What does "Small collateral vein" 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.
A small collateral vein is a tiny blood vessel that helps in blood circulation. It's like a backup system that your body uses when the main routes for blood flow are blocked or damaged. These veins connect two larger veins together, allowing blood to bypass a blocked area and keep flowing to where it needs to go. They are especially important in conditions where blood flow is restricted, such as heart disease.
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