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Syncope

Syncope is a topic covered in the Diagnosaurus.

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Etiology

Cardiac

  • Arrhythmia (ventricular tachycardia, supraventricular tachycardia, sick sinus syndrome, sinus bradycardia, sinus arrest, atrioventricular block)
  • Aortic stenosis
  • Myocardial infarction
  • Hypertrophic obstructive cardiomyopathy (HOCM)
  • Pulmonary hypertension, pulmonary embolism, pulmonary stenosis
  • Atrial myxoma
Noncardiac
  • Orthostatic or postural hypotension
    • Hypovolemia
    • Drugs, eg, beta-blockers, calcium channel blockers, vasodilators, diuretics
    • Autonomic insufficiency, eg, diabetes, adrenal insufficiency, spinal cord lesion, Guillain-Barré syndrome, chronic idiopathic orthostatic hypotension
  • Situational, eg, micturition, defecation, cough, swallow
  • Carotid sinus hypersensitivity

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Last updated: December 1, 2014

Citation

Zeiger, Roni F.. "Syncope." Diagnosaurus, 4th ed., McGraw-Hill Education, 2014. Emergency Central, emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope.
Zeiger RF. Syncope. Diagnosaurus. 4th ed. McGraw-Hill Education; 2014. https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope. Accessed April 25, 2019.
Zeiger, R. F. (2014). Syncope. In Diagnosaurus. Available from https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope
Zeiger RF. Syncope [Internet]. In: Diagnosaurus. McGraw-Hill Education; 2014. [cited 2019 April 25]. Available from: https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Syncope ID - 114554 A1 - Zeiger,Roni F, Y1 - 2014/12/01/ BT - Diagnosaurus UR - https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope PB - McGraw-Hill Education ET - 4 DB - Emergency Central DP - Unbound Medicine ER -