Differential Timing of Arousals in Obstructive and Central Sleep Apnea in Patients with Heart Failure Differential Timing of Arousals in Obstructive and Central Sleep Apnea in Patients with Heart Failure Download Ventricular or Pseudo-Ventricular Tachycardia on Polysomnogram Assessment of Drowsiness Based on Ocular Parameters Detected by Infrared Reflectance Oculography