Echocardiographic Estimation of Aortic-Valve Gradient in Aortic Stenosis
- 1 September 1978
- journal article
- research article
- Published by American College of Physicians in Annals of Internal Medicine
- Vol. 89 (3), 329-335
- https://doi.org/10.7326/0003-4819-89-3-329
Abstract
Patients (55) with aortic stenosis underwent echocardiography at the time of cardiac catheterization. Left ventricular systolic pressure was estimated from the echocardiogram assuming that peak systolic circumferential wall stress was constant. Systolic blood pressure was subtracted from the estimated left ventricular pressure to obtain the aortic-valve gradient. Of 44 patients with adequate echocardiograms and catheterization studies, 30 had their aortic gradient accurately estimated by the echocardiogram (r = 0.75). All 30 patients had normal left ventricular systolic function estimated echocardiographically. The echocardiogram underestimated the aortic gradient in all 7 patients with poor left ventricular systolic function. An accurate echocardiographic estimate of aortic-valve gradient can be obtained in patients with normal left ventricular function. The technique can identify those patients with insignificant left ventrivular outflow obstruction, obviating the need for invasive studies.This publication has 2 references indexed in Scilit:
- Electrocardiographic manifestations of ventricular hypertrophy; a computer study of ECG-anatomic correlations in 319 casesAmerican Heart Journal, 1964
- An Angiocardiographic Analysis of the Thickness of the Left Ventricular Wall and Cavity in Aortic Stenosis and Other Valvular LesionsCirculation, 1963