Clinical Definition

CSR is characterized by:

  • Cyclical Pattern: Predictable breathing cycles
  • Crescendo-Decrescendo: Gradually increasing then decreasing breathing
  • Central Apneas: Periods of absent breathing effort
  • Heart Failure Association: Common in congestive heart failure
  • Sleep Fragmentation: Causes frequent arousals and poor sleep

CSR typically has cycles lasting 60-90 seconds and is most prominent during NREM sleep.

Etymology & History

CSR was first described by John Cheyne in 1818 and later by William Stokes in 1854. The breathing pattern was recognized long before its association with sleep disorders was understood.

Reference Values & Interpretation

Normal Values

Normal breathing during sleep should be regular without cyclical patterns or central apneas.

Abnormal Values

CSR is diagnosed when there are cyclical breathing patterns with central apneas, typically in the setting of heart failure or other medical conditions.

How It's Measured

CSR is diagnosed through polysomnography showing characteristic cyclical breathing patterns with crescendo-decrescendo ventilation and central apneas.

Role in Diagnosis

CSR diagnosis indicates underlying cardiovascular or neurological conditions and helps guide appropriate treatment approaches.

Role in Treatment

Treatment focuses on optimizing heart failure management and may include ASV, supplemental oxygen, or other supportive measures.

Associated Conditions

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Clinical Guidelines

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Latest Research & Updates

AI-Updated Weekly

Recent research has focused on the cardiovascular implications of CSR and optimal treatment approaches, with ongoing studies examining the role of ASV and other interventions.