Objective To study hypertension morbidity according to WHO/ISH(1999) and WHO(1978) diagnostic standards.

Objective: to inquire into the diagnosis standard of the children hypertension and provide scientifically evidence for prevention children hypertension.

Objective To explore color Doppler flow imaging (CDFI) value in the diagnosis and quantitive analysis of renal artery stenosis (RAS) in patients of hypertension of renal vessel.