Abnormally low levels of calcium in the blood, typically below 8.5 mg/dL. Can cause muscle cramps, tingling, seizures, and potentially life-threatening heart problems.
From Greek 'hypo' (under/below), Latin 'calx' (lime/calcium), and Greek 'haima' (blood). Recognition of this condition became crucial with the development of major surgery in the early 20th century, when accidental parathyroid gland removal caused severe hypocalcemia.
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