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Background:
Posterior circulation stroke may rarely be associated with occlusive disease in the
anterior circulation, such as in the context of a direct (fetal) origin of the posterior
cerebral artery (PCA) from the internal carotid artery (ICA), or in the presence of
a persistent trigeminal artery. Carotid dissection is an increasingly recognized cause
of anterior circulation ischemia. It is possible that in the setting of certain cerebral
hemodynamics, embolism from carotid dissection could cause PCA infarction via a patent
posterior communicating artery. Case Description: We report the MR and MR angiography findings of cerebral dynamics whereby a patient
presents with posterior circulation symptoms from anterior circulation pathology:
left ICA dissection with subsequent left PCA territory infarction. Conclusions: Cerebral hemodynamics may allow PCA infarction from carotid disease even in the
absence of a fetal PCA origin. This report also broadens the spectrum of stroke associated
with carotid dissection.
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Article info
Publication history
Accepted:
August 1,
1997
Received:
March 4,
1997
Identification
Copyright
© 1998 National Stroke Association. Published by Elsevier Inc.
