Central sleep apnea.

Area of Science:

• Sleep Medicine
• Respiratory Medicine
• Neurology

Background:

• Central sleep apnea (CSA) presents with diverse symptoms and can be a standalone condition or secondary to other syndromes.
• The underlying causes of CSA vary, but a common feature is the withdrawal of the ventilatory drive during sleep, often leading to hypocapnia.

Purpose of the Study:

• To review the varied pathogenesis, clinical manifestations, and diagnostic approaches for central sleep apnea.
• To discuss current and emerging therapeutic strategies for CSA, considering its heterogeneity and associated conditions.

Main Methods:

• Review of medical literature on central sleep apnea.
• Analysis of diagnostic methods, primarily nocturnal polysomnography.
• Evaluation of current treatment modalities and ongoing research.

Main Results:

• CSA is associated with conditions such as heart failure, stroke, spinal cord injury, and opioid use.
• Nocturnal polysomnography is the standard for diagnosis, assessing sleep and respiratory parameters.
• Management is individualized, incorporating clinical status, comorbidities, and polysomnography results.

Conclusions:

• The pathophysiologic diversity of CSA contributes to its varied presentations and the lack of a universal treatment.
• Current treatments are often adapted from those for obstructive sleep apnea, with positive airway pressure (e.g., CPAP) as a primary option.
• Further research is needed to explore novel pharmacologic and device-based therapies for CSA.