On the Analysis of the Postural Blood Pressure Reflex-An Approach from

X-Ray Study of the Human Heart.

Abstract

The postural blood pressure reflex, or the reflexive restoration of the original blood pressure level after a change of posture from sitting through supine back again to sitting posture, has been proposed by Prof. Hukuda as an index of maintained adjustment of the autonomic nervous system.
Regarding the nature of the temporary fall of the blood pressure directly after the sitting-up, the author followed up roentgenologically the change of various measures on the heart sillouette.
It was revealed then, that the change of the sillouette shape occurred in such a way that the stroke volume of the heart corresponded to the maximal blood pressure in their time course during the period following the posture change of the test