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Related Concept Videos

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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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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Pulmonary Embolism I: Introduction01:29

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Pulmonary embolism (PE) occurs when a thrombus, fat or air embolus, amniotic fluid, or tumor tissue blocks one or more pulmonary arteries. These blockages originate in the venous system or the right side of the heart.EtiologyPE primarily arises from deep vein thrombosis (DVT) and other hypercoagulable states, such as inherited thrombophilias. Additional etiological factors include venous stasis, commonly seen in obesity, and endothelial injury from surgery and trauma. Less common causes include...
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Pneumothorax-I01:26

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A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
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Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.01:25

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Understanding the variety of primary symptoms and systemic complications that characterize chronic obstructive pulmonary disease (COPD) is crucial for healthcare professionals.
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
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Updated: Apr 16, 2026

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

Yong Lv1, Daiming Fan

  • 1Department of Liver Disease, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China, lvyong126@126.com.

Digestive Diseases and Sciences
|March 4, 2015
PubMed
Summary
This summary is machine-generated.

Hepatopulmonary syndrome (HPS) causes hypoxemia in liver disease patients due to lung vascular changes. Liver transplantation is the only effective treatment for HPS, improving outcomes.

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Area of Science:

  • Cardiology
  • Pulmonology
  • Hepatology

Background:

  • Hepatopulmonary syndrome (HPS) is a serious complication in chronic liver disease and portal hypertension.
  • It involves intrapulmonary vascular dilatation leading to hypoxemia and impaired gas exchange.
  • Microvascular changes and angiogenesis in the lungs are key pathological features.

Purpose of the Study:

  • To review the pathophysiology, diagnosis, and treatment of hepatopulmonary syndrome.
  • To highlight the role of diagnostic imaging and the impact of HPS on patient outcomes.

Main Methods:

  • Literature review of hepatopulmonary syndrome.
  • Discussion of diagnostic tools including pulse oximetry, arterial blood gases, and imaging modalities like echocardiography, lung scans, and arteriography.

Main Results:

  • HPS is characterized by intrapulmonary vascular abnormalities causing hypoxemia.
  • Pulse oximetry serves as an effective screening tool.
  • Contrast-enhanced echocardiography, perfusion lung scanning, and pulmonary arteriography are diagnostic imaging methods.

Conclusions:

  • Hepatopulmonary syndrome significantly increases mortality and reduces quality of life.
  • Liver transplantation is the only established effective treatment, reversing HPS.
  • No current medical therapies are proven effective for HPS.