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Related Concept Videos

Hepatic Encephalopathy01:29

Hepatic Encephalopathy

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DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic...
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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

Pulmonary Hypertension: Classification and Pathogenesis

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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.
There are various classifications for PH, each relating to different underlying causes and also...
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Pneumonia II: Pathophysiology01:29

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The pathophysiology of pneumonia involves the following steps:
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Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

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Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:
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Cirrhosis II: Pathophysiology01:24

Cirrhosis II: Pathophysiology

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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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Related Experiment Video

Updated: Apr 23, 2026

Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats
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Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats

Published on: August 1, 2018

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[Hepatopulmonary syndrome].

Olli Säynäjäkangas, Ulpu Tervashonka, Annika Olli

    Duodecim; Laaketieteellinen Aikakauskirja
    |October 2, 2014
    PubMed
    Summary

    Hepatopulmonary syndrome (HPS) involves liver disease, lung vascular changes, and low oxygen. Diagnosis requires confirming liver issues, hypoxemia, and shunts, with liver transplantation as the sole effective treatment.

    Area of Science:

    • Cardiology
    • Pulmonology
    • Hepatology

    Background:

    • Hepatopulmonary syndrome (HPS) is a serious complication of chronic liver disease.
    • It presents with intrapulmonary vascular dilatation and arterial deoxygenation.
    • Key mediators include tumor necrosis factor-alpha, endothelin-1, and nitric oxide.

    Purpose of the Study:

    • To define the characteristics and diagnostic criteria for hepatopulmonary syndrome.
    • To outline the underlying pathophysiological mechanisms.
    • To identify current therapeutic options for HPS.

    Main Methods:

    • Diagnosis is established by identifying liver disease.
    • Assessment includes detecting hypoxemia and intrapulmonary shunting via a bubble test.
    • Evaluation of symptoms like orthodeoxia (worsening dyspnea when upright).

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    A Pulmonary Trunk Banding Model of Pressure Overload Induced Right Ventricular Hypertrophy and Failure
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    Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats
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    The Left Pneumonectomy Combined with Monocrotaline or Sugen as a Model of Pulmonary Hypertension in Rats
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    A Pulmonary Trunk Banding Model of Pressure Overload Induced Right Ventricular Hypertrophy and Failure
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    A Pulmonary Trunk Banding Model of Pressure Overload Induced Right Ventricular Hypertrophy and Failure

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    Main Results:

    • HPS is characterized by a triad of liver disease, pulmonary vascular changes, and hypoxemia.
    • Orthodeoxia, a hallmark symptom, signifies a significant drop in arterial oxygen levels when standing.
    • Altered pulmonary vascular tone leads to changes in lung blood flow distribution.

    Conclusions:

    • Liver transplantation remains the only definitive treatment for hepatopulmonary syndrome.
    • Early diagnosis and understanding of HPS pathophysiology are crucial.
    • Further research into non-transplant therapies may be warranted.