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Hypomagnesemia (or hypomagnesaemia) is an electrolyte disturbance in which there is an abnormally low level of magnesium in the blood. Normal magnesium levels in humans fall between 1.7 - 2.2 mg/dL. Usually a serum level less than 1.7 mg/mL (0.7 mmol/L) is used as reference for hypomagnesemia (not hypomagnesia which refers to low magnesium content in food/supplement sources). The prefix hypo- means under (contrast with hyper-, meaning over). The root 'magnes' refers to magnesium. The suffix of the word, -emia, means 'in the blood.' Hypomagnesemia is not necessarily magnesium deficiency. Hypomagnesemia can be present without magnesium deficiency and vice versa. Note, however, that hypomagnesemia is usually indicative of a systemic magnesium deficit. Hypomagnesemia may result from a number of conditions including inadequate intake of magnesium, chronic diarrhea, malabsorption, alcoholism, chronic stress, and medications such as diuretic use among others.〔 〕 ==Signs and symptoms== Deficiency of magnesium causes weakness, muscle cramps, abnormal heart rhythms, increased irritability of the nervous system with tremors, athetosis, jerking, nystagmus, and an extensor plantar reflex. In addition, there may be confusion, disorientation, hallucinations, depression, epileptic fits, hypertension, a fast heart rate, and tetany. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hypomagnesemia」の詳細全文を読む スポンサード リンク
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