Weakness or lack of muscular tone in blood vessels, leading to poor circulation or vascular insufficiency.
From Greek 'angeion' (vessel) + 'a-' (without) + 'sthenos' (strength). Medical term describing vessels that lack proper muscle tone and contractility.
When blood vessel walls lose their ability to contract and expand properly, it's like having pipes that can't squeeze—blood pools and circulation fails, which can cause everything from poor wound healing to chronic fatigue and cold hands and feet.
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