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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