But you may not be familiar with its cousin, hypopnea. Apnea and hypopnea are different versions of a condition called obstructive sleep apnea hypopnea syndrome. Some people have both apnea and ...

The apnea-hypopnea index (AHI) is a scale that tells whether you have a sleep disorder called apnea and, if so, how serious it is. Sleep apnea is when you stop breathing for 10 seconds or more ...