A successful global vector field reconstruction from physiological signals is obtained for the
first time. Data are generated by blood pressure and arterial diameter
oscillations by using an arterial catheter with pressure transducer
and an ultrasonic echo-tracking system, respectively. Results
lead to the unambiguous evidence that such biological systems are characterized by a low-dimensional
deterministic dynamical behavior.
It is shown that a physiological system can be modelled from the
knowledge of its behaviour only, as this has yet been done for
theoretical systems and for laboratory designed experiments.