NDLI: Configuration of the mitral valves subvalvular complex and its effect on the chordal force distribution

Content Provider	IEEE Xplore Digital Library
Author	Soerensen, D.D. Christensen, T.B.N. He, Z. He, S. Yoganathan, A.P.
Copyright Year	2002
Description	Author affiliation: Wallace H. Coulter Dept. of Biomed. Eng., Georgia Inst. of Technol., Atlanta, GA, USA (Soerensen, D.D.; Christensen, T.B.N.; He, Z.; He, S.; Yoganathan, A.P.)
Abstract	Three mitral valves (MV) with annulus, leaflets, chordae tendineae (CT) and papillary muscles (PM) were extracted intact from fresh porcine hearts. The valves were inserted in an in vitro left heart simulator that provided physiological flow and transmitral pressures. Four C-shaped chordal force transducers were attached to four chordae tendineae; anterior strut, basal posterior, marginal posterior stem and a commissure. All four chordae originated from the posteromedial papillary muscle. The force transducers measured the force exerted on the four individual chordae during cardiac cycles, under different conditions: two peak transmitral pressures (120 mmHg and 150 mmHg) and three papillary muscle positions (normal, taut and slack). Taut was 5 mm from normal position, and slack 3 mm from normal position. The chordal force distribution changed with papillary muscle displacement. The anterior strut and the basal posterior chordae bore the biggest tension in normal and taut position, whereas the posterior marginal stem bore most of the tension in the slack papillary muscle position. Increasing transmitral pressure increased the magnitude of the chordal forces, but not the force distribution between the chordae.
Starting Page	1246
Ending Page	1247
File Size	238058
Page Count	2
File Format	PDF
ISBN	0780376129
ISSN	1094687X
DOI	10.1109/IEMBS.2002.1106370
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Force measurement Muscles Transducers Heart valves Biomedical measurements Position measurement Helium Boring Displacement measurement Capacitive sensors
Content Type	Text
Resource Type	Article

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