881 Arousal and Post-Event Tachycardia—Azarbarzin et al INTRODUCTION Heart rate increases at the end of obstructive events in patients with obstructive sleep apnea (OSA).1-4 In most cases, there is an associated cortical arousal.5-9 Spontaneous arousals (i.e., without OSA) are also associated with an increase in heart rate10-14 Given these observations, the notion that postevent tachycardia is ...