Long Chen¹, Ting Li¹, Liang Liu¹, Wenshuo Wang^2,*, Xiaoxiao Du³, Wei Wang³

CMES-Computer Modeling in Engineering & Sciences, Vol.139, No.3, pp. 2773-2806, 2024, DOI:10.32604/cmes.2024.046641 - 11 March 2024

Abstract This study explores the implementation of computed tomography (CT) reconstruction and simulation techniques for patient-specific valves, aiming to dissect the mechanical attributes of calcified valves within transcatheter heart valve replacement (TAVR) procedures. In order to facilitate this exploration, it derives pertinent formulas for 3D multi-material isogeometric hyperelastic analysis based on Hounsfield unit (HU) values, thereby unlocking foundational capabilities for isogeometric analysis in calcified aortic valves. A series of uniaxial and biaxial tensile tests is executed to obtain an accurate constitutive model for calcified active valves. To mitigate discretization errors, methodologies for reconstructing volumetric parametric models, More > Graphic Abstract

Hye Won Kwon^1,2, Mi Kyoung Song¹, Sang Yun Lee¹, Gi Beom Kim¹, Sungkyu Cho², Jae Gun Kwak², Woong-Han Kim², Whal Lee³, Eun Jung Bae^1,*

Congenital Heart Disease, Vol.17, No.3, pp. 281-295, 2022, DOI:10.32604/chd.2022.019065 - 03 May 2022

Abstract Background: Mechanisms and clinical manifestations of coronary artery complications after right ventricular outflow tract reconstruction surgery are not well known. Methods: Patients who had coronary artery complications after pulmonary valve replacement or the Rastelli procedure at a single tertiary centre were retrospectively analysed. Results: Coronary artery complications were identified in 20 patients who underwent right ventricular outflow tract reconstruction surgery. The median age at diagnosis of coronary artery complication was 21 years (interquartile range: 13–25 years). Mechanisms of coronary artery complications were compression by adjacent materials in 12 patients, dynamic compression of intramural course of coronary artery… More >

James A. Kuo¹, Tyler Hamby², Maham N. Munawar³, Eldad Erez⁴, Vincent K. H. Tam⁵

Congenital Heart Disease, Vol.14, No.4, pp. 651-656, 2019, DOI:10.1111/chd.12765

Abstract Objective: Various options exist for right ventricular outflow tract (RVOT) recon‐ struction in congenital heart disease. The Freestyle porcine aortic root may be used but its longevity is not well defined.
Design: We performed a retrospective review of all non‐Ross RVOT reconstructions using the Freestyle root in our institution. Survival and reintervention, either by sur‐ gery, transcatheter valve implantation, balloon valvuloplasty, or bare metal stent placement, were recorded. Factors associated with reintervention were assessed using Cox regression.
Results: Between January 2002 and December 2015, there were 182 patients identi‐ fied. Sixteen patients were lost to follow‐up and 3… More >