[Plasma renin activity in hypertensive subjects after posture changes and beta receptor blocking]

The Authors have esecuted a study about the manners of the PRA in 20 subjects, 10 hypertensive and 10 sound. The dosages have effected with indirect radioimmunology method and the patterns have proportioned in the mg/ml/h. The results obtained indicate that the situation changes, produce, in hypertensive subjects, increment of the PRA without variations of the pressure and that the block of the Beta receivers produces significant changes of the PRA.