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Treatment options for renovascular hypertension
1Stroke Prevention & Atherosclerosis Research Centre, Roberts Research Institute, 1400 Western Rd., London, Ontario, Canada N6G 2V2. dspence@rri.ca
Expert Opinion on Pharmacotherapy
|April 6, 2002
Summary
Renovascular hypertension, often caused by renal artery stenosis, requires careful diagnosis. Treatment options include medication and revascularization, with a focus on managing blood pressure effectively.
Area of Science:
- Nephrology
- Cardiology
- Vascular Medicine
Background:
- Renovascular hypertension (RVH) stems from renal artery stenosis, frequently overlooked in patients with cardiovascular conditions.
- RVH differs from renal artery stenosis; in RVH, the kidney actively elevates blood pressure to perfuse a blocked artery.
Purpose of the Study:
- To clarify the diagnosis and management of renovascular hypertension.
- To address the limited evidence for treatment strategies and the underutilization of effective medications.
Main Methods:
- Diagnosis involves functional tests measuring glomerular filtration rate (GFR) before and after renin-angiotensin system blockade.
- Nuclear medicine differential GFR, enhanced by renin-angiotensin system blockers, is recommended for patient evaluation.
Main Results:
- Limited randomized trials exist for angioplasty versus medical therapy and ACE inhibition versus alternatives.
- Effective medications like ACE inhibitors and ARBs are underused due to rare, reversible complications (acute renal failure).
Conclusions:
- RVH diagnosis requires functional assessment, distinguishing it from simple renal artery stenosis.
- Revascularization is indicated if medical therapy fails or impairs renal function; surgical options are favored by some experts.