Transient global amnesia (TGA) is a clinical syndrome defined by the acute onset of profound anterograde amnesia (the inability to form new memories) lasting up to 24 hours (mean duration of symptoms 4-6 hours) in the absence of other neurologic deficits or changes in alertness and cognition.
TGA patients retain implicit and procedural memory (motor tasks and coordination), but struggle with delayed recall (ie, remembering something 5 minutes later).
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Upon completion of this article, you should be able to:
Define transient global amnesia and differentiate it from the most common mimics, based on clinical presentation.
List the features that should remove the transient global amnesia diagnosis from consideration and identify high-risk patients.
Counsel patients and their families about transient global amnesia and its benign implications.
Physician CME Information
Date of Original Release: August 1, 2016. Date of most recent review: July 10, 2016. Termination date: August 1, 2019.
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Credit Designation: EB Medicine designates this enduring material for a maximum of 4 AMA PRA Category 1 Credits™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.
ACEP Accreditation: Emergency Medicine Practice is approved by the American College of Emergency Physicians for 48 hours of ACEP Category I credit per annual subscription.
AAFP Accreditation: This Medical Journal activity, Emergency Medicine Practice, has been reviewed and is acceptable for up to 48 Prescribed credits by the American Academy of Family Physicians per year. AAFP accreditation begins July 1, 2015. Term of approval is for one year from this date. Each issue is approved for 4 Prescribed credits. Credit may be claimed for one year from the date of each issue. Physicians should claim only the credit commensurate with the extent of their participation in the activity.
AOA Accreditation: Emergency Medicine Practice is eligible for up to 48 American Osteopathic Association Category 2-A or 2-B credit hours per year.
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