PHYSIOLOGICAL VARIATIONS IN THE CARDIAC OUTPUT OF MAN

Abstract

A study was made of the pulse rate, blood pressure, O consumption, rate of urinary excretion, arterio-venous O difference, and the cardiac output of man after the ingestion of 1000-1500 cc. of water, 1 % NaCl or Locke''s solution. The respiratory metabolism was increased about 8% after the ingestion of water, but not after Locke''s or 1% NaCl solution. The cardiac output rose usually about 10% and more markedly after saline or Locke''s solution than after water. The relation of the above changes to the pulse, blood pressure and rate of diuresis are discussed.