The Longest Obstructive Apnea You Have Ever Seen: A Patient With New-Onset Autonomic Dysfunction The Longest Obstructive Apnea You Have Ever Seen: A Patient With New-Onset Autonomic Dysfunction Download The Effects of Sildenafil on the Respiratory System of Patients With Obstructive Sleep Apnea and Erectile Dysfunction Use of Chest Wall EMG to Classify Hypopneas as Obstructive or Central