The carotid intima-media thickness test (CIMT) is a measure used to diagnose the extent of carotid atherosclerotic vascular disease. The test measures the thickness of the inner two layers of the carotid artery—the intima and media—and alerts physicians to any thickening when patients are still asymptomatic. Early detection may indicate the need for a more aggressive approach to managing the risk factors associated with heart disease and stroke.
Aging is a contributing factor to increased carotid intima-media thickness. Other risk factors include high lipoprotein levels, high blood pressure, smoking, diabetes, obesity and a sedentary lifestyle.
Physicians use CIMT testing to determine the “age” of the carotid arteries. Knowing that patients may not be experiencing the symptoms of artherosclerosis, there still may be subtle changes in artery thickness. Armed with this information, physicians may develop an aggressive medical approach by prescribing medications such blood pressure and cholesterol lowering agents and aspirin, and patients may be encouraged make lifestyle and dietary improvements.
What would your doctor say… if he/she could actually see inside the blood vessels in your body to look for problems?
Now it’s possible with a simple, painless ultrasound screening that can show dangerous plaque buildup or blockage.
These screenings are safe, accurate, and you don’t have to take your clothes off.
Why Is Plaque Bad?
Plaque that collects in your arteries is made up of substances that are in your blood. This plaque is what we are looking for when we use an ultrasound machine to examine the carotid arteries in your neck (the blood vessels that take blood to your brain). Most of the time, plaque builds up and people don’t feel anything at all. This plaque buildup can change how your blood flows, or pieces of it can break off and travel with your blood to your brain. When that happens, you have a stroke, and for 4 out of 5 people who have a stroke, the first symptom they have of any illness is a stroke.
The Good News
The America Heart Association says that 80% of strokes and heart disease can be prevented. If your screening shows that you have plaque buildup, there are things you and your doctor can do to keep you active and healthy for as long as possible. You keep living your life!
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What to Expect During the Carotid Intima-Media Thickness Test
- No preparation is required for the CIMT test. Patients may resume normal activities immediately following the test unless otherwise instructed.
- A Diagnostic medical sonographer will perform the test.
- A thick gel, the same consistency as hairstyling gel, is applied to the skin of the neck. With the use of a transducer (a small microphone-like device), the gel helps the sound waves to get from the machine into the body.
- Sound waves bounce off the carotid arteries. This creates “echoes” that are reflected back to the transducer, which converts them to electronic signals. A computer then processes the signals into pictures and shows them on a computer monitor.
The test generates a CIMT measurement and a report identifying the patient’s risk profile.