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.nacrack.com/flash-pick-Ib-Laursen-Unika-Mursteinsform-Enkel-mega-value/