Stroke
Overview
A stroke occurs when the
blood supply to part of your brain is interrupted or reduced, preventing brain
tissue from getting oxygen and nutrients. Brain cells begin to die in minutes.
A stroke is a medical
emergency, and prompt treatment is crucial. Early action can reduce brain
damage and other complications.
The good news is that many
fewer Americans die of stroke now than in the past. Effective treatments can
also help prevent disability from stroke.
Symptoms
If you or someone you're
with may be having a stroke, pay particular attention to the time the symptoms
began. Some treatment options are most effective when given soon after a stroke
begins.
Signs and symptoms of
stroke include:
Trouble speaking and
understanding what others are saying. You may experience
confusion, slur your words or have difficulty understanding speech.
Paralysis or numbness of the
face, arm or leg. You may develop sudden numbness, weakness or paralysis in
your face, arm or leg. This often affects just one side of your body. Try to
raise both your arms over your head at the same time. If one arm begins to
fall, you may be having a stroke. Also, one side of your mouth may droop when
you try to smile.
Problems seeing in
one or both eyes. You may suddenly have blurred or
blackened vision in one or both eyes, or you may see double.
Headache. A
sudden, severe headache, which may be accompanied by vomiting, dizziness or
altered consciousness, may indicate that you're having a stroke.
Trouble walking.
You may stumble or lose your balance. You may also have sudden dizziness or a
loss of coordination.
When to see a doctor
Seek immediate medical
attention if you notice any signs or symptoms of a stroke, even if they seem to
come and go or they disappear completely. Think "FAST" and do the
following:
Face. Ask the person to
smile. Does one side of the face droop?
Arms. Ask the person to
raise both arms. Does one arm drift downward? Or is one arm unable to rise?
Speech. Ask the person to
repeat a simple phrase. Is his or her speech slurred or strange?
Time. If you observe any of
these signs, call 911 or emergency medical help immediately.
Call 911 or your local
emergency number right away. Don't wait to see if symptoms stop. Every minute
counts. The longer a stroke goes untreated, the greater the potential for brain
damage and disability.
If you're with someone you suspect
is having a stroke, watch the person carefully while waiting for emergency
assistance.
Causes
There are two main causes of
stroke: a blocked artery (ischemic stroke) or leaking or bursting of a blood
vessel (hemorrhagic stroke). Some people may have only a temporary disruption
of blood flow to the brain, known as a transient ischemic attack (TIA), that
doesn't cause lasting symptoms.
Ischemic stroke
This is the most common type
of stroke. It happens when the brain's blood vessels become narrowed or blocked,
causing severely reduced blood flow (ischemia). Blocked or narrowed blood
vessels are caused by fatty deposits that build up in blood vessels or by blood
clots or other debris that travel through your bloodstream and lodge in the
blood vessels in your brain.
Some initial research shows
that COVID-19 infection may be a possible cause of ischemic stroke, but more
study is needed.
Hemorrhagic stroke
Hemorrhagic stroke
occurs when a blood vessel in your brain leaks or ruptures. Brain hemorrhages
can result from many conditions that affect your blood vessels. Factors related
to hemorrhagic stroke include:
Uncontrolled high blood
pressure
Overtreatment with blood
thinners (anticoagulants)
Bulges at weak spots in your
blood vessel walls (aneurysms)
Trauma (such as a car
accident)
Protein deposits in blood
vessel walls that lead to weakness in the vessel wall (cerebral amyloid
angiopathy)
Ischemic stroke leading to
hemorrhage
A less common cause of
bleeding in the brain is the rupture of an abnormal tangle of thin-walled blood
vessels (arteriovenous malformation).
Transient ischemic
attack (TIA)
A transient ischemic attack
(TIA) — sometimes known as a ministroke — is a temporary period of symptoms
similar to those you'd have in a stroke. A TIA doesn't cause permanent damage. It
is caused by a temporary decrease in blood supply to part of your brain, which
may last as little as five minutes.
Like an ischemic stroke, a
TIA occurs when a clot or debris reduces or blocks blood flow to part of your nervous
system.
Seek emergency care even if
you think you've had a TIA because your symptoms got better. It's not possible
to tell if you're having a stroke or TIA based only on your symptoms. If you've
had a TIA, it means you may have a partially blocked or narrowed artery leading
to your brain. Having a TIA increases your risk of having a full-blown stroke
later.
Risk factors
Many factors can increase
your stroke risk. Potentially treatable stroke risk factors include:
Lifestyle risk factors
Being overweight or obese
Physical inactivity
Heavy or binge drinking
Use of illegal drugs such as
cocaine and methamphetamine
Medical risk factors
High blood pressure
Cigarette smoking or
secondhand smoke exposure
High cholesterol
Diabetes
Obstructive sleep apnea
Cardiovascular disease,
including heart failure, heart defects, heart infection or abnormal heart
rhythm, such as atrial fibrillation
Personal or family history
of stroke, heart attack or transient ischemic attack
COVID-19 infection requires
more research
Other factors
associated with a higher risk of stroke include:
Age — People 55 or older
have a higher risk of stroke than do younger people.
Race — African Americans
have a higher risk of stroke than do people of other races.
Sex — Men have a higher risk
of stroke than women. Women are usually older when they have strokes, and
they're more likely to die of strokes than are men.
Hormones — Use of birth
control pills or hormone therapies that include estrogen increases risk.
Complications
\
A stroke can sometimes cause
temporary or permanent disabilities, depending on how long the brain lacks
blood flow and which part was affected. Complications may include:
Paralysis or loss of
muscle movement. You may become paralyzed on one side
of your body, or lose control of certain muscles, such as those on one side of
your face or one arm.
Difficulty talking or
swallowing. A stroke might affect control of the
muscles in your mouth and throat, making it difficult for you to talk clearly,
swallow or eat. You also may have difficulty with language, including speaking
or understanding speech, reading, or writing.
Memory loss or thinking
difficulties. Many people who have had strokes experience some memory loss.
Others may have difficulty thinking, reasoning, making judgments and
understanding concepts.
Emotional problems.
People who have had strokes may have more difficulty controlling their
emotions, or they may develop depression.
Pain.
Pain, numbness or other unusual sensations may occur in the parts of the body
affected by stroke. For example, if a stroke causes you to lose feeling in your
left arm, you may develop an uncomfortable tingling sensation in that arm.
Changes in behavior and
self-care ability. People who have had strokes may become more withdrawn. They
may need help with grooming and daily chores.
Prevention
Knowing your stroke
risk factors, following your doctor's recommendations and
adopting a healthy lifestyle are the best steps you can take to prevent a
stroke. If you've had a stroke or a transient ischemic attack (TIA), these
measures might help prevent another stroke. The follow-up care you receive in the
hospital and afterward also may play a role.
Many stroke prevention
strategies are the same as strategies to prevent heart disease. In general,
healthy lifestyle recommendations include:
Controlling high
blood pressure (hypertension). This is one of the most
important things you can do to reduce your stroke risk. If you've had a stroke,
lowering your blood pressure can help prevent a subsequent TIA or stroke.
Healthy lifestyle changes and medications are often used to treat high blood
pressure.
Lowering the amount
of cholesterol and saturated fat in your diet.
Eating less cholesterol and fat, especially saturated fat and trans fats, may
reduce the buildup in your arteries. If you can't control your cholesterol
through dietary changes alone, your doctor may prescribe a cholesterol-lowering
medication.
Quitting tobacco use.
Smoking raises the risk of stroke for smokers and nonsmokers exposed to
secondhand smoke. Quitting tobacco use reduces your risk of stroke.
Managing diabetes.
Diet, exercise and losing weight can help you keep your blood sugar in a
healthy range. If lifestyle factors don't seem to be enough to control your
diabetes, your doctor may prescribe diabetes medication.
Maintaining a healthy
weight. Being overweight contributes to other
stroke risk factors, such as high blood pressure, cardiovascular disease and
diabetes.
Eating a diet rich in
fruits and vegetables. A diet containing five or
more daily servings of fruits or vegetables may reduce your risk of stroke. The
Mediterranean diet, which emphasizes olive oil, fruit, nuts, vegetables and
whole grains, may be helpful.
Exercising regularly.
Aerobic exercise reduces your risk of stroke in many ways. Exercise can lower
your blood pressure, increase your levels of good cholesterol, and improve the
overall health of your blood vessels and heart. It also helps you lose weight,
control diabetes and reduce stress. Gradually work up to at least 30 minutes of
moderate physical activity — such as walking, jogging, swimming or bicycling —
on most, if not all, days of the week.
Drinking alcohol in
moderation, if at all. Heavy alcohol consumption
increases your risk of high blood pressure, ischemic strokes and hemorrhagic
strokes. Alcohol may also interact with other drugs you're taking. However,
drinking small to moderate amounts of alcohol, such as one drink a day, may
help prevent ischemic stroke and decrease your blood's clotting tendency. Talk
to your doctor about what's appropriate for you.
Treating obstructive sleep
apnea (OSA). Your doctor may recommend a sleep study if you have symptoms of
OSA — a sleep disorder that causes you to stop breathing for short periods
repeatedly during sleep. Treatment for OSA includes a device that delivers
positive airway pressure through a mask to keep your airway open while you
sleep.
Avoiding illegal
drugs. Certain street drugs, such as cocaine and
methamphetamine, are established risk factors for a TIA or a stroke.
Preventive
medications
If you've had an ischemic
stroke or TIA, your doctor may recommend medications to help reduce your risk
of having another stroke. These include:
Anti-platelet drugs.
Platelets are cells in your blood that form clots. Anti-platelet drugs make
these cells less sticky and less likely to clot. The most commonly used
anti-platelet medication is aspirin. Your doctor can help you determine the
right dose of aspirin for you.
Your doctor might also
consider prescribing Aggrenox, a combination of low-dose aspirin and the
anti-platelet drug dipyridamole to reduce the risk of blood clotting. After a
TIA or minor stroke, your doctor may give you aspirin and an anti-platelet drug
such as clopidogrel (Plavix) for a period of time to reduce the risk of another
stroke. If you can't take aspirin, your doctor may prescribe clopidogrel alone.
Anticoagulants.
These drugs reduce blood clotting. Heparin is fast acting and may be used
short-term in the hospital.
Slower-acting warfarin
(Coumadin, Jantoven) may be used over a longer term. Warfarin is a powerful
blood-thinning drug, so you'll need to take it exactly as directed and watch
for side effects. You'll also need to have regular blood tests to monitor
warfarin's effects.
Several newer blood-thinning medications
(anticoagulants) are available for preventing strokes in people who have a high
risk. These medications include dabigatran (Pradaxa), rivaroxaban (Xarelto),
apixaban (Eliquis) and edoxaban (Savaysa). They're shorter acting than warfarin
and usually don't require regular blood tests or monitoring by your doctor.
These drugs are also associated with a lower risk of bleeding complications.
Jan Ricks Jennings, MHA, LFACHE
Senior Consultant
Senior Management Resources, LLC
JanJenningsBlog.Blogspot.com
412.913.0636 Cell
724.733.0509 Office
October 30, 2021