Ischemic stroke

Definition

An ischemic stroke occurs when a blood clot blocks or narrows an artery leading to the brain, resulting in reduced blood flow and oxygen to brain tissue. This can cause rapid loss of brain function and requires immediate medical intervention.

5 Must Know Facts For Your Next Test

1. Ischemic strokes account for approximately 87% of all stroke cases.
2. Common treatments include anticoagulant drugs like warfarin, antiplatelet agents such as aspirin, and thrombolytic drugs like alteplase.
3. Risk factors include hypertension, diabetes, smoking, and high cholesterol.
4. Symptoms often include sudden numbness or weakness, especially on one side of the body; confusion; difficulty speaking; and vision problems.
5. Time is critical: early administration of thrombolytic therapy can significantly improve outcomes if given within three hours of symptom onset.

Review Questions

• What percentage of strokes are ischemic?
• Name two common types of medications used to treat ischemic strokes.
• Why is timely administration of thrombolytic therapy crucial in treating an ischemic stroke?

Related terms

Hemorrhagic Stroke:

A type of stroke caused by bleeding in the brain due to a ruptured blood vessel.

Thrombus:

A blood clot that forms in a blood vessel and remains there, potentially causing blockages.

Embolus: A blood clot or other debris that travels through the bloodstream and lodges in a vessel, causing obstruction.