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Chapter 18 Annular and Leaflet Shape and Planarity
Department of Cardiothoracic Surgery, Stanford University School of Medicine; Research Institute of the Palo Alto Medical Foundation, Palo Alto, USA.
Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering. Linköping University, Center for Medical Image Science and Visualization (CMIV).ORCID iD: 0000-0001-5526-2399
2016 (English)In: Mitral Valve Mechanics / [ed] Neil B Ingels, Jr and Matts Karlsson, Linköping University Electronic Press, 2016, 18.1-18.3 p.Chapter in book (Other academic)
Abstract [en]

Annular shape change in each heart was quantified by fitting (as described in Appendix C) a best-fit plane to all annulus markers (#15-#30) for each frame (f) during the three consecutive beats studied. The distance (Z) from each annulus marker (m) to this plane in each frame Z(f,m) was then obtained and the standard deviation of Z(f,m) computed for that frame as ZSD(f). This process was repeated for just the contractile annulus markers (#16-#20; #24-#29). A systolic average, Zavg(m), was then obtained for all annulus markers using all frames from mitral valve closing (MVC) to opening (MVO) for all three beats. For each frame, and each marker, the difference Z(f,m)-Zavg(m) was then computed and squared. The square root of the mean of these differences for all markers was then obtained for each frame as Zrms(f).

Place, publisher, year, edition, pages
Linköping University Electronic Press, 2016. 18.1-18.3 p.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:liu:diva-124225DOI: 10.3384/book.diva-117057ISBN: 978-91-7685-952-0 (print)OAI: oai:DiVA.org:liu-124225DiVA: diva2:896834
Available from: 2016-01-22 Created: 2016-01-22 Last updated: 2016-03-14

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