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First Guidelines Issued to Prevent Stroke in Women
Updated: Monday, February 10 2014, 05:04 PM EST
Just as heart attack symptoms may differ between men and women, so do stroke risks.
Now, the American Heart Association has issued its first guidelines for preventing strokes in women. They focus on birth control, pregnancy, depression and other risk factors that women face uniquely or more frequently than men do.
The advice applies to patients like Denise Miller, who suffered a stroke last year that fooled doctors at two northeast Ohio hospitals before it was finally diagnosed at the Cleveland Clinic. She was 36 and had no traditional risk factors.
"There was nothing to indicate I was going to have a stroke," other than frequent migraines with aura - dizziness or altered senses such as tingling, ringing ears or sensitivity to light, Miller said.
These headaches are more common in women and the new guidelines issued Thursday flag them as a concern. Miller recovered but has some lingering numbness and vision problems.
Each year, nearly 800,000 Americans have a new or recurrent stroke, which occurs when a blood vessel to the brain is blocked by a clot or bursts. Stroke is the third-leading cause of death for women and the fifth-leading cause for men. The key to surviving one and limiting disability is getting help fast, and recognizing symptoms such as trouble speaking, weakness or numbness in one arm, or drooping on one side of the face.
Stroke risk rises with age, and women tend to live longer than men. Women are more likely to be living alone when they have a stroke, to have poorer recovery, and to need institutional care after one.
Certain stroke risks are more common in women - migraine with aura, obesity, an irregular heartbeat called atrial fibrillation, and metabolic syndrome - a combo of problems including blood pressure, cholesterol and blood sugar.
General guidelines for stroke prevention currently focus on controlling blood pressure and diabetes, quitting smoking, more exercise and healthy diets.
The new ones add gender-specific advice, said Dr. Cheryl Bushnell, stroke chief at Wake Forest Baptist Medical Center in Winston-Salem, N.C. She led the panel that wrote the guidelines, published in Stroke, a Heart Association journal.
BIRTH CONTROL PILLS: Women should be checked for high blood pressure before starting on oral contraceptives because the combination raises stroke risks. The risk is small but rises steeply in women ages 45 to 49. More than 10 million American women use birth control pills.
PREGNANCY: Strokes are uncommon during pregnancy but the risk is still higher, especially during the last three months and soon after delivery. The big worry is preeclampsia, dangerously high blood pressure that can cause a seizure and other problems.
"It doubles the risk of stroke later in life and it quadruples the risk of high blood pressure" after pregnancy, Bushnell said.
Women with a history of high blood pressure before pregnancy should be considered for low-dose aspirin (around 81 milligrams) after the first three months of pregnancy, and calcium supplements anytime, to lower the risk of preeclampsia, the guidelines say.
Pregnant women with very high blood pressure (160 over 110 and above) should be treated with medications, and treatment may be considered for those with moderately high blood pressure (150 to 159 over 100 to 109). Certain blood pressure medicines are not safe during pregnancy, the guidelines note.
ASPIRIN: It's usually recommended for anyone who has already had a stroke unless the stroke was caused by bleeding rather than a clot, or if bleeding risk is a concern, Bushnell said. Aspirin also is often recommended for people with diabetes to lower the risk of stroke and other problems.
A low-dose aspirin every other day "can be useful" to lower stroke risk in women 65 and older unless its benefit is outweighed by the potential for bleeding or other risks, the guidelines say.
MIGRAINES: Women are four times more likely to have migraines than men, and they often coincide with hormone swings. Migraines alone don't raise the risk of stroke, but ones with aura do. Using oral contraceptives and smoking raise this risk even more, so the guidelines urge stopping smoking.
IRREGULAR HEARTBEAT: Women over age 75 should be checked for atrial fibrillation. Doctors do this by taking a pulse or listening to the heartbeat.
MENOPAUSE: Hormone therapy should not be used to try to prevent strokes.
The new guidelines put women's issues "on the table" so more doctors talk about them, said Dr. Shazam Hussain, stroke chief at the Cleveland Clinic. "Gender does make a difference. The medical community has neglected it for some time."
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