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Measurement of cardiac output by carbon dioxide rebreathing. 1979

R D Wigle, and P D Hamilton, and J O Parker

Twenty patients were studied on a bicycle ergometer at rest and at varying workloads to compare methods of measuring cardiac output. In nine patients, a comparison of carbon dioxide rebreathing and dye dilution techniques for measuring cardiac output were made. In eleven patients, comparisons between carbon dioxide rebreathing, dye dilution, and direct oxygen Fick techniques were made. The cardiac output measured by carbon dioxide rebreathing was reproducible and compared well with both the dye dilution and direct oxygen Fick. The correlation coefficient for the relationship between carbon dioxide rebreathing and direct oxygen Fick cardiac outputs was 0.80 and between carbon dioxide rebreathing and dye dilution cardiac outputs was 0.75. The relationship between dye dilution and direct oxygen Fick cardiac output was 0.71. The carbon dioxide rebreathing technique is a safe, non-invasive and reproducible method to measure cardiac output. The results compare well with the cardiac output measured by either the direct oxygen Fick or dye dilution technique.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D002245 Carbon Dioxide A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals. Carbonic Anhydride,Anhydride, Carbonic,Dioxide, Carbon
D002302 Cardiac Output The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat). Cardiac Outputs,Output, Cardiac,Outputs, Cardiac
D004395 Dye Dilution Technique Method for assessing flow through a system by injection of a known quantity of dye into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed) Dye Dilution Technic,Dilution Technic, Dye,Dilution Technics, Dye,Dilution Technique, Dye,Dilution Techniques, Dye,Dye Dilution Technics,Dye Dilution Techniques,Technic, Dye Dilution,Technics, Dye Dilution,Technique, Dye Dilution,Techniques, Dye Dilution
D005082 Physical Exertion Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included. Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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