EFFECT OF ALTERATIONS IN POSTURE ON THE INTRA-ARTERIAL BLOOD PRESSURE IN MAN

Abstract

In a previous communication¹we presented data on the behavior of the blood pressure in the carotid artery in man during alterations in posture. Observations were made on a group of subjects with normal circulation and blood pressure, the blood pressure being measured by the use of a simple technic previously described by two of us.²The present study deals with observations on the effects of alteration in posture in persons with certain abnormal conditions. The intracarotid arterial pressure was studied: (1) in a small group of old men with various degrees of hypertension and arteriosclerosis, (2) in a subject undergoing an attack of syncope, and (3) in a group of subjects with normal cardiovascular systems to whom vasodilator drugs were administered. The technic of the experiment has been described in the aforementioned communication. RESULTS 1.Pressure in the Carotid Artery in Persons with Arteriosclerosis(table 1 and