What type of stroke is caused by a vascular blockage?

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An ischemic stroke is caused by a blockage of blood vessels in the brain, which leads to reduced blood flow and hence, deprivation of oxygen and nutrients to brain tissue. This type of stroke is most commonly due to a clot that obstructs the flow of blood either through the narrowing of arteries or the formation of clots within the blood vessels.

In contrast, a hemorrhagic stroke occurs when a blood vessel ruptures, leading to bleeding within the brain or surrounding areas. The term "ischemic penumbra" refers to the area around the core of the infarct (the damaged tissue) that is at risk but not yet irreversibly damaged; it’s an important concept in stroke treatment strategies but does not describe a type of stroke itself. "Hemorrhagic penumbra" is not a standard term used in medical terminology.

Thus, identifying ischemic stroke as the correct answer highlights the specific cause—vascular blockage—that characterizes this type of stroke. Understanding these distinctions is crucial for effective assessment and management in emergency medical situations.

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