Renovascular hypertension is a type of high blood pressure (hypertension) caused by the narrowing of one or both of the blood vessels connected to the kidneys. The same fatty plaques that damage artery walls and cause heart disease can be at fault, along with other conditions. The narrowing (stenosis) can cause severe high blood pressure and kidney damage. Symptoms include severe high blood pressure, high blood pressure that doesn’t respond to medication or stops responding when it did previously, and high blood pressure with no family history.