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  • Vascular Diseases

Renals

What Is Renal Artery Disease?

Renal artery stenosis (RAS) is the narrowing of one or both arteries that carry blood from the heart to the kidneys. The most common cause is atherosclerosis — plaque buildup in the arterial wall. A less common cause is fibromuscular dysplasia (FMD), a non-inflammatory condition affecting younger women.

When kidney blood flow is reduced, the kidneys release hormones that drive up blood pressure — a cycle called renovascular hypertension. Without treatment, this damages both the kidneys and the cardiovascular system over time.

Renal artery disease is a leading correctable cause of secondary (non-essential) hypertension — high blood pressure with an identifiable underlying cause.

Related Conditions

Carotids

Critical Limb Ischemia

Peripheral Artery Disease (PAD)

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Symptoms

Renal artery stenosis is often called a ‘silent’ condition because many patients have no symptoms until disease is significantly advanced. When symptoms appear, they may include:

  • High blood pressure uncontrolled despite multiple medications
  • Rapid or sudden worsening of previously stable blood pressure
  • Declining kidney function — rising creatinine or falling eGFR on blood tests
  • An abnormal abdominal sound (bruit) heard with a stethoscope
  • Leg and ankle swelling from fluid retention
  • Flash pulmonary edema — sudden-onset fluid in the lungs

If your blood pressure requires 3+ medications and still isn’t controlled, renal artery stenosis should be evaluated.

Risk Factors

Atherosclerotic renal artery stenosis shares risk factors with other vascular diseases:

  • Age over 55
  • Hypertension (high blood pressure)
  • Diabetes mellitus
  • Cigarette smoking
  • Elevated cholesterol or triglycerides
  • Obesity
  • Pre-existing coronary artery disease, PAD, or carotid stenosis
  • Family history of vascular or kidney disease

Fibromuscular dysplasia (FMD) is more common in women under 50 and is not associated with the traditional cardiovascular risk factors above.

Diagnosis

Accurate diagnosis requires imaging of the renal arteries combined with assessment of kidney function:

  • Renal Duplex Ultrasound — non-invasive first-line imaging measuring blood flow velocity
  • CT Angiography (CTA) — detailed 3D imaging of the renal arteries using contrast
  • MR Angiography (MRA) — magnetic resonance imaging without radiation
  • Renal Angiography — the definitive diagnostic study; catheter-based, can be combined with treatment
  • Blood & urine tests — creatinine, eGFR, urinalysis to assess kidney function

Treatment Options

Treatment depends on the severity of stenosis, kidney function trend, and blood pressure response to medication.

Medical Management

Careful antihypertensive therapy, statins, antiplatelet agents, and lifestyle changes. Some medication classes are contraindicated in bilateral stenosis — specialist guidance matters.

Angioplasty & Stenting

Catheter-based procedure to open the narrowed artery with a balloon and maintain patency with a stent. Performed by Dr. Ibrahim as part of our comprehensive vascular program.

Surgical Revascularization

Open surgical bypass or arterial reconstruction in rare, anatomically complex cases where catheter-based approaches are not feasible.

Ongoing Monitoring

Regular blood pressure tracking, kidney function tests, and imaging to assess treatment response and detect progression early.

Frequently Asked Questions

Common questions about Renal Artery Disease

Can renal artery stenosis cause kidney failure?

Yes. Without treatment, severe or bilateral renal artery stenosis can lead to progressive chronic kidney disease and, in advanced cases, end-stage renal disease requiring dialysis.

How is renovascular hypertension different from regular high blood pressure?

Regular hypertension has no single identifiable cause. Renovascular hypertension is caused specifically by reduced blood flow to the kidneys triggering hormonal signals. It often doesn’t respond well to standard medications.

Is renal artery stenting painful?

The procedure is performed under local anesthesia and sedation. Most patients experience minimal discomfort. Recovery is typically 1–2 days of limited activity.

What is fibromuscular dysplasia (FMD)?

FMD is a non-inflammatory disease of arterial walls — unrelated to cholesterol or atherosclerosis — that can cause renal and carotid artery narrowing. It primarily affects women under 50 and requires specific diagnostic and treatment approaches.

Explore Related Conditions

Vascular and venous conditions are often connected — early evaluation of one may uncover another.

Carotids

Critical Limb Ischemia

Peripheral Artery Disease (PAD)

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Gupta Cardiology’s physicians are here to help determine the best treatment path for all our patients. Our physicians evaluate each patient on a case-by case basis to determine the best course of treatment.

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