Heat syncope: Difference between revisions
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==Background== | ==Background== | ||
*Variant of postural hypotension | *Variant of postural hypotension<ref>Waters T. Heat Emergencies In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 7th ed. McGraw Hill Medical. 2011: 1339</ref> | ||
**Results from combination of volume depletion, decreased vasomotor tone and peripheral vasodilatation | **Results from combination of volume depletion, decreased vasomotor tone and peripheral vasodilatation | ||
**Occurs in nonacclimatized patients during early stages of heat exposure (especially elderly) | **Occurs in nonacclimatized patients during early stages of heat exposure (especially elderly) | ||
== | ==Clinical Features== | ||
* | *Syncope in the setting of environmental heat exposure | ||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
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{{Syncope causes}} | {{Syncope causes}} | ||
==Diagnosis== | |||
*Diagnosis of exclusion | |||
==Management== | ==Management== | ||
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*[[Heat Emergencies]] | *[[Heat Emergencies]] | ||
== | ==References== | ||
<references/> | |||
[[Category:Environ]] | [[Category:Environ]] | ||
Revision as of 12:26, 26 August 2015
Background
- Variant of postural hypotension[1]
- Results from combination of volume depletion, decreased vasomotor tone and peripheral vasodilatation
- Occurs in nonacclimatized patients during early stages of heat exposure (especially elderly)
Clinical Features
- Syncope in the setting of environmental heat exposure
Differential Diagnosis
Environmental heat diagnoses
Syncope Causes
- Cardiovascular-mediated syncope
- Dysrhythmias:
- Cardiovascular disease
- Neurally mediated syncope
- Vasovagal:
- Fear, pain, emotion, valsalva, breath-holding spell
- Situational (associated with):
- Vasovagal:
- Orthostatic hypotension-mediated syncope:
- Volume depletion:
- Autonomic Dysreflexia
- Autonomic failure due to meds
- Other serious causes
- Stroke
- SAH
- TIA
- Vertebrobasilar Insufficiency
- Subclavian steal
- Heat syncope
- Hypoglycemia
- Hyperventilation
- Asphyxiation
- Seizure
- Narcolepsy
- Psychogenic (anxiety, conversion disorder, somatic symptom disorder)
- Toxic (drugs, carbon monoxide, etc.)
Diagnosis
- Diagnosis of exclusion
Management
- Remove pt from heat source
- Give PO or IV rehydration
Disposition
- Hospitalization usually not necessary
See Also
References
- ↑ Waters T. Heat Emergencies In: Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 7th ed. McGraw Hill Medical. 2011: 1339