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Normal values of prosthetic valve Doppler echocardiographic parameters: a review
1University of Rochester Medical Center, NY 14642.
Insights
Doppler echocardiography is crucial for assessing prosthetic valves. This review provides reference data on normal flow velocities for various prosthetic valve types and sizes in aortic and mitral positions.
Area of Science:
- Cardiology
- Biomedical Engineering
Background:
- Prosthetic valves require specialized evaluation using Doppler echocardiography.
- Assessing flow velocities in prosthetic valves is complex due to variations in type, position, and size.
- Understanding normal function is vital as prosthetic valves can exhibit stenosis or regurgitation.
Purpose of the Study:
- To compile and present reference data for normal flow velocities in prosthetic valves.
- To aid clinicians in the accurate assessment of prosthetic valve function.
Main Methods:
- Systematic review of 18 studies.
- Inclusion of data from 1105 patients with normally functioning prosthetic valves.
- Analysis of flow velocities across different prosthetic valve types, positions, and sizes.
Main Results:
- Significant differences in flow velocities were observed among various prosthetic valve types and sizes.
- Data was stratified for both aortic and mitral positions.
- Findings are summarized in tables and figures for clinical reference.
Conclusions:
- Reference data for normal prosthetic valve hemodynamics is established.
- The findings facilitate the differentiation of normal function from dysfunction in prosthetic valves.
- Clinical laboratories can utilize this data for improved patient management.
Abstract:
Doppler echocardiography plays an important role in the evaluation of patients with prosthetic valves. The evaluation of flow velocities across prosthetic valves is more complicated compared with native valves, and flow velocities are specific for various types, positions, and sizes of prostheses. Because all prosthetic valves are at least mildly stenotic and a significant proportion is regurgitant, information regarding normally functioning prosthetic valves is important. Eighteen studies resulting in data on 1105 patients with normally functioning prosthetic valves were reviewed. Significant differences among the various types and sizes of prosthetic valves were found in both the aortic and mitral positions. The results are summarized in tables and figures that can be used for reference in a clinical laboratory.