NDLI: Effects of a Saddle Shaped Annulus on Mitral Valve Function and Chordal Force Distribution: An In Vitro Study

Content Provider	Springer Nature Link
Author	Jimenez, Jorge Hernan Soerensen, Dennis Dam He, Zhaoming He, Shengqiu Yoganathan, Ajit P.
Copyright Year	2003
Abstract	Studies have concluded that the shape of the human mitral valve annulus is a three-dimensional saddle. The objective of this study was to investigate the effects of a saddle shaped annulus on chordal force distribution and mitral valve function. Eleven human mitral valves were studied in a physiological left heart simulator with a variable shaped annulus (flat versus saddle). Cardiac output and transmitral pressure were analyzed to determine mitral regurgitation volume. In six experiments, force transducers were placed on six chordae tendineae to measure chordal force distribution. Valves were tested in normal and pathophysiologic papillary muscle positions. When comparing the flat and saddle shaped configurations, there was no significant difference in mitral regurgitation volume 11.2% ± 24.7% (p=0.17). In the saddle shaped configuration, the tension on the anterior strut chord was reduced 18.5% #x00B1 16.1% (p < 0.02), the tension on the posterior intermediate chord increased 22.3% #x00B1 17.1% (p < 0.03), and the tension of the commissural chord increased 59.0% #x00B1 32.2% (p < 0.01). Annular shape also altered the tensions on the remaining chords. Annular shape alone does not significantly affect mitral regurgitation caused by papillary muscle displacement. A saddle shaped annulus redistributes the forces on the chords by altering coaptation geometry, leading to an optimally balanced anatomic/physiologic configuration. © 2003 Biomedical Engineering Society. PAC2003: 8719Hh, 8719Uv, 8719Rr
Starting Page	1171
Ending Page	1181
Page Count	11
File Format	PDF
ISSN	00906964
Journal	Annals of Biomedical Engineering
Volume Number	31
Issue Number	10
e-ISSN	15739686
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2003-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biochemistry Mechanics Biophysics/Biomedical Physics Vibration, Dynamical Systems, Control Biomedical Engineering
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

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