A congenital narrowing or stenosis of the aorta, a birth defect that restricts blood flow from the heart.
From Greek 'aortē' (aorta) combined with 'arktos' (narrowness/strictness), a medical term coined to describe the anatomical condition of aortic narrowing.
Aortarctia is one of those rare medical conditions where the name itself tells you exactly what's wrong—it's Greek for 'aortic narrowness,' and babies born with this need surgery to survive, making it one of the conditions where understanding the name helps you grasp the severity!
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