Mitral valve edge-to-edge repair (ETER) alters valve mechanics, which may impact efficacy and durability of the repair. The objective of this paper was to quantify stretches in the central region of the anterior leaflet of the mitral valve after ETER with a single suture and 6 mm suture. Sixteen markers, forming a array, were attached onto the central region of the mitral valve anterior leaflet. The mitral valve was subjected to ETER with a single suture and 6 mm suture, and mounted in an in vitro flow loop simulating physiological conditions. Images of the marker array were used to calculate marker displacement and stretch. A total of 9 mitral valves were tested. Two peak stretches were observed during a cardiac cycle, one in systole and the other in diastole under mitral valve edge-to-edge repair condition. The major principal (radial) stretch during systole was significantly greater than that during diastole. However, there was no significant difference between the minor principal (circumferential) stretch during diastole and that during systole. In addition, there were no significant differences in the radial and circumferential, or areal stretches and stretch rates during diastole between the single suture and 6 mm suture. The ETER subjects the mitral valve leaflets to double frequency of loading and unloading. Minor change in suture length may not result in a significant load difference in the central region of the anterior leaflet during diastole.
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November 2009
Research Papers
In Vitro Stretches of the Mitral Valve Anterior Leaflet Under Edge-to-Edge Repair Condition
Zhaoming He,
Zhaoming He
Department of Mechanical Engineering,
e-mail: zhaoming.he@ttu.edu
Texas Tech University
, Lubbock, TX 79409-1021
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Bo Gao,
Bo Gao
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
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Shamik Bhattacharya,
Shamik Bhattacharya
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
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Tyler Harrist,
Tyler Harrist
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
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Sibi Mathew,
Sibi Mathew
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
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Wei Sun
Wei Sun
Department of Mechanical Engineering, and Department of Biomedical Engineering,
University of Connecticut
, Storrs, CT 06269-3139
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Zhaoming He
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021e-mail: zhaoming.he@ttu.edu
Bo Gao
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
Shamik Bhattacharya
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
Tyler Harrist
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
Sibi Mathew
Department of Mechanical Engineering,
Texas Tech University
, Lubbock, TX 79409-1021
Wei Sun
Department of Mechanical Engineering, and Department of Biomedical Engineering,
University of Connecticut
, Storrs, CT 06269-3139J Biomech Eng. Nov 2009, 131(11): 111012 (5 pages)
Published Online: October 26, 2009
Article history
Received:
November 5, 2008
Revised:
June 3, 2009
Posted:
September 1, 2009
Published:
October 26, 2009
Citation
He, Z., Gao, B., Bhattacharya, S., Harrist, T., Mathew, S., and Sun, W. (October 26, 2009). "In Vitro Stretches of the Mitral Valve Anterior Leaflet Under Edge-to-Edge Repair Condition." ASME. J Biomech Eng. November 2009; 131(11): 111012. https://doi.org/10.1115/1.4000111
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