Intravascular Pressure as a Factor Regulating the Tone of the Small Vessels.¹

Abstract

Summary. Observations are described which indicate that the permanent stretching of the vascular smooth muscles, effected by the blood pressure, constitutes a stimulus which elicits increased tone in the small blood vessels. Reduction, respectively elimination of this stimulus is thought to be a major factor in the vasodilatation oc‐curing in the first stage of reactive hyperaemia.