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Hippocampus: A “Forgotten” Border Zone of Brain Ischemia
Author(s) -
Walha Kamel,
Ricolfi Fréderic,
Béjot Yannick,
nt Michel,
Ben Salem Douraied
Publication year - 2013
Publication title -
journal of neuroimaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.822
H-Index - 64
eISSN - 1552-6569
pISSN - 1051-2284
DOI - 10.1111/j.1552-6569.2011.00610.x
Subject(s) - medicine , hippocampal formation , ischemia , circle of willis , hippocampus , dissection (medical) , perfusion , cardiology , carotid arteries , internal carotid artery , posterior cerebral artery , anatomy , middle cerebral artery
BACKGROUND Hippocampus is selectively susceptible to ischemic damage and it could be, in some conditions, considered as a border zone of brain ischemia.RESULTS We illustrate this concept with three cases of hippocampal diffusion‐weighted imaging (DWI) restrictions secondary to a carotid artery dissection with an ipsilateral fetal posterior cerebral artery (PCA) in two cases and to global brain hypoperfusion consequent to a cardiac arrest in the last case.CONCLUSION The hypoperfusion induced by a cardiac arrest or an internal carotid dissection with an incomplete circle of Willis promotes hippocampal ischemia in the territories of the anterior choroidal artery and the longitudinal terminal segments of the hippocampal arteries.