As a guest user you are not logged in or recognized by your IP address. You have
access to the Front Matter, Abstracts, Author Index, Subject Index and the full
text of Open Access publications.
A computer model for the circulation was developed that takes gravitational effects into account. Gravity was supposed to act on the filling of the left and right atrium and the hydrostatic distance between heart and baroreceptors. The model is based on difference equations describing essential conditions of the circulation, like heart period, systolic pressure or stroke volume, on a beat-to-beat basis. It was possible in this model to simulate the cardiovascular dynamics after a passive tilt from upright to supine, assuming only baroreflex control. However, the dynamic behaviour after a tilt from supine to upright was only wellsimulated when low-pressure baroreceptors (in the atria) were incorporated in the model as well. Depending on the parameter settings of the model sustained 0.1 Hz oscillations in heart rate and blood pressure showed up in the upright situation, due to non-linearities in the model and sympathetic feedback reaction times.
This website uses cookies
We use cookies to provide you with the best possible experience. They also allow us to analyze user behavior in order to constantly improve the website for you. Info about the privacy policy of IOS Press.
This website uses cookies
We use cookies to provide you with the best possible experience. They also allow us to analyze user behavior in order to constantly improve the website for you. Info about the privacy policy of IOS Press.