Periodic Breathing Periodic Breathing • 1) Cheyne-Stokes Breathing• Apnea and Hyperapnea go on cyclically

• Causes of Cheyne- Strokes Breathing1) A long delay occurs for transport of blood from the lungs to the

brain. Eg.: Severe cardiac failure2) Negative feedback gain in the respiratory control areas. This type of

breathing occurs mainly in patients with brain damage. 3) Loss of automaticity of the respiratory center

Cheyne- Strokes BreathingCheyne- Strokes BreathingIt occurs in A Physiological Conditions1. Healthy infants2. Healthy adults during deep sleep.3. Voluntary Hyperventilation4. At higher altitudeB Pathological conditions1. Due to hypoxia2. Ureamia3. Cardiac failure4. Drugs poisoning - Morphine5. Raised Intracranial Pressure

Biot’s BreathingBiot’s Breathing• Seen in cases of severe brain damage,

meningitis.• Does not occur in physiological conditions.• 3-4 cycles of normal breathing followed by

abrupt onset of apnea & again abrupt onset of deep breathing