A double-pulse stereo photogrammetry technique has been developed for the dynamic assessment of the leaflet deformation of bioprosthetic heart valves under simulated physiological conditions. By using a specially designed triggering technique, which takes the advantage of the field transfer mechanisms of the charge coupled device camera, two consecutive images separated by a time interval as short as 5 ms were captured. This made it possible to investigate the realistic leaflet deformation during the valve opening and closing processes which typically last 25-45 ms. This technique was applied to assess a newly developed pericardial valve leaflet in a physiological pulse flow loop. Quantitative leaflet deformations of the valve opening and closing were generated from sequences of digital images. The results can later be applied to finite element analysis of bioprosthetic heart valve leaflet stress and strain during a complete cardiac cycle.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1114/1.1432690 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Redo Surgical Aortic Valve Replacement versus Valve-in-Valve Transcatheter Aortic Valve Replacement for Degenerated Bioprosthetic Valves.
Ann Thorac Surg
January 2025
Division of Cardiothoracic Surgery, University of Virginia Health University Hospital, Charlottesville, VA.
Background: Valve-in-valve transcatheter aortic valve replacement (ViV-TAVR) is associated with improved perioperative safety compared to redo surgical aortic valve replacement (redo-SAVR), but long-term outcomes remain uncertain. We therefore compare long-term outcomes of ViV-TAVR and redo-SAVR.
Methods: The study included 1:1 propensity-matched Medicare beneficiaries with degenerated bioprosthetic valves admitted between 09/29/2011 and 12/30/2020 undergoing either redo-SAVR or ViV-TAVR.
Comparison between the fluid-structure interaction approach and the finite element method approach to analyze the leaflet flutter in bioprosthetic aortic valve.
J Biomech
January 2025
Universidade Federal de São João Del-Rei, Praça Frei Orlando, 170, São João Del Rei, Minas Gerais, Brazil. Electronic address:
The low durability of bioprosthetic heart valves (BHV), between 10-15 years, is associated with the development of leaflets flutter. Despite increasing calcification and structural damage of the BHV, leaflets flutter is an understudied condition. Therefore, the objective of this study is compare the oscillation characteristics of BHV leaflets obtained by the finite element method (FEM) technique and by the fluid-structural interaction (FSI) technique.
View Article and Find Full Text PDFTotal autologous reconstruction of the right and left ventricular outflow tracts: the case for the modified Ross-Ozaki procedure.
Multimed Man Cardiothorac Surg
January 2025
Department of Cardiothoracic Surgery, Faculty of Medicine, Mansoura University Mansoura, Egypt.
The Ross procedure continues to be the best procedure to address unrepairable aortic valve pathology, especially in young adults. The Achilles heel of this procedure has been aortic root dilation and the potential need for a reoperation that may be associated with slightly increased risks in addition to the need for intervention on the pulmonary outflow tract. Modifying the Ross procedure by autograft inclusion inside a Dacron graft seems to have the potential advantage of stabilizing the autograft diameter, which may be associated with improved durability and decrease the need for future intervention.
View Article and Find Full Text PDFSevere aortic valve stenosis poses a significant risk for the aging population, often escalating from mild symptoms to life-threatening heart failure and sudden death. Without timely intervention, this condition can lead to disastrous outcomes. The advent of transcatheter aortic valve implantation (TAVI) has gained popularity, emerging as an effective alternative for managing severe aortic stenosis (AS) in high-risk patients experiencing deterioration of previously implanted bioprosthetic surgical aortic valves (SAV), which introduces complex challenges such as device compatibility and anatomical considerations.
View Article and Find Full Text PDFIncidence and Outcomes of Prosthetic Valve Endocarditis in Adults with Congenital Heart Disease.
Am Heart J
January 2025
Department of Cardiovascular Medicine, Mayo Clinic Rochester, MN 55905. Electronic address:
Background: Patients with congenital heart disease (CHD) often require prosthetic valve implantation, increasing their lifetime risk of developing prosthetic valve endocarditis (PVE). The purpose of this study was to determine the incidence, risk factors, and outcomes of PVE in adults with CHD.
Method: Retrospective cohort study of adults with CHD and prior prosthetic valve implantation (2003-2023).
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!