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Portal Hypertension01:22

Portal Hypertension

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Portal hypertension is an increase in blood pressure within the portal venous system. Normally, this pressure is less than 5 mmHg. It is considered clinically significant when it rises above 10 mmHg. At this threshold, complications from altered blood flow and venous congestion emerge.EtiologyPortal hypertension arises from conditions that impede blood flow through the liver. The most common cause is cirrhosis, in which chronic liver injury leads to fibrotic scarring. This fibrosis narrows or...
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Pulmonary Hypertension: Classification and Pathogenesis01:30

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Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
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Cirrhosis II: Pathophysiology01:24

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Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to...
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Hepatopulmonary syndrome.

David G Koch1, Michael B Fallon

  • 1aDivision of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of South Carolina, Charleston, South Carolina bDivision of Gastroenterology, Hepatology and Nutrition, Department of Internal Medicine, The University of Texas Medical School at Houston, Houston, Texas, USA.

Current Opinion in Gastroenterology
|April 2, 2014
PubMed
Summary
This summary is machine-generated.

Advances in understanding hepatopulmonary syndrome (HPS) pathophysiology and management, especially liver transplantation outcomes, are reviewed. New insights into HPS mechanisms offer potential therapeutic targets.

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Area of Science:

  • Hepatology
  • Pulmonology
  • Transplantation Medicine

Background:

  • Hepatopulmonary syndrome (HPS) is a serious complication of chronic liver disease.
  • Understanding HPS pathophysiology is crucial for improving patient outcomes.

Purpose of the Study:

  • To review recent advances in the pathophysiology of hepatopulmonary syndrome (HPS).
  • To discuss the management of HPS, focusing on liver transplantation.
  • To explore the implications of HPS in liver transplant prioritization and outcomes.

Main Methods:

  • Literature review of experimental and human studies on HPS.
  • Analysis of recent findings on HPS pathophysiology, including molecular and cellular mechanisms.
  • Evaluation of current management strategies and outcomes related to liver transplantation in HPS patients.

Main Results:

  • Significant progress in defining HPS pathophysiology, highlighting roles for endothelin-1, pulmonary monocytes, and angiogenesis.
  • Established implications of HPS for liver transplant patient selection and post-transplant prognosis.
  • Improved understanding of managing HPS, particularly in cases of severe hypoxemia.

Conclusions:

  • Ongoing research continues to elucidate HPS disease mechanisms, identifying potential targets for pharmacologic therapies.
  • Liver transplantation outcomes for HPS patients are becoming better defined.
  • Management strategies for severe hypoxemia in HPS are improving.