After all it s hard to think of any condition that prevents you from sleeping costing you energy and wakefulness during the day and connected to a host of other serious diseases like heart failure and stroke as anything other than severe. Obstructive sleep apnea can range from mild to severe based on a measurement system called the apnea hypopnea index ahi. Cpap Is An Effective Treatment For Moderate To Severe Sleep Apnea The ahi measures the number of breathing pauses that you experience per hour that you sleep. Moderate to severe sleep apnea . People with sleep apnea don t always notice that they wake up frequently during the night which is why a list of. While better than severe it s still dead serious. A form of obstructive sleep apnea that falls between mild and severe moderate sleep apnea is like all forms of sleep apnea a condition that causes you to wake up multiple times per hour while you re trying to sleep. Obstructive sleep apnea is classified by severity. With...