EFFECT OF POSTURE ON CARDIAC OUTPUT

Abstract

The cardiac output was 5-36% less in the quiet standing than in the basal recumbent position when detd. by either the original Grollman acetylene method or by the modified method of Gladstone. Both methods gave comparable results in the recumbent position but values as detd. by the original Grollman method were shown to be erroneously low in the standing position because of recirculation occurring during the rebreathing procedure (at about 10 sec.). The modified Gladstone method gave valid results in either position.