These results showed that it is posi-ble for the DA and NA systems to be two pathways of the regulatory effect of RN on the cardiovascular activition.

• 说明RN在调控心血管活动过程中,即可通过DA系统得到加强,又可使NA系统受到制约,DA和NA两个递质系统都是RN调控心血管活动的脑内途径。