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[Proceedings: Experimentally induced effects on the plasma renin activity].

In dogs, plasma renin activity (PRA) was increased by anesthesia, by hypercapnia and by extreme hypoxia (paO2 47.6 mm Hg). Relatively moderate hypoxia (paO2 47.6 mm Hg) and artificial respiration had no appreciable influence on PRA. It appears that the sympathomimetic stimulus of CO2 has an important bearing on PRA.