An Autonomic Nervous System Model Applied to
the Analysis of Orthostatic Tests
Figure 1
Bond graph model of
the left ventricle. The calcium concentration variable of the BR model is used
as input to a model of the active mechanical activity, which is described by active and passive capacitive elements implementing (3) and (6), respectively. A 1-junction (7) relates active and passive capacitances. This junction is
linked to a transformer that describes the change of energy domain from
mechanics to hydraulics, as presented in (8).