The<unk>  phenomenon is a sudden increase of the upstream<unk>  pressure in a<unk>  vessel (especially artery or arteriole) when the<unk> stream is abruptly blocked by vessel obstruction. The term<unk><unk> " was introduced in cerebral hemodynamics by analogy with the hydraulic expression "water<unk> ", already used in vascular physiology to designate an arterial pulse variety, the "water-hammer pulse". Complete understanding of the relationship between mechanical parameters in vascular occlusions is a critical issue, which can play an important role in the future diagnosis, understanding and treatment of vascular diseases.
Blood hammer
Squawk 
Cowlick
Crutch
Hangover
Cradle cap
Straw 
Hip pointer