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Finite Element analysis for Edge-to-Edge Technique to Treat Post-Mitral Valve Repair Systolic Anterior Motion

Zhong Q., Zeng W., Huang X., Zhao X.

Acta of Bioengineering and Biomechanics

2014

Vol. 16, no. 4

3--12

Systolic anterior motion of the mitral valve is an uncommon complication of mitral valve repair, which requires immediate supplementary surgical action. Edge-to-edge suture is considered as an effective technique to treat post-mitral valve repair systolic anterior motion by clinical researches. However, the fundamentals and quantitative analysis are vacant to validate the effectiveness of the additional edge-to-edge surgery to repair systolic anterior motion. In the present work, finite element models were developed to simulate a specific clinical surgery for patients with posterior leaflet prolapse, so as to analyze the edge-to-edge technique quantificationally. The simulated surgery procedure concluded several actions such as quadrangular resection, mitral annuloplasty and edge-to-edge suture. And the simulated results were compared with echocardiography and measurement data of the patients under the mitral valve surgery, which shows good agreement. The leaflets model with additional edge-to-edge suture has a shorter mismatch length than that of the model merely under quadrangular resection and mitral annuloplasty actions at systole, which assures a better coaptation status. The stress on the leaflets after edge-to-edge suture is lessened as well.

Time resolved PIV and LDA study of the turbulent flow field of bi-Ieaflet mechanical mitral prostheses

Akutsu T., Fukuda T., Sakurai S., Saito J.

Biocybernetics and Biomedical Engineering

2006

Vol. 26, no. 1

53-59

Time Resolved PIV and LDA measurment were conducted for the study of the fIow field generated by the mechanical bi-leafIet mitral valves, the SJM and the Jyros valves, to find out the effect of the valve designs and the installed orientations on the fIow. Results from the time resolved PIV system were very comparable to the LDA results. In both orientations, the JR valve generated much higher turbulent stresses.