A227 Opening and closing characteristics of stentless mitral valve tested in circulation simulator

Motion and position of both mitral leaflets were studied in five normal dogs 1–11 wk after radiopaque markers were sutured on the valve cusps and on the mitral annulus. Cinefluorograms and cineangiograms (100–120 frames/s) of left atrium and left ventricle were used to study cusp motion and intraventricular flow patterns, and to detect mitral regurgitation during sinus rhythm (42–184 beats/min) and during isolated atrial or ventricular contractions. Time-motion of both leaflets was similar throughout diastole with the exception of delayed posterior cusp opening. Peak opening and closing speeds, opening and closing times, and time of complete closure, measured from the Q wave of the ECG, were not significantly affected by the variations in heart rate. Diastolic leaflet closure began immediately after opening, while the ventricular cavity was small, and was caused by flow eddies behind the cusps. Isolated ventricular contractions closed the valve leaflets completely and symmetric valve closure was ensured by the different rates of leaflet edge approximation. In contrast, atrial closure was slow, partial, and of very short duration.

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Clinical Experience With Stentless Mitral Valve Replacement

The Annals of Thoracic Surgery ◽

10.1016/j.athoracsur.2004.08.027 ◽

2005 ◽

Vol 79 (3) ◽

pp. 772-775 ◽

Cited By ~ 6

Author(s):

Friedrich W. Mohr ◽

Sven Lehmann ◽

Volkmar Falk ◽

Sebastian Metz ◽

Claudia Walther ◽

...

Keyword(s):

Mitral Valve ◽

Valve Replacement ◽

Mitral Valve Replacement ◽

Clinical Experience ◽

Stentless Mitral Valve

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Left ventricular remodeling impacts the function of the Quattro stentless mitral valve bioprosthesis (a 4-year experience)

American Heart Journal ◽

10.1016/j.ahj.2005.08.022 ◽

2006 ◽

Vol 151 (4) ◽

pp. 943.e1-943.e4

Author(s):

Mirko Doss ◽

Tayfun Aybek ◽

Jeffrey Paul Wood ◽

Sven Martens ◽

Gerhard Wimmer-Greinecker ◽

...

Keyword(s):

Mitral Valve ◽

Ventricular Remodeling ◽

Left Ventricular Remodeling ◽

Left Ventricular ◽

Stentless Mitral Valve

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Quadrileaflet Stentless Mitral Valve Replacement

The Thoracic and Cardiovascular Surgeon ◽

10.1055/s-2007-1013174 ◽

1999 ◽

Vol 47 (06) ◽

pp. 357-360 ◽

Cited By ~ 4

Author(s):

T. Walther ◽

C. Walther ◽

V. Falk ◽

G. Langebartels ◽

M. Krüger ◽

...

Keyword(s):

Mitral Valve ◽

Valve Replacement ◽

Mitral Valve Replacement ◽

Stentless Mitral Valve

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Acute in vivo evaluation of a new stentless mitral valve

Journal of Thoracic and Cardiovascular Surgery ◽

10.1016/j.jtcvs.2006.11.044 ◽

2007 ◽

Vol 133 (4) ◽

pp. 986-994.e2 ◽

Cited By ~ 2

Author(s):

Jose L. Navia ◽

Kazuyoshi Doi ◽

Fernando A. Atik ◽

Kiyotaka Fukamachi ◽

Michael W. Kopcak ◽

...

Keyword(s):

Mitral Valve ◽

In Vivo Evaluation ◽

Stentless Mitral Valve

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Stentless mitral valve replacement at five years: Comparison to conventional mitral valve repair or replacement

The Thoracic and Cardiovascular Surgeon ◽

10.1055/s-2004-816692 ◽

2004 ◽

Vol 52 (S 1) ◽

Author(s):

S Lehmann ◽

T Walther ◽

S Metz ◽

V Falk ◽

A Fach ◽

...

Keyword(s):

Mitral Valve ◽

Valve Replacement ◽

Mitral Valve Replacement ◽

Mitral Valve Repair ◽

Valve Repair ◽

Stentless Mitral Valve

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Interactive editing of virtual chordae tendineae for the simulation of the mitral valve in a decision support system

International Journal of Computer Assisted Radiology and Surgery ◽

10.1007/s11548-020-02230-y ◽

2020 ◽

Author(s):

Lars Walczak ◽

Lennart Tautz ◽

Mathias Neugebauer ◽

Joachim Georgii ◽

Isaac Wamala ◽

...

Keyword(s):

Decision Support ◽

Mitral Valve ◽

Decision Support System ◽

Support System ◽

Heuristic Method ◽

Mitral Valve Surgery ◽

Chordae Tendineae ◽

Mitral Valves ◽

Interactive Editing ◽

Opening And Closing

Abstract Purpose Decision support systems for mitral valve disease are an important step toward personalized surgery planning. A simulation of the mitral valve apparatus is required for decision support. Building a model of the chordae tendineae is an essential component of a mitral valve simulation. Due to image quality and artifacts, the chordae tendineae cannot be reliably detected in medical imaging. Methods Using the position-based dynamics framework, we are able to realistically simulate the opening and closing of the mitral valve. Here, we present a heuristic method for building an initial chordae model needed for a successful simulation. In addition to the heuristic, we present an interactive editor to refine the chordae model and to further improve pathology reproduction as well as geometric approximation of the closed valve. Results For evaluation, five mitral valves were reconstructed based on image sequences of patients scheduled for mitral valve surgery. We evaluated the approximation of the closed valves using either just the heuristic chordae model or a manually refined model. Using the manually refined models, prolapse was correctly reproduced in four of the five cases compared to two of the five cases when using the heuristic. In addition, using the editor improved the approximation in four cases. Conclusions Our approach is suitable to create realistically parameterized mitral valve apparatus reconstructions for the simulation of normally and abnormally closing valves in a decision support system.

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Early Clinical Outcome of Mitral Valve Replacement Using a Newly Designed Stentless Mitral Valve for Failure of Initial Mitral Valve Repair

The Heart Surgery Forum ◽

10.1532/hsf.1503 ◽

2016 ◽

Vol 19 (6) ◽

pp. 306 ◽

Cited By ~ 3

Author(s):

Hidefumi Nishida ◽

Hitoshi Kasegawa ◽

Hajime Kin ◽

Shuichiro Takanashi

Keyword(s):

Mitral Valve ◽

Valve Replacement ◽

Mitral Valve Replacement ◽

Mitral Valve Repair ◽

Potential Benefit ◽

Standard Technique ◽

Valve Repair ◽

Early Outcome ◽

Mitral Valve Plasty ◽

Stentless Mitral Valve

Here we report the early outcome of mitral valve replacement using a newly designed stentless mitral valve for failure of initial mitral valve repair. Mitral valve plasty (MVP) for mitral regurgitation is currently a standard technique performed worldwide. However, whether mitral valve repair should be performed for patients with advanced leaflet damage or complicated pathology remains controversial. Mitral valve replacement might be feasible for patients who have undergone failed initial MVP; however, it is not an optimal treatment because of poor valve durability and the need for anticoagulative therapy. We report two cases of successful mitral valve replacement using a newly designed stentless mitral valve made of fresh autologous pericardium, which may have a potential benefit over mitral valve repair or mitral valve replacement with a mechanical or bioprosthetic valve.

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