Biomedical Engineering Reference
In-Depth Information
Fig. 7.40  Maximum transmitral velocity of left atrium models: C A , C B and C C during diastole
Figure 7.41 shows flow entering the right atrium chamber through the shows the
streamlines from the left inferior pulmonary valve and the right superior pulmo-
nary valve for the three models: C A , C B , C C at their respective maximum velocity.
The shortest atrial transit time for blood originating in the left inferior pulmonary
valve, was found for model- C A . For model- C C the distance from the left inferior
pulmonary valve to the mitral valve is exactly the same as for C A , but the average
transit time was higher. This is because the left and right jets collide with each other
in model- C C and induce a recirculating motion towards the upper part of the left
atrium. In model- C B , some of the streamlines go directly to the septal side of the
mitral opening, while another portion turn into a swirling motion towards and also
into the left atrium appendage.
In model- C C , the right jets collide with the jets from the left pulmonary valves
and change direction completely. Whereas a large part of the flow from the left
inferior pulmonary valve was forced into a swirling motion, the jet from the right
superior pulmonary valve turns directly towards the septal side of the mitral valve.
For model- C B , the streamlines originating in the RSPV are similar to the streamlines
origination in the left inferior pulmonary valve, but the number of streamlines hav-
ing a direct path towards the mitral valve is less.
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