Apnea Hypopnea Index « Back to Glossary IndexThe number of apneas and hypopneas that occur during an hour of sleep. Related Articles: The Goals of Obstructive Sleep Apnea TreatmentApnea – A Word with Many UsesWhat is the AHI (Apnea Hypopnea Index)Hypoglossal Nerve Stimulator*Home« Back to Glossary Index