Definition
A stroke is the sudden and severe rupture or blockage of a blood vessel that deprives part of the brain of its normal blood supply, causing loss of consciousness, paralysis and other signs.
How Strokes Affect Dogs
The effects of a “stroke” are caused by the lack of oxygen delivery. The most common signs of stroke in dogs are head tilt, difficulty walking, loss of balance, uncontrollable circling, sudden loss of vision, loss of bowel control and abrupt behavioral changes.
Causes of Strokes in Dogs
There is no genetic, age, sex or breed predisposition in dogs regarding strokes. The most common underlying medical conditions which can lead to stroke in dogs include brain tumors, Cushing’s disease, diabetes, heart disease, kidney disease and thyroid disease. In some rare cases, internal parasites can contribute to strokes. A stroke can occur when a fragment of fat or spinal cartilage becomes dislodged and trapped in the brain. Strokes can also occur in dogs whose brains did not develop normally or in dogs with inherited blood clotting disorders. Accidental injuries involving a strong blow to the head can also cause a stroke, and poisons such as rodenticides have been known to cause strokes in dogs as well. In most cases, the actual cause of a stroke will never be definitively diagnosed.
Preventing Strokes in Dogs
There is no known way to prevent strokes in dogs.
Special Notes
Continual care and supervision are extremely important for dogs suffering from strokes. As long as the stroke is diagnosed and treated in a timely manner, a full recovery is possible.