title: Hepatic venous pressure gradients measured by duplex ultrasound.
abstract: OBJECTIVE
  The hepatic venous pressure gradient is a major prognostic factor in portal hypertension but its measurement is complex and requires invasive angiography. This study investigated the relationship between the hepatic venous pressure gradient and a number of Doppler measurements, including the arterial acceleration index.
  
  
  METHODS
  We measured the hepatic venous pressure gradient in 50 fasting patients at hepatic venography. Immediately afterwards, a duplex sonographic examination of the liver was performed at which multiple measurements and indices of the venous and arterial hepatic vasculature were made.
  
  
  RESULTS
  Hepatic arterial acceleration was correlated directly with the hepatic venous pressure gradient (r=0.83, P<0.0001) and with the Child-Pugh score (r=0.63, P<0.0001). An acceleration index cut-off value of 1m.s(-2) provided a positive predictive value of 95%, a sensitivity of 65% and a specificity of 95% for detecting patients with severe portal hypertension (hepatic venous pressure gradient>12 mmHg). A correlation between the hepatic venous pressure gradient and the congestion index of the portal vein velocity (r=0.45,P=0.01) and portal vein velocity (r=0.40,P=0.044), was also noted.
  
  
  CONCLUSIONS
  Measuring the hepatic arterial acceleration index may help in the non-invasive evaluation of portal hypertension.
authors.affiliation: Department of Radiology, Bicêtre Hospital, Le Kremlin-Bicêtre, France. jean-pierre.tasu@bct.ap-hop-paris.fr
authors.forename: J-P
authors.initials: JP
authors.lastname: Tasu
authors.forename: L
authors.initials: L
authors.lastname: Rocher
authors.forename: G
authors.initials: G
authors.lastname: PEletier
authors.forename: V
authors.initials: V
authors.lastname: Kuoch
authors.forename: E
authors.initials: E
authors.lastname: Kulh
authors.forename: A
authors.initials: A
authors.lastname: Miquel
authors.forename: C
authors.initials: C
authors.lastname: Buffet
authors.forename: M
authors.initials: M
authors.lastname: BlEry
mesh_terms: D000328:Adult; D000368:Aged; D001783:Blood Flow Velocity; D005260:Female; D006439:Hemodynamics; D006499:Hepatic Artery / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D006975:Hypertension, Portal / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D017082:Portal Pressure; D011237:Predictive Value of Tests; D012680:Sensitivity and Specificity; D018616:Ultrasonography, Doppler, Duplex