Also, the mean Doppler flow velocity decreased (p less than 0.001) from 3.62 +/- 0.45 to 2.65 +/- 0.53 m/sec following balloon angioplasty of aortic coarctation; this improvement persisted (2.66 ...

Aortic regurgitation occurs when blood flows retrograde (backwards) across the aortic valve from the aorta into ... Color flow Doppler echo permits direct visualization of the regurgitant jet.