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The aim of this first large-scale long-term study was to investigate whether obstructive sleep apnoea (OSA) and/or central sleep apnoea (CSA) are associated with an increased risk of malignant cardiac arrhythmias in patients with congestive heart failure (CHF).

Of 472 CHF patients who were screened for sleep disordered breathing (SDB) 6 months after implantation of a cardiac resynchronization device with cardioverter-defibrillator, 283 remained untreated [170 with mild or no sleep disordered breathing (mnSDB) and 113 patients declined ventilation therapy] and were included into this study. During follow-up (48 months), data on appropriately monitored ventricular arrhythmias as well as appropriate cardioverter-defibrillator therapies were obtained from 255 of these patients (90.1%). Time period to first monitored ventricular arrhythmias and to first …