Several decades of investigation have provided unequivocal support for the existence of an intrinsic brain reninangiotensin (Ang) system (RAS) and its involvement in the control of cardiovascular functions.1,2 Essential components of the RAS, ie, renin, angiotensinogen, Ang-converting enzyme, Ang-converting enzyme 2, type 1 Ang II, and type 2 Ang II receptors, as well as various aminopeptidases...