title: Hemodynamics in the portal vein evaluated by pulse wave Doppler ultrasonography in patients with chronic hepatitis C treated with interferon.
abstract: OBJECTIVE
  To employ pulse wave Doppler ultrasonography to evaluate the changes in portal blood flow velocity in patients with chronic hepatitis C (CHC) receiving interferon (IFN) treatment.
  
  
  METHODS
  The subjects in this study were 14 patients (13 men and 1 woman) with CHC who received IFN treatment. Portal blood flow velocity was measured in the vessels at the porta hepatis at four time points: before IFN administration (pre-IFN), 2 wk after the start of administration (wk 2), 24 wk after the start of administration (wk 24, i.e., the end of IFN administration), and 24 wk after the end of administration (wk 48).
  
  
  RESULTS
  The patients with CHC in whom IFN treatment resulted in complete elimination or effective elimination of viruses showed a significant increase in portal blood flow velocity at the end of IFN treatment compared with that before IFN treatment. In contrast, when IFN was ineffective, no significant increase in portal blood flow velocity was observed at wk 24 or 48 compared with the pre-IFN value. In addition, the patients with CHC in whom IFN was ineffective showed significantly lower portal blood flow velocity values than control subjects at all measurement time points.
  
  
  CONCLUSIONS
  Pulse wave Doppler ultrasonography is a noninvasive and easily performed method for evaluating the effects of IFN treatment in patients with CHC. This technique is useful for measuring portal blood flow velocity before and 24 wk after IFN administration in order to evaluate the changes over time, thus assessing the effectiveness of IFN treatment.
authors.affiliation: First Department of Internal Medicine, Mie University School of Medicine, Tsu, Mie 514-8507, Japan.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Nakanishi
authors.forename: Katsuya
authors.initials: K
authors.lastname: Shiraki
authors.forename: Kouji
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Mutsumi
authors.initials: M
authors.lastname: Koyama
authors.forename: Noboru
authors.initials: N
authors.lastname: Kimura
authors.forename: Takeshi
authors.initials: T
authors.lastname: Nakano
mesh_terms: D000328:Adult; D000998:Antiviral Agents / Q000627:therapeutic use*; D001783:Blood Flow Velocity / Q000187:drug effects*; D005260:Female; D019698:Hepatitis C, Chronic / Q000000981:diagnostic imaging / Q000188:drug therapy* / Q000503:physiopathology*; D006801:Humans; D007372:Interferons / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D011169:Portal Vein / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D018617:Ultrasonography, Doppler, Pulsed
chemical_list: D000998:Antiviral Agents; D007372:Interferons