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镁离子影响心脏酶的活性以及心肌和血管平滑肌中钙和钾的浓度。镁能减少心律失常,改善心肌代谢,对儿茶酚胺引起的心肌坏死有保护作用。镁在小肠吸收,由肾排泄或再吸收。如果病人有吸收不良病变,如肾功能障碍或长期胃管吸引减压时都应想到低镁血症。胰岛素和儿茶酚胺失衡也可导致镁离子缺乏。病人在使用噻嗪类利尿剂、洋地黄以及长期应用氨基糖甙药物时也要查血镁含量。
Magnesium ions affect cardiac enzyme activity as well as calcium and potassium concentrations in myocardium and vascular smooth muscle. Magnesium can reduce arrhythmia, improve myocardial metabolism, myocardial protection caused by catecholamines have a protective effect. Magnesium is absorbed in the small intestine, excreted or reabsorbed by the kidneys. Hypomagnesemia should be considered if the patient has poor absorption of the disease, such as renal dysfunction or long-term gastric tube suction decompression. Imbalance between insulin and catecholamines can also result in magnesium deficiency. Patients in the use of thiazide diuretics, digitalis and long-term use of aminoglycoside drugs also check the blood magnesium content.