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Carotid stenosis may not cause any symptoms. When carotid stenosis causes a TIA or stroke, symptoms may include:

  • Weakness or paralysis of an arm and/or leg on one side of the body
  • Loss of coordination or movement
  • Confusion, dizziness, or fainting
  • Loss of sensation in the face, an arm, or a leg
  • Problems with speech or vision

People experiencing these symptoms should seek care immediately by calling 911.

Magnetic resonance angiography of artery with carotid stenosis
Magnetic resonance angiography is one of several tests that may be used to diagnosis carotid stenosis.

NewYork-Presbyterian Hospital uses the following tests to diagnose carotid stenosis:

  • Carotid ultrasound using a duplex scan, a noninvasive way to assess blood flow in the carotid arteries
  • Magnetic resonance imaging or magnetic resonance angiography
  • Computed tomography scan
  • Angiography

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