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Related Concept Videos

Sleep Apnea01:21

Sleep Apnea

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Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
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Chronic Obstructive Pulmonary Disease01:22

Chronic Obstructive Pulmonary Disease

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COPD is defined as a heterogeneous lung condition marked by persistent respiratory symptoms such as dyspnea, cough, and sputum production, caused by abnormalities in the airways that cause airflow obstruction.
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
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Hyperpnea and Hyperventilation01:25

Hyperpnea and Hyperventilation

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Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
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Other Pulmonary Disorders01:17

Other Pulmonary Disorders

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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.
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Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

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Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration...
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Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies01:27

Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies

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Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
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Author Spotlight: Traditional Chinese Medicine for Sleep Disorders in Acute COPD &#8212; A Safe, Cost-Effective Approach
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Association Between Exertional Dyspnea and OSA.

Stéphane Mouraux1, Benoît Lechartier1, Théo Imler2

  • 1Division of Pulmonology, Department of Medicine, Lausanne University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland.

Chest
|December 24, 2025
PubMed
Summary
This summary is machine-generated.

Exertional dyspnea is linked to moderate and severe obstructive sleep apnea (OSA). This association may stem from increased autonomic and cortical responses to respiratory effort, warranting further investigation into OSA treatment efficacy.

Keywords:
OSAapnea-hypopnea indexautonomic reactivitydyspneapolysomnographysleep apneaunexplained breathlessnessunexplained dyspnea

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Area of Science:

  • Pulmonary Medicine
  • Sleep Medicine
  • Cardiorespiratory Physiology

Background:

  • Exertional dyspnea is a common symptom, increasing mortality and often unexplained.
  • Obstructive sleep apnea (OSA) is known to impair exercise capacity, but its direct link to dyspnea is unclear.

Purpose of the Study:

  • To investigate the association between exertional dyspnea and OSA in the general population.
  • To identify polysomnographic measures of OSA related to exertional dyspnea.

Main Methods:

  • Prospective cohort study utilizing polysomnography and respiratory questionnaires.
  • Logistic regression models analyzed the link between self-reported dyspnea (mMRC score ≥1) and OSA severity (AHI cut-offs).
  • Adjusted models controlled for factors including age, sex, BMI, FEV1, and comorbidities.

Main Results:

  • Over 1200 participants (mean age 62.1 years) were analyzed, with 42.9% reporting exertional dyspnea.
  • Exertional dyspnea showed a positive association with moderate (OR 1.60) and severe OSA (OR 2.25), and higher apnea-hypopnea index (AHI) values (≥15/h and ≥30/h).
  • Dyspnea correlated with AHI, respiratory disturbance index, and oxygen desaturation index 3%.

Conclusions:

  • Moderate to severe OSA is associated with exertional dyspnea.
  • Heightened autonomic and cortical responses to respiratory effort may explain this link.
  • Further research is needed to evaluate OSA treatment's impact on dyspnea.