H
Hypopnea event - Literally, underbreathing. Breathing that is shallower or slower than normal and is associated with a partial obstruction of the airway. Hypopnea is distinct from apnea in which there is no breathing.Hypertension - High blood pressure, defined as a repeatedly elevated blood pressure exceeding 140 over 90 mmHg -- a systolic pressure above 140 with a diastolic pressure above 90.