Atrial fibrillation in obstructive sleep apnea: Neural mechanisms and emerging therapies

Area of Science:

• Cardiology
• Sleep Medicine
• Autonomic Neuroscience

Background:

• Obstructive sleep apnea (OSA) is a known risk factor for atrial fibrillation (AF) initiation and progression.
• OSA reduces the effectiveness of standard AF treatments like antiarrhythmic drugs, cardioversion, and ablation.
• Continuous positive airway pressure (CPAP) compliance is often low in OSA patients, necessitating alternative therapies.

Purpose of the Study:

• To explore the role of autonomic nervous system (ANS) modulation as a therapeutic target for AF in OSA patients.
• To review the current understanding of OSA's impact on AF pathogenesis via autonomic activation.
• To highlight the need for further clinical research into ANS-targeted treatments for OSA-associated AF.

Main Methods:

• Review of preclinical and clinical studies on OSA, AF, and autonomic nervous system activity.
• Analysis of evidence linking apneic episodes and chronic OSA to autonomic imbalance.
• Examination of the potential of autonomic modulation strategies for AF management in OSA.

Main Results:

• Acute apneic events in OSA cause sympathovagal co-activation, shortening atrial refractoriness and triggering AF.
• Chronic OSA leads to sympathetic activation, promoting atrial remodeling and AF maintenance.
• Preclinical studies support autonomic modulation as a viable treatment approach for OSA-associated AF.

Conclusions:

• The autonomic nervous system is a key factor in the pathogenesis of AF associated with OSA.
• Autonomic modulation presents a promising therapeutic avenue for managing AF in OSA patients.
• Further clinical studies are essential to define the precise role and efficacy of autonomic modulation in treating OSA-associated AF.