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Hepatopulmonary syndrome.

Victor I Machicao1, Michael B Fallon

  • 1Division of Gastroenterology, Hepatology, and Nutrition, Department of Internal Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77030-1501, USA. victor.i.machicao@uth.tmc.edu

Seminars in Respiratory and Critical Care Medicine
|March 27, 2012
PubMed
Summary
This summary is machine-generated.

Hepatopulmonary syndrome (HPS), a liver disease complication causing low oxygen, affects 30% of cirrhosis patients. Liver transplantation effectively treats HPS, improving gas exchange in most cases.

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Area of Science:

  • Cardiology
  • Pulmonology
  • Hepatology

Background:

  • Hepatopulmonary syndrome (HPS) is a serious complication of liver cirrhosis and portal hypertension.
  • It is characterized by impaired oxygenation due to intrapulmonary vascular dilatation (IPVD).
  • HPS affects 15-30% of cirrhotic patients and is linked to reduced survival.

Purpose of the Study:

  • To define hepatopulmonary syndrome (HPS).
  • To outline the pathogenesis, diagnosis, and treatment of HPS.
  • To highlight the impact of liver transplantation on HPS outcomes.

Main Methods:

  • Diagnosis involves measuring the alveolar-arterial gradient (>15 mm Hg).
  • Pulse oximetry serves as a screening tool.
  • Contrast-enhanced transthoracic echocardiography and radionuclide lung perfusion scans detect IPVD.

Main Results:

  • HPS is defined by an alveolar-arterial gradient > 15 mm Hg.
  • Intrapulmonary vascular dilatation (IPVD), linked to nitric oxide, is the key pathological event.
  • Liver transplantation resolves or improves gas exchange in over 85% of HPS patients.

Conclusions:

  • Hepatopulmonary syndrome is a significant complication of liver disease impacting oxygenation.
  • Effective diagnostic tools include pulse oximetry, echocardiography, and lung scans.
  • Liver transplantation offers a curative treatment for HPS, significantly improving patient outcomes.