Influence of tetraethylammonium ion on the effects of effects of adrenaline and acetylcholine on pulmonary pulmonary circulation

Abstract

The influence of adrenaline and acetylcholine on pulmonary circulation is being studied in normal animals with spontaneous respiration, comparatively before and after injecting tetraetylamonium.

From the results it has been deducted that in the effects of adrenaline on pulmonary circulation the vasoconstrictor action plays a secondary part and that there predominate the consequences of the variations of cardiac activity which modify the degree of repletion of the pulmonary system. It is shown that acetylcholine shows a pressure effect in the pulmonary artery and the conclusion is come to. that this effect corresponds to a raising of the peripheric resistance. probably of extravascular origin.