An angiogram is an X-ray of the arteries and vessels that supply blood to the heart or brain. A catheter is inserted into a blood vessel from the arm or groin. Once in position, a dye is released into the artery, which makes the vessels visible through x-rays. The Internet Stroke Center at Washington University caution that a catheter may dislodge plaque that could block an artery of the brain, causing stroke.
Weakness
The American Stroke Association lists five major warning signs of stroke, the first being sudden numbness or weakness in any of the extremities, such as the hand or leg, or in the face, on either side of the body. It warns that even if it is temporary, patients should be taken seriously and seek immediate medical assistance.
Difficulty with Vision
Any blurred vision that occurs suddenly can also be a sign of a stroke. This vision loss is called hemianopia, loss of vision in half of the visual field. Community Services for the Blind and Partially Sighted in Seattle says vision impairment after a stroke may be severe or so slight that it may go undetected. Weakness of an affected side may also be accompanied by poor vision on that same side.
Trouble Speaking
Difficulty with speech, slurring of words or understanding that comes on suddenly may indicate stroke, even if it is only temporary. There may be a deficit in communication skills, unclear speech, poor coordination of the lips or tongue or the inability to speak at all. The person may not be able to put together sentences, stay on topic or access appropriate words.
Dizziness
Another sign of stroke is a sudden onset of dizziness or trouble walking. A sudden loss of coordination or balance may occur. Dizziness is caused by reduced blood flow or blockage of any one of the numerous arteries in the back area of the brain.
Headache
A sudden occurring headache, severe and unexplainable, is another sign of stroke. Known as secondary headaches, they are caused by the pressing, pulling or pushing of pain-sensitive nerve endings. In a stroke, this is caused by the swelling or rupturing of blood vessels on or near the nerve site.
References
- Heart and Stroke Foundation:Angiography
- Internet Stroke Center at Washington University:Cerebral Angiography
- The American Stroke Foundation:Learn To Recognize A Stroke
- Community Services for the Blind and Partially Sighted: Strokes and Vision Loss
- American Speech-Language-Hearing Association: Stroke
