[Analysis of the structure of the rheoencephalogram as a biosignal of pulsatile blood-filling].

In connection with an elaboration of a new method of analysing biosignals of pulse repletion, which used a systemic approach to the description of the cardiovascular system and a creation of a corresponding model of its work, the authors made a theoretical study of systematization of the manifold forms of rheograms in different conditions of the vascular tone. An analysis of the rheogram structures on the basis of the model of the cardiovascular system and a consideration of the rheograms as a summation of two components -- the arterial and venous -- permitted to eliminate some new indices of the tone state, elasticity and blood repletion of the arterial and venous bed, as well as the amount of peripheral vascular resistance.