| Autor: |
Hansen, W.H., Behrenbeck, T., Spittell, P.C., Gilman, G., Seward, J.B. |
| Zdroj: |
Journal of the American Society of Echocardiography; August 2005, Vol. 18 Issue: 8 p860-864, 5p |
| Abstrakt: |
A total of 59 patients (>= 65 years of age) with normal left ventricular function (ejection fraction > 50%) and varying degrees of aortic valve structure and hemodynamics (normal to severely stenotic) were screened; 50 were subsequently enrolled. Continuous wave Doppler echocardiography in the descending thoracic aorta showed two general patterns: (1) in aortic stenosis, the pattern consisted of two peak systolic velocity components (S"1 and S"2); and (2) in normal aortic valve function, the pattern was a uniphasic signal with a single peak systolic velocity component. The new Doppler pattern yielded 95% sensitivity and 90% specificity in the detection of clinically significant aortic valve stenosis, and 92% sensitivity and 70% specificity in the detection of severe aortic valve stenosis. Sensitivity was 96% in uniphasic signals during normal aortic valve function by conventional 2-dimensional and Doppler criteria. This article introduces characteristics of this Doppler velocity profile as a new diagnostic finding of aortic valve stenosis. |
| Databáze: |
Supplemental Index |
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