Separation or abnormal spacing between arterial layers or segments, often related to arterial wall degeneration or rupture.
From 'arteria' (artery) combined with Greek 'diastasis' (separation or standing apart), a pathological term developed to describe arterial wall integrity loss from 19th-century medicine.
Arteries have multiple layers like an onion—when arteriodiastasis happens, those layers are separating and it's a sign of serious trouble like dissection, which is a medical emergency!
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