KAY, C F The validity of the electrokymographic method for measurement of diameter change of the aorta and pulmonary artery during circulatory disturbance. [electronic resource] - The Journal of clinical investigation Mar 1949 - 228-37 p. digital Publication Type: Journal Article ISSN: 0021-9738 Subjects--Topical Terms: AortaElectrokymographyHumansPulmonary Artery