[Determination of cardiac output using impedance-cardiography in comparison with conventional methods during rest and under pharmacological stress].
A recording of the changes in the transthoracic resistance as a function of the cardiac cycle enables--in connection with the ejection time--a non-invasive determination of the cardiac output (impedance cardiography). On volunteers without heart diseases the cardiac output according to the Fick principle, the impedance-cardiographic and sphygmographic method at rest and under pharmacological influence is synchronously measured and statistically compared with the found cardiac output according to Fick. Especially under pharmacological influence the impedance-cardiographically determined values do not show a sufficient correlation. The range of error, is causes as well as the limited possibility of application of the method are being discussed.
D002302:Cardiac Output / Q000187:drug effects*; D002306:Cardiac Volume / Q000187:drug effects; D006321:Heart / Q000502:physiology; D006334:Heart Function Tests / Q000379:methods*; D006801:Humans; D009638:Norepinephrine / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D012146:Rest; D013806:Theophylline / Q000494:pharmacology
D011433:Propranolol; D013806:Theophylline; D009638:Norepinephrine
Die Bestimmung des Herzzeitvolumens mit der Impedanzkardiographie im Vergleich zu konventionellen Methoden in Ruhe und unter pharmakologischer Belastung