How is the time of onset defined if the patient awakens with symptoms of stroke?

Updated: May 27, 2020
  • Author: Edward C Jauch, MD, MS, FAHA, FACEP; Chief Editor: Helmi L Lutsep, MD  more...
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If the patient awakens with symptoms, then the time of onset is defined as the time at which the patient was last seen to be without symptoms or last known normal time. Input from family members, coworkers, and bystanders may be required to help establish the exact time of onset, especially in right hemispheric strokes accompanied by neglect or left hemispheric strokes with aphasia.

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