Twenty-four @entity1 with @entity472 and 22 with @entity337 were evaluated using continuous wave Doppler echocardiography (echo). Doppler echo studies were performed 48 hours before cardiac catheterization. Fifteen normal subjects served as controls. Peak velocity in the ascending aorta in @entity472 ranged from 2.0 to 6.0 m/sec with a mean of 3.7 m/sec, and this was significantly increased over the normal controls (mean 1.1 m/sec: 0.7-1.4 m/sec). Using the simplified Bernoulli equation (P = 4 V2, P: peak pressure gradient, V: peak flow velocity), the peak pressure gradient across the aortic valve was measured from the peak velocity in @entity1 with @entity472 . The results (Y) correlated well with the peak-to-peak pressure gradient (X) between the left ventricular pressure and aortic pressure as obtained by cardiac catheterization (Y = 1.1 X +2.5, r = 0.83). @entity337 was detected by continuous wave Doppler echo in all @entity1 with @entity337 , but in only half of the @entity1 the peak velocity could be measured (3.8 +/- 0.3 m/sec, mean +/- SD). In the remaining @entity1 , it was difficult to measure the peak velocity, but it seemed to be greater than 3.0 m/sec. On the simultaneous recordings of the gradient between aortic and left ventricular pressures and continuous wave Doppler echo in @entity1 with @entity337 , the shape and pattern of the pressure gradient during diastole were similar to those of continuous wave Doppler echo. We conclude that continuous wave Doppler echo is a very sensitive method for diagnosing @entity472 and regurgitation, and it provides a quantitative assessment of the severity of @entity472 .

[Continuous wave Doppler echocardiographic assessment of XXXX and @entity337 ].

@entity1 :: ('9606', 'Species') :: ['patients'] @entity472 :: ('MESH:D001024', 'Disease') :: ['aortic stenosis'] @entity337 :: ('MESH:D001022', 'Disease') :: ['Aortic regurgitation', 'aortic regurgitation', 'aortic insufficiency']
@entity472 :: (MESH:D001024,Disease) :: ['aortic stenosis']
