Vertebrobasilar insufficiency is poor blood flow to the back of the brain because of damage to blood vessels. Blood flow to the back of the brain is supplied by 2 arteries of the neck. These 2 arteries join to form the basilar artery.
Brain tissue requires a regular flow of blood to supply nutrients and oxygen. A decrease in blood flow can cause damage to brain tissue and impair normal function. The area of the brain affected by the basilar artery affects the regulation of consciousness, breathing, heart rate, coordination, balance and vision.
Vertebrobasilar insufficiency is caused by a narrowing or damage of the arteries. The most common cause is
atherosclerosis, a build-up of plaque in blood vessels. This plaque is a combination of fatty substances in the blood, buildup of tissue from injures to the blood vessels walls, and sticky blood cells called platelets.
The plaque makes the pathway for the blood to flow through smaller. It can eventually lead to a complete blockage of the artery. Plaque also makes the blood vessel stiff and less able to adjust to changes in blood flow.
The blood vessels may also be damaged due to congenital defect.
There are no factors related specifically to vertebrobasilar insufficiency. Factors that increase the risk of atherosclerosis in any blood vessel include:
Treatment is focused on reducing further damage to the blood vessels and decreasing the risk of stroke. Options include:
Improving Cardiovascular Health
Lifestyle changes and medical treatment may be recommended if the narrowing of the arteries and symptoms are not severe.
Medication may help manage factors that can worsen symptoms and increase the risk of complications. Prescribed medication may help to:
Lower blood pressure
Decrease the blood's ability to form clots, which can decrease the risk of stroke
Quitting smoking is one of the most important lifestyle changes for vertebrobasilar insufficiency. Smoking causes irritation and damage to the blood vessels and increases the risk of stroke. Other lifestyle habits like healthy diet and regular exercise are also strongly recommended.
More severe blockage or damage may require a procedure to help open the blood vessels.
Endovascular repair is the most common approach. It includes angioplasty and/or stents. Angioplasty places a balloon at the site of the blockage. The balloon is quickly inflated and deflated to help widen the blood vessel. Stenting places a wire or mesh device in the blood vessel that help prop open the blood vessel. The stent may also have medication to help keep the vessel clear of blood clots. Both stenting and angioplasty are done by passing a catheter through blood vessels in the arms or legs and passing it up to the brain.
Open surgery may also be done. These types of surgeries are used less often because of the risk of complications. Some open options include:
—Removes plaque build-up on the inside of the blood vessel.
Bypass—A healthy section of blood vessel is removed from another area of the body. The healthy blood vessel is attached above and below the blockage in the vertebral artery. Blood can then flow through the bypass to maintain proper blood flow.
Heart healthy habits will help keep blood vessels throughout your body in good shape. Lifestyle habits that can help include:
Eating more fruits, vegetables, and whole grains. Limit dietary salt and fat.
Quitting smoking—Talk to your doctor about the best ways to quit.
Increasing your consumption of fish.
Drinking alcohol only in moderation. This means 1-2 drinks per day.
Maintaining a healthy weight.
Checking your blood pressure frequently. Follow your doctor's recommendations for keeping it in a safe range.
Keeping chronic medical conditions under control. This includes high cholesterol and diabetes.
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