What does "Collaterals from the left ACA" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
"Collaterals from the left ACA" refers to additional, secondary blood vessels that come from the left anterior cerebral artery, which is a major artery in the brain. These collateral vessels can form naturally over time or develop when the main artery is blocked, helping to ensure that blood flow to the brain is maintained. They act as a sort of backup system, rerouting blood around a blockage to prevent damage to the brain.
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