Which statement best summarizes the relationship between stroke type and edema?

Which statement best summarizes the relationship between stroke type and edema?

• A. Cerebral edema and increased intracranial pressure are major deleterious effects regardless of stroke type.
• B. Edema only occurs with hemorrhagic strokes.
• C. Edema only occurs with ischemic strokes.
• D. Edema never occurs.

Answer: (A)

Edema leading to increased intracranial pressure is a major deleterious effect that can occur with any type of stroke. In ischemic stroke, lack of blood flow causes energy failure and pump dysfunction in brain cells, leading to cellular swelling (cytotoxic edema) and, as the blood–brain barrier begins to break down, fluid leakage into the interstitial space (vasogenic edema). In hemorrhagic stroke, blood vessels rupture and the resulting hematoma plus the inflammatory response promote swelling around the injured area, contributing to mass effect and raised intracranial pressure. In both scenarios, the swelling worsens brain injury by compressing tissue and reducing cerebral perfusion, making edema a common and harmful consequence across stroke types. The other options imply edema is exclusive to one type or nonexistent, which doesn’t fit how edema develops in either ischemic or hemorrhagic stroke.

Edema leading to increased intracranial pressure is a major deleterious effect that can occur with any type of stroke. In ischemic stroke, lack of blood flow causes energy failure and pump dysfunction in brain cells, leading to cellular swelling (cytotoxic edema) and, as the blood–brain barrier begins to break down, fluid leakage into the interstitial space (vasogenic edema). In hemorrhagic stroke, blood vessels rupture and the resulting hematoma plus the inflammatory response promote swelling around the injured area, contributing to mass effect and raised intracranial pressure. In both scenarios, the swelling worsens brain injury by compressing tissue and reducing cerebral perfusion, making edema a common and harmful consequence across stroke types. The other options imply edema is exclusive to one type or nonexistent, which doesn’t fit how edema develops in either ischemic or hemorrhagic stroke.