Sleep disordered breathing (SDB) is prevalent in patients with heart failure (HF). The clinical signs of newly diagnosed HF and untreated SDB may overlap and patients in need of SDB treatment can therefore be difficult to identify in patients participating in disease management programmes (DMP). The aim was to describe the care process of two patients with HF involved in a DMP, focusing on the difficulties to identify and initiate treatment of SDB.A prospective case study design was used to follow one male (70 yrs) and one female (74 yrs) patient during 18 months at a Swedish University hospital. It took 5 to 10 months from diagnosis of HF until optimal treatment was reached for their heart conditions and 12 to 17 months until SDB was treated. None of the patients complained of poor sleep, but suffered from fatigue. In the male SDB was detected by the wife’s complaints of her husband’s snoring, apnoeas and restless sleep. In the female, SDB was detected after a detailed assessment of fatigue which was shown to be sleepiness. After optimal treatment of HF but before imitation of SDB treatment both cases cardiac function improved. For the female case improvements also were found in the blood pressure. SDB treatment improved fatigue in both patients. Initiation of HF treatment and self-care routines, as well as identification of SDB is complex and time consuming. Treatment of HF and SDB can improve sleep, cardiac function as well as disturbing associated symptoms.