[Sleep-disordered breathing and cardiac arrhythmias]

Area of Science:

• Cardiology
• Sleep Medicine
• Internal Medicine

Context:

• Sleep-disordered breathing (SDB) is a significant comorbidity in patients diagnosed with cardiac arrhythmias.
• Existing research establishes a correlation between SDB and both supraventricular and ventricular arrhythmias.
• In heart failure patients, SDB is independently linked to a reduced event-free survival concerning malignant ventricular arrhythmias necessitating cardioverter-defibrillator therapy.

Purpose:

• To explore the association between sleep-disordered breathing and cardiac arrhythmias.
• To understand the pathophysiological mechanisms linking Cheyne-Stokes respiration and malignant arrhythmias.
• To highlight the need for further research and large-scale trials on SDB treatment's impact on arrhythmia occurrence.

Summary:

• Obstructive sleep apnea contributes to cardiac arrhythmias through mechanisms like repetitive hypoxemia, mechanical stress, sleep arousals, and sympathetic nervous system activation.
• The precise pathophysiological links between Cheyne-Stokes respiration and malignant arrhythmias remain incompletely understood.
• While SDB is associated with arrhythmias, large randomized controlled trials are required to validate if SDB treatment mitigates arrhythmia risk.

Impact:

• Provides insights into the complex relationship between sleep disturbances and cardiovascular events.
• Identifies knowledge gaps in understanding the pathophysiology of SDB-related arrhythmias.
• Emphasizes the clinical importance of investigating SDB treatment as a potential strategy for arrhythmia prevention in at-risk populations.