Upper airway resistance syndrome (UARS) is caused by a slowing or blockage of air in the nasal passages during sleep, disrupting it and causing fatigue. Upper Airway Resistance Syndrome UARS. Sleep Medicine Center. 650-723-6601. Symptoms.

Is UARS sleep apnea?

Upper airway resistance syndrome (UARS) happens when the soft tissue in your throat relaxes and doesn't allow proper airflow while you sleep. It's similar to obstructive sleep apnea (OSA) but not as severe. Some experts classify UARS as a condition that falls somewhere between snoring and sleep apnea.

What causes Rera sleep?

Respiratory effort-related sleep arousal, also known as RERAs, occur when breathing takes a greater effort for ten or more seconds during sleep, causing a sudden change in your sleep cycle.