What impact does fever have on stroke outcomes?

What impact does fever have on stroke outcomes?

• A. Fever has no effect on stroke outcomes.
• B. Fever worsens outcomes; prompt fever management improves prognosis.
• C. Fever always leads to infection.
• D. Fever improves neurological recovery.

Answer: (B)

Fever after a stroke worsens brain injury and prognosis because it raises the brain’s metabolic demands and amplifies injury processes. When body temperature climbs, the brain works harder to meet its needs, which can accelerate damage in the still-viable tissue around the stroke (the penumbra). Fever also promotes inflammatory cascades and edema, and can contribute to blood-brain barrier disruption, potentially expanding the area of damage and increasing the risk of complications. Because fever adds stress to an already injured brain, keeping temperature in the normal range and promptly treating fever helps reduce secondary injury and supports better functional recovery. This is why fever management—using antipyretics and noninvasive cooling when needed, while carefully evaluating for infection—is associated with improved prognosis after stroke. Fever isn’t synonymous with infection, and fever does not improve recovery on its own, so the best approach is proactive temperature control and addressing underlying causes rather than assuming fever should be left untreated or automatically blamed on infection.

Fever after a stroke worsens brain injury and prognosis because it raises the brain’s metabolic demands and amplifies injury processes. When body temperature climbs, the brain works harder to meet its needs, which can accelerate damage in the still-viable tissue around the stroke (the penumbra). Fever also promotes inflammatory cascades and edema, and can contribute to blood-brain barrier disruption, potentially expanding the area of damage and increasing the risk of complications.

Because fever adds stress to an already injured brain, keeping temperature in the normal range and promptly treating fever helps reduce secondary injury and supports better functional recovery. This is why fever management—using antipyretics and noninvasive cooling when needed, while carefully evaluating for infection—is associated with improved prognosis after stroke.

Fever isn’t synonymous with infection, and fever does not improve recovery on its own, so the best approach is proactive temperature control and addressing underlying causes rather than assuming fever should be left untreated or automatically blamed on infection.