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Related Concept Videos

Pulmonary Embolism I: Introduction01:29

Pulmonary Embolism I: Introduction

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...
Pulmonary Embolism I: Introduction01:19

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A blood clot, or thrombus, is a semi-solid mass composed of fibrin, platelets, and red blood cells. When it forms within a vessel, it can obstruct blood flow, known as thrombosis. If part of the clot detaches, it becomes an embolus that can travel and block distant vessels. When this occurs in the pulmonary arteries, it causes a condition known as pulmonary embolism (PE).Origin and ImpactMost often, the embolus originates from a thrombus in the deep veins of the lower limbs, a condition called...
Other Pulmonary Disorders01:17

Other Pulmonary Disorders

Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

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Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
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In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
Chronic Obstructive Pulmonary Disease I: Introduction01:23

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Chronic obstructive pulmonary disease is a common, preventable, and treatable respiratory disorder characterized by persistent symptoms and progressive airflow limitation. This limitation results from a combination of small-airway disease (obstructive bronchiolitis) and parenchymal destruction (emphysema), both driven by chronic inflammation from exposure to harmful particles or gases.The disease includes two main pathological entities: emphysema, marked by destruction of alveolar walls and...

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Related Experiment Video

Updated: May 14, 2026

Oropharyngeal Administration of Bleomycin in the Murine Model of Pulmonary Fibrosis
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Exercise-induced haemoptysis: a thoroughbred cause?

James H Hull1, Andrew Menzies-Gow, Andrew G Nicholson

  • 1Department of Respiratory Medicine, Royal Brompton Hospital, London, UK. jiminio@doctors.org.uk

Thorax
|February 14, 2013
PubMed
Summary
This summary is machine-generated.

This case report details exercise-induced haemoptysis, a rare symptom, revealing an unexpected cause: pulmonary vein stenosis. The study offers insights into diagnosing and managing this condition.

Keywords:
ExerciseHistology/CytologyImaging/CT MRI etcInterstitial Fibrosis

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Last Updated: May 14, 2026

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Area of Science:

  • Cardiology
  • Pulmonology
  • Medical Case Reports

Background:

  • Exercise-induced haemoptysis is a rare clinical presentation.
  • Pulmonary vein stenosis is an uncommon cause of respiratory symptoms.

Observation:

  • A novel case of exercise-induced haemoptysis was identified.
  • The underlying pathology was found to be pulmonary vein stenosis.

Findings:

  • The case highlights the importance of considering pulmonary vein stenosis in patients with unexplained haemoptysis.
  • Diagnostic and management strategies for pulmonary vein stenosis are discussed.

Implications:

  • This report contributes to understanding rare causes of exercise-induced haemoptysis.
  • It provides a practical guide for clinicians managing pulmonary vein stenosis.