Know the Facts About African Americans and Stroke

Heart disease and stroke are major health risks for all people. But African Americans are at particularly high risk.
Consider this:

• Blacks have almost twice the risk of first-ever strokes compared to whites.
• Blacks have higher death rates for stroke compared to whites.
• The prevalence of high blood pressure in African Americans in the United States is the highest in the world.
• Among non-Hispanic blacks age 20 and older, 62.9 percent of men and 77.2 percent of women are overweight or obese.
• In 2001, 27.7 percent of black or African-Americans only, used any tobacco product. Heavy cigarette smoking approximately doubles a person's risk for stroke when compared to light smokers.
• Black women have higher prevalence rates of high blood pressure, obesity, physical inactivity and diabetes than white women.

Unlike a stroke, when a TIA occurs, the blood clot resolves itself and there's no permanent injury. When a stroke occurs and part of your brain dies from lack of blood flow, the part of the body it controls is affected. Strokes can cause paralysis, affect language and vision, and cause other problems.

You Have The Power

The burden of stroke is greater among African Americans than in any other group. In fact, not only do blacks have almost twice the risk of first-ever stroke compared with whites, but blacks 35-54 years old have four times the relative risk for stroke.

But there is hope. You have the power to fight stroke - and win! By following these three simple steps, you can help protect yourself against stroke.

• Reduce your chances of having a stroke by learning the risk factors and working with your doctor to help reduce your risk.
• Recognize the warning signs of a stroke. Stroke is a medical emergency. Every second counts!
• Respond by calling 9-1-1 immediately if you or someone close to you is having warning signs of stroke. Then check the time. When did the first symptom start? You'll be asked this important question later.

It's time to act now! Take the Power to End Stroke Pledge, commit to living a healthier lifestyle and use your power to stop stroke today.

http://www.powertoendstroke.org/stroke-african-americans.html

What is a stroke?

A stroke, or cerebrovascular accident (CVA), occurs when blood supply to part of the brain is disrupted, causing brain cells to die. When blood flow to the brain is impaired, oxygen and glucose cannot be delivered to the brain. Blood flow can be compromised by a variety of mechanisms.

Blockage of an artery

• Narrowing of the small arteries within the brain can cause a so-called lacunar stroke, (lacune=empty space). Blockage of a single arteriole can affect a tiny area of brain causing that tissue to die (infarct).
  
  
• Hardening of the arteries (atherosclerosis) leading to the brain. There are four major blood vessels that supply the brain with blood. The anterior circulation of the brain that controls most motor, activity, sensation, thought, speech, and emotion is supplied by the carotid arteries. The posterior circulation, which supplies the brainstem and the cerebellum, controlling the automatic parts of brain function and coordination, is supplied by the vertebrobasilar arteries.

If these arteries become narrow as a result of atherosclerosis, plaque or cholesterol, debris can break off and float downstream, clogging the blood supply to a part of the brain. As opposed to lacunar strokes, larger parts of the brain can lose blood supply, and this may produce more symptoms than a lacunar stroke.

• Embolism to the brain from the heart. In situations in which blood clots form within the heart, the potential exists for small clots to break off and travel (embolize) to the arteries in the brain and cause a stroke.

Rupture of an artery (hemorrhage)

• Cerebral hemorrhage (bleeding within the brain substance). The most common reason to have bleeding within the brain is uncontrolled high blood pressure. Other situations include aneurysms that leak or rupture or arteriovenous malformations (AVM) in which there is an abnormal collection of blood vessels that are fragile and can bleed.

What causes a stroke?

Blockage of an artery

The blockage of an artery in the brain by a clot (thrombosis) is the most common cause of a stroke. The part of the brain that is supplied by the clotted blood vessel is then deprived of blood and oxygen. As a result of the deprived blood and oxygen, the cells of that part of the brain die. Typically, a clot forms in a small blood vessel within the brain that has been previously narrowed due to a variety of risk factors including:

• high blood pressure (hypertension),
  
  
• high cholesterol,
  
  
• diabetes, and
  
  
• smoking.

Embolic stroke

Another type of stroke may occur when a blood clot or a piece of atherosclerotic plaque (cholesterol and calcium deposits on the wall of the inside of the heart or artery) breaks loose, travels through open arteries, and lodges in an artery of the brain. When this happens, the flow of oxygen-rich blood to the brain is blocked and a stroke occurs. This type of stroke is referred to as an embolic stroke. For example, a blood clot might originally form in the heart chamber as a result of an irregular heart rhythm, such as occurs in atrial fibrillation. Usually, these clots remain attached to the inner lining of the heart, but occasionally they can break off, travel through the blood stream, form a plug (embolism) in a brain artery, and cause a stroke. An embolism can also originate in a large artery (for example, the carotid artery, a major artery in the neck that supplies blood to the brain) and then travel downstream to clog a small artery within the brain.

Cerebral hemorrhage

A cerebral hemorrhage occurs when a blood vessel in the brain ruptures and bleeds into the surrounding brain tissue. A cerebral hemorrhage (bleeding in the brain) can cause a stroke by depriving blood and oxygen to parts of the brain. Blood is also very irritating to the brain and can cause swelling of brain tissue (cerebral edema). Edema and the accumulation of blood from a cerebral hemorrhage increases pressure within the skull and causes further damage by squeezing the brain against the bony skull.

Subarachnoid hemorrhage

In a subarachnoid hemorrhage, blood accumulates in the space beneath the arachnoid membrane that lines the brain. The blood originates from an abnormal blood vessel that leaks or ruptures. Often this is from an aneurysm (an abnormal ballooning out of the wall of the vessel). Subarachnoid hemorrhages usually cause a sudden, severe headache and stiff neck. If not recognized and treated, major neurological consequences, such as coma, and brain death will occur.

Vasculitis

Another rare cause of stroke is vasculitis, a condition in which the blood vessels become inflamed.

Migraine headache

There appears to be a very slight increased occurrence of stroke in people with migraine headache. The mechanism for migraine or vascular headaches includes narrowing of the brain blood vessels. Some migraine headache episodes can even mimic stroke with loss of function of one side of the body or vision or speech problems. Usually, the symptoms resolve as the headache resolves.

http://www.medicinenet.com/stroke/article.htm

The City of Austin issues a proclamation recognizing the Black Church Week of Prayer for the Healing of AIDS.  This annual event is the flagship event sponsored by the Black Faith-based Health Initiative and brings together community leaders, pastors, health agencies, non-profit groups and citizens from all over the greater Austin metropolitan area. (March 2006)

Pictured (from left to right): Austin Mayor Will Wynn, Pastors Raymond Bryant, Kennedy Young, Assistant Director of the Austin Health Department Shannon Jones (speaking), Pastors Roy Jones, Isaac Grant, Marcus Freeman and City Manager Toby Futrell.