Cardiac autonomic control during sleep in patients with myotonic dystrophy type 1: the effects of comorbid obstructive sleep apnea

DM1 patients had preserved cardiac autonomic dynamics during NREM and REM sleep, and this phenomenon was not affected by the presence of OSA. However, the comorbidity with OSA was characterized by a reduction in total HRV, which is a marker of the ability of autonomic control to respond to stressors stimuli.