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Digital fourier techniques in the diagnosis and quantification of aortic stenosis with pulsed‐Doppler echocardiography
Author(s) -
Can Scott R.,
Richards Kent L.,
Rollwitz William T.
Publication year - 1982
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870100303
Subject(s) - medicine , stenosis , regurgitation (circulation) , cardiology , doppler effect , doppler echocardiography , cardiac catheterization , aortic valve , aortic valve stenosis , radiology , blood pressure , diastole , physics , astronomy
Abstract Pulsed Doppler echocardiography and digital Fourier analysis were utilized to examine flow distal to the aortic valve and to quantify aortic stenosis. A graphic index of parameters derived from velocity spectrum patterns generated by Fourier analysis was regressed against mean systolic pressure gradients in 21 adults with clinical evidence of aortic stenosis who underwent catheterization studies and five normal adults ( r = .82). Correlation improved in the absence of regurgitation ( r = .92). Sensitivity for detecting gradients > 30 mmHg was 86%; specificity was 90%. Doppler spectral analysis shows promise in alleviating the need for many invasive studies.