The purpose of this clinical investigation (NCT00957073) is to continue long-term follow-up of device arm subjects enrolled in the HOPE4HF Trial, utilizing the BAROSTIM NEO™ LEGACY device for Implantable Pulse Generator (IPG) replacements.

The initial trial design randomized subjects in a 2:1 ratio to receive a Rheos system plus medical management (Device Arm) or to receive medical management alone (Medical Management Arm). On March 24, 2011, the study closed to enrollment before adequate endpoint data was collected and before enrollment was completed; 19 subjects had been randomized, 10 device and 9 medical management. Medical management subjects were withdrawn from the study and subjects who had been implanted with the device were given the opportunity to continue in the study under long-term follow-up; 8 of the 10 device subjects continued in the study. Long-term follow-up visits occurred at 15 and 18 months post-randomization; visits occur semi-annually until study closure.

The study was not stopped for safety or futility, but for business/strategic reasons due to production of a new generation of the device.

Inclusion Criteria:

1. Currently implanted with the Rheos device and actively participating in the HOPE4HF Trial (G090001).
2. Have signed a CVRx, FDA and Institutional Review Board (IRB) approved informed consent form for participation in this study.

Exclusion Criteria:

1. Treating physician decision that the subject should not continue with therapy.