Table 1.

Inclusion criteria. In order to be eligible to participate in this study, a subject must meet all of the following criteria

1	Written informed consent obtained from subject aged ≥18 years
2	Diagnosis of chronic heart failurea (≥3 months) in NYHA functional class III with 1 HF hospitalisation within 12 months (defined as an admission for HF longer than 6 h and/or use of i.v. diuretics) or emergency ward visit for HF resulting in i.v. diuretic therapy (independent of EF %)
3	HF subjects with reduced EF (HFrEF) should be treated according to national and international (ESC) guidelines for optimal or maximum tolerated doses of HF medication and evaluated for ICD or CRT‑D therapy, if indicated
4	Subjects with a BMI ≤ 35. Subjects with BMI > 35 will require their chest circumference to be measured at the axillary level < 65 inches or 165 centimetre (related to distance of the sensor to the pillow)
5	Subjects willing and able to comply with the follow-up requirements of the study and able to comply with the daily readings

^aAccording to the definition given in the 2016 ESC guidelines for heart failure [10]. In line with good clinical practice, a patient cannot participate in any other interventional study or active telemonitoring programme (on HF parameters) during the study

NYHA New York Heart Association, HF heart failure, EF ejection fraction, ESC European Society of Cardiology, ICD implantable cardioverter-defibrillator, CRT‑D cardiac resynchronization therapy defibrillator, BMI body mass index