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Portal vein pulsatility and spectral width changes in patients with portal hypertension: relation to the severity of liver disease

Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Assiut University, Assiut, Egypt

View larger version (8K): [in a new window]   Figure 1. Simplified representation of a portal vein flow waveform as seen on spectral Doppler display. a, maximum peak velocity at the wave envelope; b, minimum peak velocity; c, minimum velocity at the wave base; w, window area underneath the flow wave.

View larger version (40K): [in a new window]   Figure 2. Portal vein flow waveform in a healthy subject with a pulsatile pattern, narrow spectrum and window area underneath the flow wave.

View larger version (50K): [in a new window]   Figure 3. Portal vein flow wave in a healthy subject with a pulsatile pattern, broad spectrum and absent window.

View larger version (39K): [in a new window]   Figure 4. Portal vein flow wave in a chronic liverdisease patient with almost flat wave envelope (non-pulsatile flow) and absent window. L, liver; A, ascites; GB, gall bladder.