Types of Strokes

Ischemic Stroke = (80-90% of strokes)

Pathology & Symptoms: Ischemic strokes are caused by either a blockage or narrowing of the arteries in the brain, which leads to reduced blood flow. The reduced blood flow can lead to a blockage, which is usually a result of a thrombus or an embolus. A thrombus is a blood clot that has formed in the brain’s arteries. An embolus is a clot that is formed somewhere else in the body and travels to the brain. 

Result: When the blood flow in the brain is blocked, the neurons in the affected are become deprived of oxygen in nutrients, leading to cell death. 

Hemorrhagic Stroke (10-20% of strokes)

Pathology & Symptoms: Hemorrhagic Strokes are caused by blood vessel ruptures in the brain. This can lead to an intracerebral hemorrhage or a subarachnoid hemorrhage. An intracerebral hemorrhage is when bleeding occurs inside the brain. A subarachnoid hemorrhage is when bleeding occurs in the space around the brain. 

Result: Having blood be bled out inside the brain or around the space of the brain can lead to increased intracranial pressure. This can overcomplicate and further compromise blood flow.

Risk Factors