balloon-expandable transcatheter aortic valve Yue Xuan, PhD, Kapil Krishnan, PhD, Jian Ye, MD,

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Presentation transcript:

Stent and leaflet stresses in a 26-mm first-generation balloon-expandable transcatheter aortic valve Yue Xuan, PhD, Kapil Krishnan, PhD, Jian Ye, MD, Danny Dvir, MD, Julius M. Guccione, PhD, Liang Ge, PhD, Elaine E. Tseng, MD The Journal of Thoracic and Cardiovascular Surgery Volume 153, Issue 5, Pages 1065-1073 (May 2017) DOI: 10.1016/j.jtcvs.2016.12.016 Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Figure 1 A, Regions of interest studied for stress distribution in leaflets. Region 1 = upper leaflet free edges, region 2 = lower leaflet belly, and region 3 = sutured leaflet edges. B, Geometry of 26-mm Sapien Transcatheter Aortic Valve (Edwards Lifesciences, Irvine, Calif). C, Transcatheter aortic valve finite element mesh. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Figure 2 Principal stresses on entire leaflet assembly at 80 mm Hg under quasistatic conditions. A, Maximum. B, Minimum. Principal stresses on entire leaflet at 120 mm Hg under quasistatic conditions. C, Maximum. D, Minimum. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Figure 3 Under quasistatic conditions for region 1, principal stress at 80 mm Hg. A, Maximum B, Minimum. Principal stress at 120 mm Hg. C, Maximum. D, Minimum. For region 2, principal stresses at 80 mm Hg. E, Maximum. F, Minimum. Principal stresses at 120 mm Hg. G, Maximum. H, Minimum. For region 3, principal stresses at 80 mm Hg. I, Maximum. J, Minimum. Principal stresses at 120 mm Hg. K, Maximum. L, Minimum. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Figure 4 Comparison of principal stress contours for the 3 leaflet regions of interest at 80 and 120 mm Hg at quasistatic loading conditions. A, Maximum and B, Minimum. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Figure 5 Under quasistatic loading, principal stresses of stent at 80 mm Hg. A, Maximum. B, Minimum. Under quasistatic loading, principal stresses at 120 mm Hg. C, Maximum. D, Minimum. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Figure 6 For the noncylindrical geometry, maximum principal stress at 80 mm Hg. A, Leaflet top and bottom. B, Stent. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

The 26-mm Sapien Transcatheter Heart Valve (Edwards Lifesciences, Irvine, Calif). The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions

Video 1 Maximum principal stress on a 26-mm Sapien Transcatheter Aortic Valve's (Edwards Lifesciences, Irvine, Calif) leaflets and stent under quasistatic diastolic pressure. Video available at: http://www.jtcvsonline.org/article/S0022-5223(16)31806-2/addons. The Journal of Thoracic and Cardiovascular Surgery 2017 153, 1065-1073DOI: (10.1016/j.jtcvs.2016.12.016) Copyright © 2017 The American Association for Thoracic Surgery Terms and Conditions