Bitter, Thomas Circadian variation of defibrillator shocks in patients with chronic heart failure: the impact of Cheyne-Stokes respiration and obstructive sleep apnea. [electronic resource] - International journal of cardiology Oct 2014 - 1033-5 p. digital Publication Type: Letter ISSN: 1874-1754 Standard No.: 10.1016/j.ijcard.2014.07.294 doi Subjects--Topical Terms: AgedCheyne-Stokes Respiration--diagnosisChronic DiseaseCircadian RhythmDefibrillators--trendsElectric Countershock--trendsFemaleFollow-Up StudiesHeart Failure--diagnosisHumansMaleMiddle AgedSleep Apnea, Obstructive--diagnosis