title: Use of pulsed-wave Doppler echocardiography to determine aortic and pulmonary velocity and flow variables in clinically normal dogs.
abstract: Transcutaneous pulsed-wave Doppler echocardiography was used to obtain velocity signals from the aortic and pulmonary roots of clinically normal adult dogs tranquilized with acepromazine. Doppler-derived variables included peak ejection velocity, ejection time, and velocity-time integral. The cross-sectional areas of the left and right ventricular outflow tracts were estimated from diameters of the respective orifices measured from two-dimensional echocardiographic images. These data were used to calculate stroke volume and cardiac output for each ventricle. Linear, single variable regressions of ejection time, velocity-time integral, and peak velocity with body weight showed no significant correlations. Significant correlations existed between body weight and estimated left and right ventricular stroke volume and cardiac output. A close correspondence existed between pulmonary and aortic determinations of velocity-time integral, stroke volume, and cardiac output. These results provide an initial framework for interpretation of clinical data by veterinary cardiologists.
authors.affiliation: Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor 48109.
authors.forename: D J
authors.initials: DJ
authors.lastname: Brown
authors.forename: D H
authors.initials: DH
authors.lastname: Knight
authors.forename: R R
authors.initials: RR
authors.lastname: King
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000000981:diagnostic imaging / Q000502:physiology*; D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging / Q000662:veterinary; D001783:Blood Flow Velocity / Q000662:veterinary; D002302:Cardiac Output; D004283:Dog Diseases / Q000000981:diagnostic imaging; D004285:Dogs / Q000502:physiology*; D015150:Echocardiography, Doppler / Q000662:veterinary*; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D008297:Male; D011664:Pulmonary Valve / Q000000981:diagnostic imaging / Q000502:physiology*; D011665:Pulmonary Valve Insufficiency / Q000000981:diagnostic imaging / Q000662:veterinary; D012016:Reference Values; D013318:Stroke Volume; D016276:Ventricular Function