Frequent cortical arousal is associated with cardiovascular dysfunction among people with sleep-disordered breathing. Changes in heart rate variability (HRV) can represent pathological conditions associated with autonomic nervous system dysfunction. Previous studies showed changes in cardiac activity due to cortical arousals. https://www.spidertattooz.com/Essie-Gel-Cause-Reflect-0-5-oz-736G-p22291/