Validation of the "ApneaScan" Algorithm for the Detection of Sleep Disordered Breathing in Chronic Heart Failure

Inclusion Criteria

• •Age over 18 years
• •Patient´s written informed consent
• •Patients with a cardiac rhythm management device (ICD with or without cardiac resynchronization therapy function) of the "Incepta" series (including the ApneaScan algorithm) already implanted for at least 8 weeks (corresponding to the duration of the leads´ healing process); in order to standardize the enrollment period, inclusion should be effected between the first (the earliest 8 weeks after implantation) and the second routine control of ICD-function (the latest 9 months after implantation)
• •Stable symptomatic chronic heart failure for either ischemic or non-ischemic reason (moderately to severely impaired systolic left ventricular function with NYHA-class II to III) under optimal pharmacological treatment (according to guidelines 2012 of the European Society of Cardiology)