Cardiac Neuromodulation Therapy (CNT) "Washout" Sub-Study

This washout protocol is structured as a sub-study for patients willing to participate after finishing the double blind randomised phase of the clinical trial, NCT02837445. Devices will be turned off for a week approximately. Patients will have their PHC programmed to automatically turn off 24 hr after a medical and technical visit and remain in regular pacing. Ambulatory recording of the BP will start at the end of the visit, and continue for 24 hr after the turn off time (48 hr recording). Conversely, patients will return at the end of the first week, when a second 48 hr recording will be initiated, this time, the PHC will be programmed to turn on 24 hr later. The recordings therefore will provide data of the ON to OFF transition for the evaluation of the residual effect of PHC after 24 h and after week.