Renal Artery Stenosis (cont.)
Siamak N. Nabili, MD, MPH
Dr. Nabili received his undergraduate degree from the University of California, San Diego (UCSD), majoring in chemistry and biochemistry. He then completed his graduate degree at the University of California, Los Angeles (UCLA). His graduate training included a specialized fellowship in public health where his research focused on environmental health and health-care delivery and management.
Melissa Conrad Stöppler, MD
Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.
In this Article
- Renal artery stenosis facts
- What are the renal arteries?
- What is renal artery stenosis?
- What are the causes of renal artery stenosis?
- How common is renal artery stenosis?
- What are the symptoms of renal artery stenosis?
- What problems does renal artery stenosis cause?
- Who should be screened for renal artery stenosis?
- How is renal artery stenosis diagnosed?
- What are the common imaging tests to evaluate renal artery stenosis?
- What functional tests are used for the diagnosis of renal artery stenosis?
- What are medical treatments for renal artery stenosis?
- What surgical procedures are available for renal artery stenosis?
- Which patients can benefit from surgical procedures for renal artery stenosis?
- Find a local Nephrologist in your town
What surgical procedures are available for renal artery stenosis?
If the results of any of these screening tests suggest an abnormality of the renal artery, an x-ray angiography is then performed. A 75% or greater narrowing of the renal artery seen on the angiogram has been termed treatable renal artery stenosis.
Treatable means that the stenosis of the artery is severe (75% or greater narrowing), the artery needs to be widened (dilated), and it has a good chance of responding favorably to the dilatation. Usually right at the time of the angiography, an angioplasty is done. In this procedure a tiny balloon is inflated in the interior space in the artery (the lumen) to dilate the narrowed artery. Additionally, as part of the angioplasty procedure, a stent (tubular device to prevent recurrence of the narrowing) may be placed in the artery.
In rare cases, vascular surgery (on the blood vessels) may be done for renal artery stenosis. In these situations, typically another vascular surgery near the renal arteries, for example the aorta, is the main procedure. If renal artery stenosis is also present, then a bypass renal artery surgery may be done at the same time.
These invasive procedures are typically reserved for cases that do not respond to medical treatment and where it has been determined that the stenosis is causing or contributing to the uncontrolled high blood pressure. These invasive procedures may only be done if it is thought that the kidney dysfunction or elevated blood pressure can be effectively treated with the procedures.
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