How Does Canine Stroke Occur?
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Biology of a Canine Stoke
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Disruption of the blood flow to the brain causes a stroke. Blood provides oxygen needed for the brain to function. It also removes waste products from cellular activity. Lack of blood flow causes cells to die from either lack of oxygen or buildup of waste. The brain is unable to produce or transfer the electrical impulses necessary for the body to move, react or do the other things associated with life.
Disruption of blood flood can occur because of thrombosis, a narrowing of the artery or embolism, a blockage of a blood vessel caused by a clot or other debris. A hemorrhage can cause damage by leaking blood into the brain because of a burst blood vessel.
Symptoms
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Walking in circles, falling, loss of balance and sudden blindness are symptoms of stroke. Strokes in dogs differs from humans. Human symptoms include paralysis and drooping of the face and slurred speech.
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Causes
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Hypertension (high blood pressure) is a main cause of canine stroke. Kidney disease, Cushing's disease and diabetes are all illnesses that can lead to hypertension, causing narrowing of the artery or burst blood vessels. Massive bleeding in the brain can occur after ingestion of rat poison or even infection of the lungworm parasite.
Testing
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Veterinarians use CT scans and MRIs to determine whether a dog has suffered a stroke.
Treatment
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Outcome is dependent upon the cause of the stroke and the area of the brain that is damaged. There is no specific treatment for a canine stroke. Prevention of more strokes is important and so is good nursing care. Helping the dog relearn to walk or other functions may alleviate the symptoms of the stroke. Sadly, if damage to the brain is too great, euthanasia may be the most humane option.
Warning
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Canine stroke is life threatening. If you suspect your dog has suffered a stroke, seek immediate care by a veterinarian.
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