What is Renovascular hypertension?
Renovascular hypertension (or "renal hypertension") is a syndrome which consists of high blood pressure caused by the kidneys' hormonal response to narrowing of the arteries supplying the kidneys (renal artery stenosis). When functioning properly this hormonal axis regulates blood pressure. Due to low local blood flow, the kidneys mistakenly increases blood pressure of the entire circulatory system. It is a form of secondary hypertension - a form of hypertension whose cause is identifiable. It accounts for 5% to 10% of all hypertensive patients in US. Its prevalence is 2% in those who have a diastolic blood pressure of more than 100 mmHg and approximately 30% in patients who have diastolic blood pressure more than 130mmHg. Patients with renal hypertension are at increased risk of end organ dysfunction, including permanent kidney damage, if inadequate pharmacologic therapies are used to control blood pressure.