Renal Artery Stenosis-health geeku

Renal Artery Stenosis-Symptoms and Causes

Renal Artery Stenosis

Renal artery stenosis is the narrowing of one or more arteries that take blood to your kidneys (renal arteries).

Narrowing of the arteries limits normal sums of oxygen-rich blood from carrying your kidneys. Your kidneys necessitate sufficient blood flow to help filter waste products and eliminate excess liquids. Decreased blood flow may raise (BP)blood-pressure in your entire body and damage kidney tissue.

Renal Artery Stenosis Symptoms

Renal artery stenosis may have no signs or symptoms until the situation leads to an exceptional state. The condition sometimes discovered unexpectedly during testing for some other reason.

  • Suddenly High Blood Pressure
  • High blood pressure that occurs before age 30 or after age 50

Other signs and symptoms

  • Difficulty in treating high blood pressure
  • Whooshing noise as blood flows by a narrowed vessel (bruit).
  • Abnormal kidney function and protein levels elevated in urine
  • While treating high blood pressure, worsening kidney function
  • The body’s tissue swelling and overloaded fluid.
  • Heart failure

Seek Medical Advice

Make an appointment with your physician if you have any resolute signs or symptoms that bother you.

Renal Artery Stenosis Causes

Renal Artery Stenosis

There two key causes of renal artery stenosis:

  • Atherosclerosis of the renal arteries
  • Fibromuscular dysplasia.


Atherosclerosis is a condition in which fatty substance collects accompanying the walls of arteries. This fatty substance thickens, hardens (forms calcium deposits), and may ultimately block the arteries.

Fibromuscular Dysplasia

Fibromuscular dysplasia happens when the cells inside the artery walls begin to grow abnormally. And it causes hypertension, strokes, heart attacks, and aneurysms.

According to Experts, it affects up to 5% of the community. Up to 75% of all patients with Fibromuscular dysplasia will have the infection in the renal arteries.

The carotid artery is the second most common artery which is affected, Its located in the neck and supplies blood to the brain.

RAS can cause afferent arteriolar pressure to fall. The afferent arterioles are blood vessels that produce nephrons to excretory systems and they also work to regulate blood pressure. These afferent arterioles branch from the renal artery.

Nephrons also work to regulate the blood volume and pressure by improving what is passed as urine and what is reabsorbed into the blood. As you can see, one problem with the renal artery can cause many complexities with the rest of the kidney. Renal artery stenosis can cause hypertension, atrophy of the kidney, and even renal failure.

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Diagnosis of Renal Artery Stenosis

There are plenty of techniques that can use to identify FMD.

These include:

  • Computed tomographic angiography (CTA)
  • Magnetic resonance angiography (MRA),.
  • Ultrasound.
  • Renal arteriography
  • Catheter-based angiogram.
  • Test for hypertension, or high blood pressure.

Risk Factors

  • Aging
  • High blood pressure
  • High cholesterol
  • Diabetes
  • Obesity
  • Smoking or other tobacco use
  • Heart disease-Family History
  • Lack of exercise