Keywords:
Cardiac, Molecular imaging, Ultrasound physics, Echocardiography, Echocardiography (transoesophageal), MR, Computer Applications-3D, History, Imaging sequences, Image verification, Pathology, Patterns of Care
Authors:
M. Karvandi, S. Ranjbar, S. A. Hassantash, M. Foroughi; Tehran/IR
Results
Ranjbar S.
Karvandi M.
(2013) recently developed the first novel left ventricular myocardial model mathematically based on echocardiography,
by MATLAB software and LSDYNA software in normal subjects which dynamic orientation contraction (through the cardiac cycle) of every individual myocardial fiber could be created by adding together the sequential steps of the multiple fragmented sectors of that fiber.
The left ventricular myocardial modeling of the heart shows that in normal cases myocardial fibers initiate from the posterior-basal region of the heart,
continues through the left ventricular free wall,
reaches the septum,
loops around the apex,
ascends,
and ends at the superior-anterior edge of left ventricle.
This approach could overcome the limitations of previously proposed models and give new insight into the complex mitral valve function.
This approach shows the effect of fiber formation on left ventricular myocardium and mitral valve efficiency.
Preliminary results concerning a different aspect of MVL biomechanics,
such as leaflets dynamics,
displacements/velocities and strain rates/strains of points on leaflets,
were in good agreement with in echocardiographic observations.
Quantitative information on MVL and dynamics can be extracted from equations of inelasticity,
when performed in multiple TTE and TEE planes.
These data potentially allow the implementation of an image-based approach for patient-specific modeling of MVL.
This advance could overcome the limitations of previously proposed models and give new insight into the complex MV function.
This approach could constitute the basis for accurate evaluation of MV pathologic conditions and for the planning of surgical procedures.
Figures 10 to 16 show blood flow directions around the mitral valve leaflets by our new 3D assessment of the mitral valve.