Hypopnea
Hypopnea. Respiratory event index (rei) is a measure that is sometimes used instead of the ahi in sleep testing that is done at. People with osa experience a collapse of their airways during sleep. Hypopnea Symptoms, Treatments, and More from www.healthline.com Signs that a person is experiencing dyspnea include: People with obstructive sleep apnea or central sleep apnea commonly experience a large number of hypopneas at night. Dyspnea can happen due to overexertion, spending time at high altitudes, or as a symptom of several conditions. ...