Which statement about Cheyne-Stokes respirations is true?

Which statement about Cheyne-Stokes respirations is true?

• A. It is never observed during sleep.
• B. It is exclusively associated with obstructive sleep apnea.
• C. Cheyne-Stokes breathing can occur with damage to the central nervous system, hyperventilation, or heart failure.
• D. Pulse oximetry during Cheyne-Stokes respirations shows a steady saturation with no fluctuation.

Answer: (C)

Cheyne-Stokes respiration is a central, periodic breathing pattern in which breaths wax and wane in a regular cycle, often with a short period of apnea between cycles. This pattern reflects instability in the brain’s control of breathing and is influenced by factors that alter CO2 sensitivity or circulatory delay. The statement that is true fits the idea that Cheyne-Stokes breathing can occur with damage to the central nervous system, during states of hyperventilation, or in heart failure. CNS injury or disease can disrupt the normal automatic drive to breathe, while heart failure slows circulation and prolongs the time it takes blood to reach the brain, both contributing to the characteristic oscillations in ventilation. It is not limited to sleep and can be seen during sleep in certain conditions, but it is not exclusive to obstructive sleep apnea, which features recurrent upper airway obstruction rather than this central, cyclical pattern. Pulse oximetry would not show a steady saturation during Cheyne-Stokes breathing; saturations typically fluctuate with the cycles of apnea and ventilation, producing periodic desaturations and recoveries.

Cheyne-Stokes respiration is a central, periodic breathing pattern in which breaths wax and wane in a regular cycle, often with a short period of apnea between cycles. This pattern reflects instability in the brain’s control of breathing and is influenced by factors that alter CO2 sensitivity or circulatory delay.

The statement that is true fits the idea that Cheyne-Stokes breathing can occur with damage to the central nervous system, during states of hyperventilation, or in heart failure. CNS injury or disease can disrupt the normal automatic drive to breathe, while heart failure slows circulation and prolongs the time it takes blood to reach the brain, both contributing to the characteristic oscillations in ventilation.

It is not limited to sleep and can be seen during sleep in certain conditions, but it is not exclusive to obstructive sleep apnea, which features recurrent upper airway obstruction rather than this central, cyclical pattern. Pulse oximetry would not show a steady saturation during Cheyne-Stokes breathing; saturations typically fluctuate with the cycles of apnea and ventilation, producing periodic desaturations and recoveries.