Vol. 25 No. 4 (2021)
EXPERIMENTAL STUDIES

Aortic root prosthesis with pericardial cusps "Russian conduit": A hydrodynamic experiment

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  • V.V. Bazylev,
  • P.A. Batrakov,
  • D.M. Khadiev,
  • A.A. Egorov,
  • N.A. Eremin
V.V. Bazylev
Federal Center for Cardiovascular Surgery (Penza), Penza
P.A. Batrakov
Federal Center for Cardiovascular Surgery (Penza), Penza
Bio
D.M. Khadiev
Federal Center for Cardiovascular Surgery (Penza), Penza
A.A. Egorov
MedEng, Penza
N.A. Eremin
MedEng, Penza
DOI: https://doi.org/10.21688/1681-3472-2021-4-97-105

Published 2021-12-28

Keywords

  • aortic root,
  • aortic valve,
  • neocuspidisation,
  • pericardium

How to Cite

Bazylev, V., Batrakov, P., Khadiev, D., Egorov, A., & Eremin, N. (2021). Aortic root prosthesis with pericardial cusps "Russian conduit": A hydrodynamic experiment. Patologiya Krovoobrashcheniya I Kardiokhirurgiya, 25(4), 97–105. https://doi.org/10.21688/1681-3472-2021-4-97-105

Copyright (c) 2021 Bazylev V.V., Batrakov P.A., Khadiev D.M., Egorov A.A., Eremin N.A.

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Aim. The study aimed to compare the hydrodynamic characteristics and durability of the aortic root prosthesis with pericardial cusps with various options for the formation of commissures.
Methods. Nine conduits with pericardial valves were formed according to the technique described by Ozaki. The prostheses were divided into 3 groups of 3 specimens each: group 1 — without additional reinforcing seams on the top of the commissure; group 2 — with an additional U-shaped seam without gasket; and group 3 — with an additional suture with an opposite pericardial gasket. The prostheses were fixed on a stand for hydrodynamic testing of artificial heart valves. The hydrodynamic characteristics of the prostheses were evaluated. The hydrodynamics of the frame biological prosthesis was used for comparison. After assessing the hydrodynamic parameters of the aortic root prostheses, their work durability was tested. Defects of the pericardial cusps were studied macroscopically.
Results. Two samples from group 2 were withdrawn from testing ahead of schedule at around 11 × 106 cycles, which is approximately 3.5 months of normal heart function. The other prostheses remained competent and were removed for an examination at 32 × 106 cycles, which is approximately 9.6 months of normal heart function.
Conclusion. The hydrodynamics of the aortic root prosthesis with pericardial valves was comparable to the hydrodynamics of the frame biological prosthesis. Additional U-shaped sutures in the commissure area of the pericardial cusps did not increase the functional durability of the aortic root prosthesis with pericardial leaflets and served as additional risk factors for leaflet perforation. Implantation of pericardial leaflets into a vascular graft resulted in a different distribution of dynamic stress compared to the original aortic valve neocuspidisation, which preserved the aortic root.

Received 8 July 2021. Revised 30 August 2021. Accepted 7 September 2021.

Funding: The study did not have sponsorship.

Conflict of interest: Authors declare no conflict of interest.

Contribution of the authors
Conception and study design: V.V. Bazylev, P.A. Batrakov
Data collection and analysis: P.A. Batrakov, D.M. Khadiev, A.A. Egorov, N.A. Eremin
Drafting the article: P.A. Batrakov
Critical revision of the article: V.V. Bazylev, P.A. Batrakov
Final approval of the version to be published: V.V. Bazylev, P.A. Batrakov, D.M. Khadiev, A.A. Egorov, N.A. Eremin 

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