Diagnosaurus
Syncope
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
- 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 RFR. Syncope. Diagnosaurus. McGraw-Hill Education; 2014. https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope. Accessed October 31, 2025.
Zeiger, R. F. (2014). Syncope. In Diagnosaurus (4th ed.). McGraw-Hill Education. https://emergency.unboundmedicine.com/emergency/view/Diagnosaurus/114554/all/Syncope
Zeiger RFR. Syncope [Internet]. In: Diagnosaurus. McGraw-Hill Education; 2014. [cited 2025 October 31]. 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 -
