Types of Stroke
There are two main types of stroke: ischemic stroke and hemorrhagic stroke. Ischemic strokes occur when a blood vessel carrying oxygen and nutrients to the brain is blocked by a clot. Hemorrhagic strokes occur when a blood vessel in the brain ruptures, causing bleeding in or around the brain.
Ischemic strokes account for approximately 87% of all strokes and can be caused by various factors, including:
Atherosclerosis: a buildup of plaque in the arteries that can narrow or block blood flow to the brain.
Cardioembolism: a blood clot that forms in the heart and travels to the brain, blocking blood flow.
Small vessel disease: damage to the small blood vessels in the brain, often due to high blood pressure or diabetes.
Hemorrhagic strokes account for approximately 13% of all strokes and can be caused by various factors, including:
High blood pressure: the most common cause of hemorrhagic stroke, as it can weaken blood vessel walls, making them more prone to rupture.
Aneurysms and arteriovenous malformations (AVMs): abnormal blood vessels in the brain that can rupture and cause bleeding.
Trauma: a severe blow to the head that can cause bleeding in or around the brain.
Transient ischemic attacks (TIAs), also known as "mini-strokes," are a temporary blockage of blood flow to the brain that can cause similar symptoms to a stroke. TIAs are often warning signs of an impending stroke and should be taken seriously.
To summarize, there are two main types of stroke: ischemic stroke and hemorrhagic stroke. Each type has different causes, and recognizing the warning signs of stroke and seeking medical attention promptly is crucial for preventing long-term brain damage or disability. In our next post, we will discuss the various treatments for stroke and their effectiveness.