hypopnea

**Hypopnea** refers to a partial reduction in breathing during sleep, characterized by shallow or slower breaths that last for at least 10 seconds. It is a common feature of sleep-disordered breathing conditions, such as obstructive sleep apnea. Hypopnea can lead to decreased oxygen levels in the blood and disrupted sleep patterns, resulting in daytime fatigue and other health issues. Monitoring and managing hypopnea is important for maintaining overall sleep quality and cardiovascular health.