Ver el código de «Heat exhaustion»

==Background==
Results from exposure to excessive heat or exposure to extreme temperature for prolonged period of time.
*Can result from exposure to [[heat wave]]
*Predicted to increase due to increasing climate temperatures

===Etiology<ref>Waters T. Heat Emergencies In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 7th ed. McGraw Hill Medical. 2011: 1339</ref>===
*Occurs via water depletion or sodium depletion or combination 
*Water depletion occurs in elderly and persons working in hot environments
*Salt depletion occurs when fluid losses are replaced with hypotonic solutions

==Clinical Features<ref>Waters T. Heat Emergencies In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 7th ed. McGraw Hill Medical. 2011: 1339</ref>==
[[File:PMC3040629 ehp-119-a81f1 2.png|thumb|Man with signs of heat exhaustion, including copious sweating.]]
Known heat exposure with temperature 37-40C with:
*[[Tachycardia]]
*Sweating (especially when associated with exercise)
*[[Nausea]] or [[vomiting]]
*[[Headache]]
*[[Fatigue]], [[weakness]]
*[[Dizziness]]
*Orthostatic [[hypotension]] with ''normal'' mental status
*Mentation is normal (in contrast to [[heatstroke]])

==Differential Diagnosis==
{{Template:Heat Emergencies}}

==Evaluation==
===Workup===
*Evidence of hemoconcentration
*May be [[hyponatremic]], isotonic or [[hypernatremic]]
**Depending on ratio of fluid and electrolyte loss to intake

===Diagnosis===
*Typically a clinical diagnosis

==Treatment<ref>Waters T. Heat Emergencies In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 7th ed. McGraw Hill Medical. 2011: 1339</ref>==
#Removal from heat-stressed environment
#[[volume repletion|Volume]] and [[electrolyte repletion]]
#*Oral versus IV depending on severity
#Aggressive cooling to 39C if patient does not respond to 30min of fluid replacement

==Disposition<ref>Waters T. Heat Emergencies In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 7th ed. McGraw Hill Medical. 2011: 1339</ref>==
*Majority of patients can be discharged
*Consider admission in patients with CHF or severe electrolyte disturbances
*If not treated properly, may evolve to [[Heat Stroke]]

==Complications==
*[[Rhabdomyolysis]]

==See Also==
*[[Heat Stroke]]
*[[Heat Emergencies]]

==References==
<references/>
[[Category:Environmental]]