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Fig. 3 | Journal of Cardiovascular Magnetic Resonance

Fig. 3

From: Repaired coarctation of the aorta, persistent arterial hypertension and the selfish brain

Fig. 3

Variations of incomplete posterior Circle of Willis. Panels a to h show 3D MRA reconstructions of the Circle of Willis. PComm = posterior communicating artery; PCA = posterior cerebral artery. a Normal Circle of Willis. The PComms are indicated by arrows and precommunicating segment of the PCAs are marked by arrowheads. b Unilateral left PComm (arrow) and absent contralateral PComm (asterisk). c Bilateral absent PComms (asterisks). d Unilateral right foetal type PCA and severely hypoplastic ipsilateral precommunicating segment of the PCA (arrowhead). e Unilateral right foetal type PCA (arrow) and absent contralateral PComm (asterisk). f Unilateral left foetal type PCA (arrow), incomplete precommunicating segment of the left PCA (arrowhead) and absent right PComm (asterisk). g Bilateral foetal type PCAs with absent precommunicating segments of the posterior cerebral arteries (asterisks). h Bilateral foetal type PCAs (arrows) with absent precommunicating segment of right PCA (arrowhead)

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