Cited 50 times since 1993 (1.6 per year) source: EuropePMC The American journal of physiology, Volume 264, Issue 6 Pt 2, 1 1 1993, Pages H2198-207 Left ventricular stroke volume by single and dual excitation of conductance catheter in dogs. Steendijk P, Van der Velde ET, Baan J
The conductance method employs a multielectrode catheter to measure intracavitary electric conductance from which left ventricular volume is estimated. A dual-excitation method introduced by us uses a more homogeneous electric field and thereby should enable more accurate volume estimation. In six anesthetized open-chest dogs we compared stroke volume obtained from electromagnetic flow probes with the conventional single-excitation method and with the new dual-excitation conductance method. Caval occlusion and left atrial hemorrhage were used to obtain a wide range of stroke volumes. The slope of the relation between stroke volume calculated from the flow probes and from the conductance catheter increased significantly (P < 0.001) from 0.635 with single excitation to 0.835 with dual excitation, but the interanimal variability was not reduced. The linearity of the relation was substantially improved.
