| Autor: |
Bengur, A.Resai, Snider, A.Rebecca, Meliones, Jon N., Vermilion, Roger P. |
| Zdroj: |
Journal of the American College of Cardiology; November 1991, Vol. 18 Issue: 6 p1499-1505, 7p |
| Abstrakt: |
To evaluate the usefulness of the Doppler-derived aortic valve area calculated from the continuity equation in assessing the hemodynamic severity of aortic valve stenosis in infants and children, two-dimensional and Doppler echocardiographic examinations were performed on 42 patients (aged 1 day to 24 years) a median of 1 day before or after cardiac catheterization. The left ventricular outflow tract diameter was measured from the parasternal long-axis view at the base of the aortic cusps from inner edge to inner edge in early systole. The flow velocities proximal to the aortic valve were measured from the apical view with use of pulsed Doppler echocardiography; the jet velocities were recorded from the apical, right parasternal and suprasternal views by using continuous wave Doppler echocardiography. The velocity-time integral, mean velocity and peak velocity were measured by tracing the Doppler waveforms along their outermost margins. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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