Thanks to the SonR technology it is possible to adjust the optimal VV and AV delays over time, in a fully automatic, time saving and operator independent way. It is possible to optimize the VV and AV delays in office, during follow-up visits, but also enable the automatic optimization that weekly optimize the AV and VV delays.~For the reasons mentioned above, the sponsor expects that the SonR optimization method increases the number of patients optimized systematically at each follow-up The purpose of this study is to evaluate the percentage of patients optimized at least once every month by the SonR automatic optimization method, until M6 follow-up, in HF patients prevalently in sinus rhythm.~The primary objective will be evaluated as the percentage of patients successfully optimized every month until M6.~A patient is considered successfully optimized by the SonR during one month if at least one Atri-Ventricular (AV) or Ventricular-Ventricular (VV) optimization is completed by the SonR automatic optimization method during the month.~Patients eligible for the analysis are those with SonR automatic optimization function enabled and at least 50% of the time in sinus rhythm
Evaluate the percentage of patients optimized at least once every month by the SonR automatic optimization method, until M6 follow-up, in Heart failure (HF) patients prevalently in sinus rhythm