An exemplary method treating a cardiovascular disease in a patient includes 1) generating, by an electroacupuncture device implanted beneath a skin surface of the patient at an acupoint corresponding to a median nerve of the patient, stimulation sessions at a duty cycle that is less than 0.05, wherein the duty cycle is a ratio of T3 to T4, each stimulation session included in the stimulation sessions has a duration of T3 minutes and occurs at a rate of once every T4 minutes, and the electroacupuncture device comprises a central electrode of a first polarity and an annular electrode of a second polarity and that is spaced apart from the central electrode; and 2) applying, by the electroacupuncture device, the stimulation sessions to the median nerve by way of the central electrode and the annular electrode in accordance with the duty cycle.