Inclusion Criteria:  Male or non-pregnant female, aged 18 or older; chronic heart failure with symptomatic left ventricular systolic function; (NYHA class II-IVa) with or without device already implanted (for example AICD, pace-maker); Appropriate and optimized medical therapy Patient signed and dated informed consent form at enrollment; life expectancy> 1 year due to the absence of comorbidities that reduce the prognosis  Exclusion Criteria:  absence of venous access available for implant; contraindication to the interventional procedure of CCM device implant (for example presence of Mechanical tricuspid vale); pregnant patients