Related Experiment Video
Updated: Jun 27, 2025
06:51
Author Spotlight: Development of a Minimally Invasive Large-Animal Model for Reliable and Reproducible Cardiovascular Research
Published on: October 20, 2023
1.0K
Examining the typical hemodynamic performance of nearly 3000 modern surgical aortic bioprostheses
Robert J M Klautz1, Vivek Rao2, Michael J Reardon3
1Department of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, Netherlands.
Summary
Surgical aortic valve replacement shows good to excellent hemodynamic performance at one year. This analysis of contemporary tissue valves provides a benchmark for future bioprosthetic valve studies.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Clinical Echocardiography
Background:
- Pooled data from 4 multicenter studies (NCT02088554, NCT02701283, NCT01586910, NCT01531374).
- Analysis focused on contemporary surgical aortic valves.
- Included patients with significant valvular dysfunction.
Purpose of the Study:
- Assess the 1-year hemodynamic performance of modern surgical aortic valves.
- Provide data to inform valve selection and patient management.
- Establish a benchmark for evaluating bioprosthetic surgical valves.
Main Methods:
- Echocardiograms analyzed by a single core laboratory.
- Evaluated effective orifice area, dimensionless velocity index, mean aortic gradient, peak aortic velocity, and stroke volume.
- Included 2938 patients with 10 tissue valve models.
Main Results:
- At 1 year, effective orifice area ranged from 1.46–2.12 cm².
- Dimensionless velocity index ranged from 0.39–0.56.
- Mean gradient ranged from 8.6–16.1 mmHg; peak velocity 1.96–2.65 m/s; stroke volume 75.3–89.8 ml.
Conclusions:
- The pooled cohort represents the largest analysis of contemporary surgical aortic valves with single core lab echocardiogram assessment.
- Overall hemodynamic performance at 1 year was good to excellent.
- Data can serve as a benchmark for evaluating bioprosthetic surgical valve performance.
