What is reno vascular hypertension?

Kidney artery. Kidneys are critical regulators of salt balance and bp, and when a partial renal arterial obstruction develops, the level of BP sensed by the kidney decreases. This trigger a number of processes, notably increased secretion of renin, which raise systemic bp, resulting in hypertension. Renovascular hypertension can sometimes be improved or even cured by relief of the obstruction.
Bp from kidneys. Renal artery steno sis that can raise BP from hormone activated mechanism for bp eg. Renal artery steno sis from either intimal muscular hypertrophy or atherosclerosis with stenosis.