of 27 patients with essential hypertension, the average casual blood preesuro W:IS I95/116 and the average basal pressure was 151/95. The extent to which the relatively variable casual blood pressure rises above the basal pressure may be termed the supplemental pressure, The supplemental pressure is that part of the casual blood pressure thut repsents the response of the cardiovascular system to physical, mental, and emotional stimuli. With rest and habituation to the presence of the observer and his qhygmomanometer, or with sleep, the supplemental pressure falls to, or nearly to, zero. In Egyptian patients with essential hypertension, both the basal and supplemental pressures are elevated. As an average, one-half of the elevation of the casual blood pressure in these cases of essential hypertension is due to elevation of the supplemental pressure, which is of a removable nature and due tu the effect upon a susceptible individual of his physical, mental, and emotional environment. ,\UTHOI:S. M., Amin, M., and Smirk, III. In Renal Hypertension. Brit.
F. EL: Heart
Casual. and Basal Blood Pressures. J. 5: 161,
The difference between the casual and basal blood pressure is less in renal lrypertension than in essential hypertension. The pressure elevation affects the basal blood pressure more than the supplemental pressure. It is likely that the blood vessels in renal hypertension are less reactive to vasomotor impulses than they are in essential hypertension. AUTHORS.
Friedman, Report Med.
M., and Kasanin, of a Case, With 72:
J. S.: Hypertension in Only One of Identical Twins: Consideration of Psychosomatic Factors. Arch. Int.
Only one of a pair of identical twins had hypertension and disease. Determinations of renal blood flow and of glomerular filtration on both the normotensive and hypertensive twin. The renal blood to be similarly reduced in hoth twins. The glomerular filt,ration similar. Electrocardiograms of the patient showed evidence of myocardial tracing made for his brother was normal. The evidence suggests that psychologic factors may lrave been nificanc.e in the production of hypertension in the affected twin.
were l~erformed flow Was found rates also were damage, of
Mayerson, H. S., Long, With Varicose Veins.
C. H., Surgery
and Giles, E. J.: 14:
Pressures in Patients
No difference was observed in the height of the venous pressure in (‘normal ” and in varicosed saphenous veins of standing patients. In both types of veins lhe pressures were usually only slightly higher t,han the hydrostatic pressure. The antecubital and saphenous venous pressures of patients with varicose veins were found to be significantly higher than “normal” when the patients wert: in recumbent position. These high recumbent venous pressures are believed to bc due to an increase in blood volume which enables the individual to compensate for the effects of gravity while standing, but results in an overcompensated state when the recumbent position is assumed.