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Non-pulsatile hepatic and portal vein waveforms in patients with liver cirrhosis: concordant and discordant relationships

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

The relationship between hepatic vein waveform and portal vein waveform (HVW and PVW) was evaluated in 54 healthy subjects and 148 patients with liver cirrhosis and portal hypertension using spectral Doppler ultrasound recordings. In all healthy subjects, the HVW was triphasic and the PVW was slightly pulsatile. 51 of 148 patients (34.5%) had flat non pulsatile HVW with a significantly higher incidence in Child C vs Child A patients (48.9% vs 20.7%, respectively; p<0.01) while 56 of 148 patients (37.8%) had flat PVW, also with significantly higher incidence in Child C vs Child A patients (46.7% vs 25.9%, respectively; p<0.05). Of the 86 patients having flat waves (HVW or PVW), only 21 (24.4%) had concordant flat waves (flat both HVW and PVW) while discordance was detected in the remaining 75.6% patients. Only 22 patients (14.9%) had a triphasic HVW but with broad spectrum and absent window in 20 (90.9%) and significantly lower pre-systolic:systolic (PS) ratio (Vmax of the pre-systolic retrograde wave/Vmax of the systolic antegrade wave) compared with healthy subjects (0.23±0.1 vs 0.42±0.18, respectively; p<0.001). In conclusion, spectral broadening with window absence and dampening of the retrograde pre-systolic wave mark are the earliest changes in HVW in cirrhotic patients even in the presence of a triphasic pattern. The transmission of hepatic vein pulsatility is not a major factor responsible for portal vein pulsatility.