title: Hepatopulmonary syndrome in poorly compensated postnecrotic liver cirrhosis by hepatitis B virus in Korea.
abstract: BACKGROUND
  Hepatopulmonary syndrome (HPS) refers to the association of hypoxemia, intrapulmonary shunting and chronic liver disease. But there is no clear data about the prevalence of HPS in postnecrotic liver cirrhosis by hepatitis B virus (HBV), the most common cause of liver disease in Korea. The aim of this study was to investigate the prevalence of HPS in poorly compensated postnecrotic liver cirrhosis by HBV, and the correlation of the hepatopulmonary syndrome with clinical aspects of postnecrotic liver cirrhosis by HBV.
  
  
  METHODS
  Thirty-five patients underwent pulmonary function test, arterial blood gas analysis and contrast-enhanced echocardiography. All patients were diagnosed as HBV-induced Child class C liver cirrhosis and had no evidence of intrinsic cardiopulmonary disease.
  
  
  RESULTS
  Intrapulmonary shunt was detected in 6/35 (17.1%) by contrast-enhanced echocardiography. Two of six patients with intrahepatic shunts had significant hypoxemia (PaO2 < 70 mmHg) and four showed increased alveolar-arterial oxygen gradient over 20 mmHg. Only cyanosis could reliably distinguish between shunt positive and negative patients.
  
  
  CONCLUSIONS
  The prevalence of intrapulmonary shunt in poorly compensated postnecrotic liver cirrhosis by HBV was 17.1% and the frequency of hepatopulmonary syndrome was relatively low (5.7%). 'Subclinical' hepatopulmonary syndrome (echocardiographically positive intrapulmonary shunt but without profound hypoxemia) exists in 11.4% of cases with poorly compensated postnecrotic liver cirrhosis by HBV. Cyanosis is the only reliable clinical indicator of HPS of HBV-induced poorly compensated liver cirrhosis. Further studies are required to determine if the prevalence and clinical manifestations of HPS varies with etiology or with geographical and racial differences.
authors.affiliation: Department of Internal Medicine, Liver Research Institute, Seoul Municipal Boramae Hospital, Seoul, Korea.
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: D H
authors.initials: DH
authors.lastname: Lee
authors.forename: J H
authors.initials: JH
authors.lastname: Zo
authors.forename: T H
authors.initials: TH
authors.lastname: Kim
authors.forename: K L
authors.initials: KL
authors.lastname: Lee
authors.forename: H S
authors.initials: HS
authors.lastname: Chung
authors.forename: C H
authors.initials: CH
authors.lastname: Kim
authors.forename: S K
authors.initials: SK
authors.lastname: Han
authors.forename: Y S
authors.initials: YS
authors.lastname: Sim
authors.forename: H S
authors.initials: HS
authors.lastname: Lee
authors.forename: Y B
authors.initials: YB
authors.lastname: Yoon
authors.forename: I S
authors.initials: IS
authors.lastname: Song
authors.forename: C Y
authors.initials: CY
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D015897:Comorbidity; D005260:Female; D006509:Hepatitis B / Q000175:diagnosis / Q000453:epidemiology*; D020065:Hepatopulmonary Syndrome / Q000175:diagnosis / Q000453:epidemiology*; D006801:Humans; D007723:Korea / Q000453:epidemiology; D008103:Liver Cirrhosis / Q000145:classification / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D009336:Necrosis; D015995:Prevalence; D011336:Probability; D012129:Respiratory Function Tests; D018570:Risk Assessment