[Comparison of direct and indirect methods of determining cardiac output].
In anesthetized dogs cardiac output was measured directly (by the method of Fick and by electromagnetic flowmetry) and indirectly (by the method of Bremser-Ranke and by rheography). The measurements were carried out before and after drug tests. The absolute values of cardiac output at rest differed depending on the method used. After the drug test all the methods revealed distinctly changes in cardiac output. A good correlation between flowmetric and rheographic methods was demonstrated. In view of this, they can be recommended to be used in rapidly changing hemodynamic situations. The method of Bremser-Ranke proved more suitable for the processes developing within 30-40 sec.
D000818:Animals; D001811:Blood Volume Determination / Q000379:methods; D002302:Cardiac Output / Q000187:drug effects; D004285:Dogs; D009991:Oscillometry / Q000379:methods; D010992:Plethysmography, Impedance / Q000379:methods; D012212:Rheology
Sravnenie priamykh i kosvennykh metodov opredeleniia serdechnogo vybrosa krovi.