Which CNS manifestations are common in exertional heat stroke requiring urgent cooling?

Which CNS manifestations are common in exertional heat stroke requiring urgent cooling?

• A. Dizziness only.
• B. Confusion, agitation, ataxia, seizures, coma.
• C. Headache with no neurological signs.
• D. Nausea without mental status change.

Answer: (B)

Exertional heat stroke causes severe disruption of brain function when core temperature becomes dangerously high, so the CNS signs you see are intense and progressive. The most indicative manifestations requiring urgent cooling are confusion or agitation (altered mental status), along with more focal or severe symptoms like ataxia, seizures, and ultimately coma. These reflect the brain’s response to extreme heat and potential cerebral edema, neurotransmitter disturbances, and metabolic stress—clinical red flags that mandate immediate cooling and aggressive management. Dizziness can occur with heat exposure, but it alone doesn’t define the CNS involvement seen in exertional heat stroke. A simple headache without neurological signs isn’t specific for heat stroke with CNS impairment, and nausea without mental status change signals autonomic illness rather than the critical CNS dysfunction described.

Exertional heat stroke causes severe disruption of brain function when core temperature becomes dangerously high, so the CNS signs you see are intense and progressive. The most indicative manifestations requiring urgent cooling are confusion or agitation (altered mental status), along with more focal or severe symptoms like ataxia, seizures, and ultimately coma. These reflect the brain’s response to extreme heat and potential cerebral edema, neurotransmitter disturbances, and metabolic stress—clinical red flags that mandate immediate cooling and aggressive management.

Dizziness can occur with heat exposure, but it alone doesn’t define the CNS involvement seen in exertional heat stroke. A simple headache without neurological signs isn’t specific for heat stroke with CNS impairment, and nausea without mental status change signals autonomic illness rather than the critical CNS dysfunction described.