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The venous catheter of Cournand and Ranges (1) permits the measurement of pressure and oxygen content of blood in the pulmonary artery, right ventricle, and right auricle of patients with congenital heart disease. To interpret the data so obtained, it is necessary to be cognizant of the variations in these measurements that occur in patients without congenital cardiac defects. The present report deals with the findings in a group of control patients.

the journal of clinical investigation/the journal of clinical investigation

STUDIES OF CONGENITAL HEART DISEASE. II. THE PRESSURE AND OXYGEN CONTENT OF BLOOD IN THE RIGHT AURICLE, RIGHT VENTRICLE, AND PULMONARY ARTERY IN CONTROL PATIENTS, WITH OBSERVATIONS ON THE OXYGEN SATURATION AND SOURCE OF PULMONARY “CAPILLARY” BLOOD 1