Monitoring of Arrhythmias and HRV in Patients With Heart Failure Treated With the CRT Pacemaker Renewal TR2

Monitoring of Arrhythmias and Heart Rate Variability in Patients With Congestive Heart Failure Treated With the Cardiac Resynchronisation Pacemaker Renewal TR2

The objective of this study is to evaluate the prevalence of sustained ventricular and supraventricular rhythm disorders in patients implanted with a CONTAK RENEWAL TR2 ventricular resynchronization therapy (CRT) device

Inclusion Criteria:

• Moderate or severe chronic heart failure, defined by the presence of NYHA class III or IV symptoms, Intra/interventricular synchronization disorder evaluated by echocardiography and/or Doppler Tissue Imaging (DTI, Yu's method22), Ejection fraction (EF) ≤ 40 %, If previous history of myocardial infarction, MI must be > 60 days from the date of inclusion, Estimated life expectancy > 6 months in the case of concomitant disease, Age ≥ 18 years, Optimal drug treatment of chronic heart failure (according to SFC* recommendations).

Exclusion Criteria:

• Conventional indication for treatment by implantable defibrillator upon inclusion, Cardiac transplant envisaged within 6 months, Unexplained syncope, MI < 60 days before inclusion, Non compliance to drug treatment for chronic heart failure, Any coronary pathology which may be treated by revascularisation.