Leg Fluid Shift in Patients With Chronic Heart Failure and Obstructive or Central Sleep Apnea

Inclusion Criteria: * Chronic Heart Failure * reduced left ventricular ejection fraction (LVEF) ≤ 45% * NYHA I - IV Exclusion Criteria: * current existing sleep apnoea breathing therapy * significant chronic obstructive pulmonary disease (COPD) Tiffenau-Index: \<70% * respiratory insufficiency with need for a long time oxygen therapy * hypercapnic state in rest at day time * acute myocardial infarction at moment of study * instable angina pectoris at moment of study * cardiac surgery in last twelve weeks * stroke or TIA in last twelve weeks * implantable cardioverter-defibrillator, if there is no security clearance of the fabricator * chronic kidney disease \> Stage III