When assessing a patient with a stroke, which sign should alert the nurse to the possible presence of an embolic stroke?

• A. Sudden headache
• B. Transient vision loss
• C. Weakness on one side of the body
• D. Speech difficulties

Answer: (C)

The presence of weakness on one side of the body is a key clinical sign that can indicate an embolic stroke. An embolic stroke occurs when a blood clot forms away from the brain—commonly in the heart—and travels through the bloodstream to lodge in narrower brain arteries. This occlusion leads to an immediate loss of blood flow to the affected area of the brain, resulting in weakness or paralysis, often affecting one side of the body. This phenomenon, known as hemiparesis, is frequently observed in patients experiencing an embolic stroke.

While sudden headache, transient vision loss, and speech difficulties can also be associated with strokes, they do not specifically point to embolic strokes with the same level of specificity as unilateral weakness does. A sudden headache might suggest a hemorrhagic stroke, transient vision loss could indicate involvement of the visual pathways or could occur in various conditions, and speech difficulties can arise from many types of strokes, but the unilateral weakness is a classic manifestation tied closely to areas of brain damage caused by embolic events.