TY - JOUR
T1 - Nongeometric Doppler stroke volume determination is limited by aortic size
AU - Lloyd, Thomas R.
AU - Shirazi, Farshad
N1 - Funding Information:
From the University Heart Center, Children’s Research Center, and Department of Pediatrics (Cardiology), University of Arizona College of Medicine, Tucson, Arizona 85724. This study was supported in part by a grant-in-aid from the American Heart Association, Arizona Affiliate, Phoenix, Arizona. Manuscript received April 16, 1990; revised manuscript received and accepted May 21, 1990.
PY - 1990/10/1
Y1 - 1990/10/1
N2 - Noninvasive stroke volume determination by Doppler echocardiography has traditionally required estimation both of mean flow rate during ejection by Doppler methods and of flow area by cross-sectional or M-mode echocardiography.1 Spodick and Koito2 recently reported a method for estimating stroke volume from Doppler echocardiographic tracings alone, which they term non-geometric because no area measurement is used. Instead, mean left ventricular ejection rate is estimated from mean Doppler velocity and is then multiplied by Doppler ejection time to yield stroke volume. We reasoned that if there is a physiologic relation between ejection rate and Doppler velocity, truly independent of aortic size, the nongeometric method should also accurately estimate stroke volume in infants and children, who have a wide range of aortic size.
AB - Noninvasive stroke volume determination by Doppler echocardiography has traditionally required estimation both of mean flow rate during ejection by Doppler methods and of flow area by cross-sectional or M-mode echocardiography.1 Spodick and Koito2 recently reported a method for estimating stroke volume from Doppler echocardiographic tracings alone, which they term non-geometric because no area measurement is used. Instead, mean left ventricular ejection rate is estimated from mean Doppler velocity and is then multiplied by Doppler ejection time to yield stroke volume. We reasoned that if there is a physiologic relation between ejection rate and Doppler velocity, truly independent of aortic size, the nongeometric method should also accurately estimate stroke volume in infants and children, who have a wide range of aortic size.
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U2 - 10.1016/0002-9149(90)90377-D
DO - 10.1016/0002-9149(90)90377-D
M3 - Article
C2 - 2220595
AN - SCOPUS:0025169620
SN - 0002-9149
VL - 66
SP - 883
EP - 884
JO - The American Journal of Cardiology
JF - The American Journal of Cardiology
IS - 10
ER -