title: Doppler echocardiographic measurement of cardiac output in man using mitral annulus method.
abstract: The mitral inflow method of measuring cardiac output with pulsed Doppler two-dimensional echocardiography was developed and validated against the thermodilution technique in 42 patients. A mitral inflow method combined the velocity of left ventricular inflow at the mitral annulus (apical long-axis view) with the cross-sectional area of the annulus calculated from its diameter (parasternal long-axis view). A good correlation was observed between thermodilution and Doppler measurements of cardiac output (r = 0.93). The ratio of Doppler measurements to thermodilution measurements will be between 0.76 and 1.15 for about 95% of cases. There was a good correlation between percentage change in thermal cardiac output and those in Doppler cardiac output (r = 0.95); the limits of agreement were -11.5% to 10.5%, suggesting that this method can be most useful for assessing relative changes in cardiac output.
authors.affiliation: Department of Cardiovascular Surgery, National Cardiovascular Center, Fujishirodai, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Shimamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Shimamoto
authors.forename: H
authors.initials: H
authors.lastname: Kito
authors.forename: K
authors.initials: K
authors.lastname: Kawazoe
authors.forename: T
authors.initials: T
authors.lastname: Fujita
authors.forename: M
authors.initials: M
authors.lastname: Okamoto
mesh_terms: D001783:Blood Flow Velocity; D002302:Cardiac Output / Q000502:physiology*; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000000981:diagnostic imaging*