Why must time of symptom onset be precisely determined in the assessment of posterior cerebral artery (PCA) stroke?

Updated: Jul 30, 2018
  • Author: Erek K Helseth, MD; Chief Editor: Helmi L Lutsep, MD  more...
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Time of symptom onset needs to be precisely determined, as this may determine eligibility for acute stroke therapies. Rigorous questioning of the patient, family, or witnesses is often needed to clarify symptom onset.

If the patient is seen within 6-8 hours of onset, consideration may be given to various acute stroke therapies, including intravenous (IV) or intra-arterial (IA) thrombolysis. Mechanical endovascular therapies, which are increasingly used for various intracranial large vessel occlusions, have been described and may be considered but are infrequently used for PCA occlusion.

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