Many of the adverse cardiovascular consequences of OSA are thought to be associated with a diminished cardiac vagal activity, as parasympathetic cardiac vagal activity is typically cardio-protective. Intranasal administration of oxytocin has been shown to significantly increase parasympathetic and decrease sympathetic cardiac control. In this research study, the effect oxytocin has on changes in heart rate or other Polysomnography (PSG) measures in a group of patients that have recently been diagnosed with OSA will be examined.