The present disclose generally relates to a system that controls blood pressure based on feedback-based neural stimulation. The system can include an electrode implantable within a nerve (e.g., an intra-fascicular electrode). The system can also include a hermetically-sealed electronics module connected to the electrode to record data related to neural activity from the nerve. The data related to the neural activity is indicative of the blood pressure. The system can also include an external device to communicate with the hermetically-sealed electronics module to receive and analyze the data related to the neural activity.