Environmental Engineering Reference
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Fig. 6
Comparison of
ejection fraction evolution
for three different Purkinje
models, with ST1
LV Ejection Fraction ST1 Fiber Model
120
100
80
60
40
Pk1: 72.03 %
Pk2: 72.75 %
Pk3: 71.73 %
20
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
t (ms)
RV Ejection Fraction ST1 Fiber Model
120
100
80
60
40
Pk1: 54.63 %
Pk2: 54.2 %
Pk3: 46.77 %
20
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
t (ms)
sor Imaging, DTI) is also used and compared with the synthetic ones. The different
activation protocols (Pk1, Pk2,…, Pk14) are obtained by changing distributions of
the Purkinje end points, including cases of impaired hearts.
To perform the simulations, the rabbit ventricular geometry developed by Bishop
et al. (
2010
) the University of Oxford is used. The model represents the ventricles of
the heart and does not include valves, great vessels, pericardium and organs around
the heart. The geometry consists of 432,000 linear tetrahedra and 82,619 nodes with
a resolution of 0.05 cm (see Fig.
5
).
4.1.1 Results
The ejection fraction has been calculated for each combination of Purkinje sys-
tem and fiber field and by sweeping the parameter
ʳ
in Eq. (
5
), which controls the
active stress intensity. First, by fixing
, the ejection fraction is measured for several
configurations. An example of the results obtained is shown in Fig.
6
. It is observed
ʳ
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