Three-Dimensional Transthoracic Static and Dynamic Normative Values of the Mitral Valve Apparatus: Results from the Multicenter World Alliance Societies of Echocardiography Study - 04/07/22
, Federico M. Asch, MD bAbstract |
Background |
Recent advances in mitral valve (MV) percutaneous interventions have escalated the need for a more quantitative and comprehensive assessment of the MV, which can be best achieved using three-dimensional echocardiography. Understanding normal valve size, structure, and function is essential for differentiation of healthy from disease states. The aims of this study were to establish normative values for MV apparatus size and morphology and to determine how they vary across age, sex, and race groups using data from the World Alliance Societies of Echocardiography Normal Values Study.
Methods |
Three-dimensional volumetric data sets obtained on transthoracic echocardiography in 748 normal subjects (51% men) were analyzed using commercial MV analysis software (TomTec Imaging Systems) to determine annular and leaflet dimensions and areas. The subjects were divided into groups by sex (378 men and 370 women) and age (18 to 40 years [n = 266], 41 to 65 years [n = 249], and >65 years [n = 233]) to identify sex- and age-related differences. In addition, differences among black, white, and Asian populations were studied. Inter- and intraobserver variability was assessed in a subset of 30 subjects and expressed as mean absolute difference between pairs of repeated measurements.
Results |
Compared with women, men had larger annular size measurements, larger tenting size parameters, and larger leaflet length and area. Compared with the black and white populations, the Asian population showed significantly smaller mitral annular size. Although many of the age, sex, and race differences in MV parameters were statistically significant, they were comparable with or smaller than the corresponding measurement variability. Indexing to body surface area and height did not eliminate these differences consistently, suggesting that parameters may need to be indexed according to their dimensionality.
Conclusions |
This analysis of the World Alliance Societies of Echocardiography data provides normative values of mitral apparatus size and morphology. Although sex- and age-related differences were noted, they need to be interpreted with caution in view of the associated measurement variability.
Le texte complet de cet article est disponible en PDF.Highlights |
• | A total of 748 healthy adult subjects were studied. |
• | Normal values of 3D static and dynamic MV parameters were established. |
• | Age, sex, and race affect 3D MV measurements. |
Keywords : Three-dimensional echocardiography, Normal values, Mitral annulus, Mitral leaflets
Abbreviations : 2D, 3D, AL, AP, BSA, LA, LV, MA, MR, MV, NPA, PM, TEE, TTE, WASE
Plan
| Drs. Henry and Cotella contributed equally to this study. |
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| Drs. Lang and Asch contributed equally to this study. |
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| Dr. Henry was funded by a T32 Cardiovascular Sciences Training Grant (5T32HL7381). Mr. Schreckenberg, Mr. Blankenhagen, and Mr. Hitschrich are employees of TomTec Imaging Systems. All authors were involved in the design of the WASE study, patient enrollment, and/or data analysis, and all critically reviewed and approved the final manuscript before submission. A full list of WASE investigators is provided in the Appendix. |
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| Linda D. Gillam, MD, MPH, FASE, served as guest editor for this report. |
Vol 35 - N° 7
P. 738 - juillet 2022 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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