Atrioventricular Block During the Phasic Events of REM Sleep in a Patient with Severe Obstructive Sleep Apnea Syndrome Atrioventricular Block During the Phasic Events of REM Sleep in a Patient with Severe Obstructive Sleep Apnea Syndrome Download A Polysomnographic Placebo-Controlled Evaluation of the Efficacy and Safety of Eszopiclone Relative to Placebo and Zolpidem in the Treatment of Primary Insomnia Correlation Between Severity of Obstructive Sleep Apnea and Prevalence of Silent Cerebrovascular Lesions