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| The measurement of cardiac output in dogs by impedance cardiography with differentelectrode arrangements. A Adamicza, L Tutsek, B Daróczy, F Bari, S Nagy Acta Physiol Hung 1994; 82(1):37-52 ICID: 167248 |
| IC™ Value: 5.00 |
| This study was performed to compare cardiac output (CO) values determinedby means of impedance cardiography (ICG) with the conventional four-band electrode array and with differentspot electrode arrays in anaesthetised dogs. CO values determined at end-expiratory apnoea with hand-calculation(ICG1) and during several respiratory cycles with a computer program (ICG2) were compared with valuesobtained via simultaneous thermodilution (TD) measurements. Changes in CO during isoproterenol infusion,bleeding and reinfusion were also studied by means of ICG1, using one of the spot electrode arrays andTD. Band voltage electrodes yielded a significantly lower CO, whereas spot electrodes on the left thoraxgave a significantly higher CO than that measured with TD. In spite of the high correlation coefficientsin the different electrodes arrays, the bias between ICG1 and TD, and that between ICG2 and TD CO inthe SL1-SL8 and BN-BX electrode arrays showed differences statistically significant from zero. The percentagechanges in CO measured with ICG1 in the SN-SX electrode array and TD during isoproterenol infusion, bleedingand reinfusion also showed a high correlation. These results indicate that band voltage electrodes canbe replaced by the more convenient spot electrodes in certain arrays. Further CO may be measured duringseveral respiratory cycles by using a computer program. Thus, ICG is a reproducible, non-invasive methodfor the measurement of CO in anaesthetised dogs. |
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ICID 167248 PMID 7976395 - click here to show this article in PubMed database |
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