Aortic Valve Reconstruction with Ozaki Technique

Ricciardi, Gabriella; Biondi, Raoul; Tamagnini, Gabriele; Giglio, Mauro Del

doi:10.21470/1678-9741-2020-0476

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…When everything is working as it should, the annulus of the aortic valve expands during the systolic phase and contracts during the diastolic phase. 21 …”

Section: Discussionmentioning

confidence: 99%

Outcomes of Ozaki Procedure/Aortic Valve Neocuspidization for Aortic Valve Diseases: A Systematic Review

Badalyan

2023

Anatol J Cardiol

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Background: Perfect heart valve prostheses have optimized hemodynamics, reduced surgical morbidity, long-lasting durability, and extended patient survival with greater quality of life. Mechanical valves are recommended; however, young children may need anticoagulant medication for life. In this study, we looked at the success rate and viability of aortic valve neocuspidization (AVNeo) surgery for a variety of aortic disorders. Methods: A methodical search strategy was used to fully evaluate the AVNeo results. Boolean operators were used to combine important words like “Ozaki Procedure,” “Aortic Valve Neocuspidization,” “AVNeo,” and associated terms. Reputable databases such as PubMed, MEDLINE, Embase, Web of Science, and Scopus were the focus of our search. Study quality was assessed using a critical evaluation created with the Critical Appraisal Skills Programme tool. Results: The findings are summarized in the ”Results” section that contains descriptive and critical analysis, ramifications, and explanations. According to research, AVNeo improved valve function and had few side effects. Aortic valve neocuspidization has a lower mean pressure gradient and a larger mean efficient orifice area than Trifecta. Aortic valve neocuspidization surgery reduces aortic valve regurgitation and pressure gradients. Postoperative echocardiograms indicated a decrease in peak and a rise in mean pressure gradient. Conclusion: The Ozaki method restores a healthy laminar flow pattern while preventing bivalvular disease. Ozaki procedure should be explored for valve repair in infants with truncal valve and congenital aortic disease. Aortic valve tricuspidization with glutaraldehyde-treated autologous pericardium results in considerable effective orifice area, modest pressure gradients, and little regurgitation.

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“…When everything is working as it should, the annulus of the aortic valve expands during the systolic phase and contracts during the diastolic phase. 21 …”

Section: Discussionmentioning

confidence: 99%

Outcomes of Ozaki Procedure/Aortic Valve Neocuspidization for Aortic Valve Diseases: A Systematic Review

Badalyan

2023

Anatol J Cardiol

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“…The Ozaki procedure involves the replacement of the diseased aortic valve leaflets with autologous or bovine pericardium. Among the advantages is the ability to maximize the valve orifice area—since there is no stented frame involved—and to allow for a large coaptation area ( 37 ). Though introduced in adults, it has a higher rate of use in pediatric patients nowadays, especially in patients who cannot undergo the Ross procedure because of truncus arteriosus or AI with severely dilated aortic annulus ( 38 ).…”

Section: Surgical Management Of Aortic Insufficiencymentioning

confidence: 99%

Treatment options for isolated aortic valve insufficiency: a review

Argaw,

Azizgolshani,

Blitzer

et al. 2024

Front. Cardiovasc. Med.

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Aortic insufficiency (AI) is a valvular disease with increasing prevalence in older patients. The modern era provides numerous options for the management of AI which is explored here. Traditional interventions included aortic valve replacement with either mechanical or bioprosthetic aortic valves. While the former is known for its durability, it has grown out of favor due to the potential complications of anticoagulation. The preference for bioprosthetic valves is thus on the rise, especially with the advancements of transcatheter technology and the use of valve-in-valve therapy. Surgical options are also no longer limited to replacement but include complex techniques such as those required for aortic valve repair, Ozaki neocuspidization, Ross procedure and valve-sparring aortic root repair. Transcatheter options for the management of AI are not commercially available currently; however, preliminary data from ad-hoc trials, showed promising results and potential use of transcatheter technology in a variety of patients with pure AI.

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“…According to the theory of the LBM, the density, momentum, pressure, and shear stress tensor of the blood are governed by Eqs. [2][3][4][5]…”

Section: Description Of the Fsi Approachmentioning

confidence: 99%

“…For instance, Ozaki et al proposed technology that uses autologous pericardium to reconstruct the aortic leaflets (4). Ricciardi et al reported that the aortic valve reconstruction technique could achieve optimal results for younger and less fragile patients (5). Subsequently, Sivalingam et al presented their experience with aortic valve reconstruction of a single leaflet using the aortic valve neocuspidization technique for patients with aortic regurgitation (AR) associated with doubly committed subarterial ventricular septal defects (6).…”

Section: Introductionmentioning

confidence: 99%

Hemodynamic study of the effect of the geometric height of leaflets on the performance of the aortic valve under aortic valve reconstruction

Ma¹,

Gao²,

Tao³

et al. 2022

J Thorac Dis

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Background: Although aortic valve reconstruction has become an alternative treatment for aortic valve disease, the design of the geometric parameters of the reconstructed leaflet still mainly depends on the experience of doctors. The present study investigates the effects of the height of the leaflets on the performance and biomechanical states of the reconstructed aortic valve.Methods: This numerical study was carried out using the finite element approach and the lattice Boltzmann method. The dynamic and biomechanical characteristics of the leaflets were evaluated by using the finite element approach, while the blood flow in the aortic sinus was evaluated by applying the lattice Boltzmann method. Three types of leaflets with different heights were designed. Then the dynamic characteristics, stress distribution, and effective orifice area (EOA) of the aortic valve and flow pattern were calculated as the indicators. Results:The results demonstrated that the height of the leaflets could indeed regulate the performance and the biomechanical states of the aortic valve. The rapid valve opening times of the 3 types of leaflets gradually reduced along with the decrease of the height ratio (HR_0.8: 120 ms vs. HR_1.0: 68 ms vs. HR_1.2: 31 ms), while the rapid valve closing times (RVCTs) of the 3 types of leaflets were similar to each other (approximately 75 ms). Moreover, the radial displacement of the leaflet at the fully open time increased along with the decrease of the HR of the leaflets (HR_0.8: 8 mm vs. HR_1.0: 6 mm vs. HR_1.2: 4 mm). In addition, the stress level of the leaflets also increased with the increase of the height of the leaflets (max stress, HR_0.8: 0.5 MPa, vs. HR_1.0: 1.1 MPa, vs. HR_1.2: 1.8 MPa). Similarly, the low velocity region near the ascending aortic wall and the wall shear stress (WSS) level on the ventricular side of the leaflets also increased along with the increase of the HR of the leaflets. Conclusions:In short, the height of the leaflets mainly affects the opening performance of the reconstructed aortic leaflets. The HR of the reconstructed leaflets for adults should be less than 1.0 to balance the opening and closing performance of aortic leaflets.

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Aortic Valve Reconstruction with Ozaki Technique

Cited by 4 publications

References 7 publications

Outcomes of Ozaki Procedure/Aortic Valve Neocuspidization for Aortic Valve Diseases: A Systematic Review

Outcomes of Ozaki Procedure/Aortic Valve Neocuspidization for Aortic Valve Diseases: A Systematic Review

Treatment options for isolated aortic valve insufficiency: a review

Hemodynamic study of the effect of the geometric height of leaflets on the performance of the aortic valve under aortic valve reconstruction

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