title: Comparison of the cardiac output measurements with electromagnetic flowmeter and dye-dilution technique in dogs, with a note on the comparison between radiocardiography and ear-dye method in man.
abstract: There are relatively few studies and opinions are still divided as to the agreement between the electromagnetic flowmeter and dye-dilution technique in measurements of cardiac output in animals. Of 22 pairs of cardiac output measurements performed with an electromagnetic flow probe applied to the root of aorta in open-chest, anesthetized dogs and with peripheral venous injection of indocyanine green dye and an arterial cuvette, the measured points fell within the range of plus or minus 20% on both sides of the line of identity in 19 instances. Studied on 8 human subjects with radiocardiography and ear-dye method performed simultaneously with peripheral venous injection of a mixture of R131ISA and indocyanine green, cardiac output given by ear-dye method was higher than that given by radiocardiography by an average of 9 plus or minus 11 (SD)%. Agreement and disagreement in cardiac output measurements given by electromagnetic flow probe, dye-dilution method with arterial cuvette, dye-dilution method with ear-piece densitometer and radiocardiography were discussed.
mesh_terms: D000818:Animals; D001794:Blood Pressure; D002302:Cardiac Output; D003720:Densitometry; D004285:Dogs; D004395:Dye Dilution Technique; D004562:Electrocardiography; D055590:Electromagnetic Phenomena; D005263:Femoral Artery; D005268:Femoral Vein; D006325:Heart Atria; D006339:Heart Rate; D006801:Humans; D007208:Indocyanine Green / Q000097:blood; D008722:Methods; D012212:Rheology
chemical_list: D007208:Indocyanine Green