title: Comparison of impedance cardiography and echocardiography for measurement of stroke volume.
abstract: The relationship between stroke volume (SV) measured simultaneously by impedance cardiography (SVI) and echocardiography (SVE) has been analyzed. Change in stroke volume in 6 healthy volunteers was induced by passive head-up tilting (80 degrees) and by oral administration of the sympathomimetic drug amezinium. A correlation of r = 0.83 (p much less than 0.01) was found between SVI and SVE calculated by the equation: SVE = 16.0 + (0.528 x SVI). Though stroke volume is overestimated by impedance cardiography, the method may be useful for the clinical pharmacologist interested in a simple non-invasive tool to estimate stroke volume and change in it.
mesh_terms: D002302:Cardiac Output; D002307:Cardiography, Impedance; D004452:Echocardiography; D006801:Humans; D010992:Plethysmography, Impedance; D013318:Stroke Volume