Resistant hypertension is a severe public health problem and about 20%~30% of all hypertensive patients belong to resistant hypertension.Baroreflex activation therapy(BAT) can reduce blood pressure and heart rate by electrical stimulation of the carotid sinus barorecepters.Rheos Baroreflex Hypertension Therapy System(Rheos,by CRVx.Inc,USA) could be applied to treat resistant hypertension and severe heart failure by chronically activating baroreflex.Its mechanism can be concluded that BAT lowers arterial pre...