Related Experiment Video
Updated: May 29, 2026
05:24
Surgical Lumbar Sympathectomy in Mice
Published on: July 5, 2024
Muscle sympathetic nerve activity in COPD: a systematic review and meta-analysis
Brady Duiker1, Safi Shirazi2, Allison Sivak3
1Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
Summary
Patients with Chronic Obstructive Pulmonary Disease (COPD) have significantly elevated resting muscle sympathetic nerve activity (MSNA). This overactivity may drive cardiovascular issues and exercise intolerance in COPD patients.
Area of Science:
- Cardiology
- Pulmonology
- Neuroscience
Background:
- Cardiovascular disease is a leading cause of mortality in patients with Chronic Obstructive Pulmonary Disease (COPD).
- Elevated sympathetic nerve activity is a proposed mechanism, but its magnitude in COPD remains unquantified.
- Autonomic nervous system imbalance is increasingly recognized in COPD pathophysiology.
Purpose of the Study:
- To determine if adults with COPD exhibit higher resting muscle sympathetic nerve activity (MSNA) compared to healthy individuals.
- To assess the cardiorespiratory effects associated with elevated MSNA in COPD.
- To evaluate the short-term impact of COPD interventions on MSNA.
Main Methods:
- A systematic review and meta-analysis adhering to PRISMA guidelines.
- Searched eight databases from inception to May 2025 for studies measuring MSNA via microneurography in adults with COPD.
- Primary outcomes: MSNA burst frequency and incidence; Secondary outcomes: heart rate and blood pressure.
Main Results:
- Eleven studies (171 COPD participants, 105 controls) were included.
- COPD patients showed significantly higher MSNA burst frequency (+18.5 bursts·min⁻¹) and incidence (+21.3 bursts per 100 heartbeats) versus controls.
- Elevated resting heart rate was observed in COPD, but blood pressure did not differ significantly. Interventions like NIV or β₂-agonists did not alter MSNA.
Conclusions:
- Resting MSNA is significantly elevated in COPD patients, independent of blood pressure.
- This chronic sympathetic overactivity likely contributes to cardiovascular morbidity and exercise intolerance in COPD.
- Therapies targeting sympathetic nerve activity reduction are crucial for managing COPD-related complications.
Related Concept Videos
01:20COPD: Pathogenesis and Clinical Features
Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
01:26COPD: Management Using Bronchodilators and Corticosteroids
Chronic obstructive pulmonary isease (COPD) involves a group of progressive lung disorders characterized by persistent airflow limitation and chronic respiratory symptoms. Asthma-COPD Overlap Syndrome (ACOS), encompassing features of both asthma and Chronic obstructive pulmonary disease (COPD), is a group of progressive lung disorders that includes chronic bronchitis, emphysema, and refractory (non-reversible) asthma. ACOS leads to complex clinical presentations that combine the inflammatory...
01:29Chronic Obstructive Pulmonary Disease-V: Management
Managing Chronic Obstructive Pulmonary Disease (COPD) involves a multifaceted approach to reduce symptoms, prevent exacerbations, improve overall health status, and slow disease progression. Key strategies include lifestyle modifications, pharmacotherapy, supportive therapies, and, in some cases, surgery. Here is an overview of the primary COPD management strategies:
Smoking Cessation
Smoking Cessation
01:27Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies
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.
Medical History
Medical History
01:20Chronic Obstructive Pulmonary Disease-II: Pathophysiology
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
01:24Chronic Obstructive Pulmonary Disease
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...
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...