Sleep disordered breathing is very common in patients with chronic heart failure with reported prevalence rates of 50-75%. Adaptive Servo-Ventilation (ASV) can be used to treat sleep apnea in these patients. This is an observational study to document changes in respiratory parameters in HF patients using ASV for a period of 12 months.
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Correlation of hypoxemia, as measured by overnight pulse oximetery, with worsening heart failure
Timeframe: 12 months