Key result
The proposed oval St. Jude Medical valve demonstrated hemodynamic improvements over the conventional SJM valve, characterized by lower shear stress, wall shear stress, and valve pressure drop.
Why the study?
Does the proposed oval SJM valve improve hemodynamic performance compared to the conventional SJM valve in a computational model?
Does the proposed oval SJM valve improve hemodynamic performance compared to the conventional SJM valve in a computational model?
A novel oval design for the St. Jude Medical bileaflet mechanical heart valve demonstrates improved computational hemodynamics compared to the conventional design, suggesting potential for further development.
In this study, the hemodynamic performance of the conventional St. Jude Medical (SJM) valve and our proposed design known as the oval SJM valve are studied and compared. These studies are based on a wide range of physiological heart rates, i.e., 70–130[Formula: see text]bpm, in the opening phase. We designed and developed a precise computational platform to assess the hemodynamics of bileaflet mechanical heart valves for laminar and turbulent regimes. Also, as one of the fundamental changes applied to the conventional SJM vales, the housing is considered oval similar to oval shape of annulus. Results clearly indicate hemodynamic improvements in the proposed design over the SJM valve. The improvements are characterized by lower shear stress and wall shear stress distributions around the valve and leaflets, and lower valve pressure drop compared to that of the conventional SJM model. The proposed design shows potential and merits additional development.
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Jahandardoost et al. (2018) studied Bileaflet mechanical heart valves. Proposed oval St. Jude Medical (SJM) valve vs. Conventional St. Jude Medical (SJM) valve was evaluated on Hemodynamic performance (shear stress, wall shear stress, and valve pressure drop). The proposed oval St. Jude Medical valve demonstrated hemodynamic improvements over the conventional SJM valve, characterized by lower shear stress, wall shear stress, and valve pressure drop.
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