Abnormally increased tension or tone in blood vessels, causing them to be overly constricted.
From Greek 'angeion' (vessel) + 'hyper' (excessive) + 'tonos' (tension/tone). This medical term describes a pathological state where blood vessel muscles remain too contracted, used in cardiovascular medicine.
This condition is like having blood vessels stuck in permanent muscle tension—imagine if your arm muscles couldn't relax; your vessels feel the same stress, affecting blood flow throughout your body.
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