Effect of Astragalus Membranaceus on Baroreflex Sensitivity in Spontaneously Hypertensive Rats Effect of Jimaitong tablt combined with nifedipine on blood-pressure andmechanisms investigation in spontaneously hypertensive rats Effect of paeonol on blood pressure and blood flow in artery of spontaneously hypertensive rats and its mechanisms related on vasomotion Effects of Tiangou Jiangya capsule on blood pressure in spontaneous hypertensive rat Antihypertensive effect and vascular regulation mechanism of rhynchophylline on spontaneously hypertensive rats