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  • Title: The immediate pressor response to saralasin: a measure of the degree of angiotensin II vascular receptor vacancy.
    Author: Wallace JM, Case DB, Laragh JH, Sealey JE, Keim HJ, Drayer JI.
    Journal: Trans Assoc Am Physicians; 1977; 90():300-12. PubMed ID: 205983.
    Abstract:
    (1) An immediate pressor response so saralasin, 10 microgram/kg/min, occurred in 52 of 57 (91%) hypertensive patients. (2) We propose that the amplitude of the immediate pressor response functions as an in vivo measure of the number of initially vacan angiotensin II vascular receptors. (3) The immediate pressor response to saralasin forecasts the subsequent sustained response, both of which are related to the renin-sodium profile. (4) The dual blood pressure responses to saralasin, immediate and sustained, make this drug useful for the pharmacological identification of high, normal, and low renin hypertensive patients as they are presently classified. (5) The ability of saralasin to elevate the BP immediately in most hypertensive patients shows the need for caution in its use. It is a safe drug from this standpoint if very small infusions (0.01-0.10 microgram/kg/min) are first tried in hypertensive patients whose PRA is unknown.
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