Importance of magnesium chloride repletion after myocardial infarction.

Data pertinent to the role of magnesium deficits in coronary artery disease and myocardial infarction are reviewed. Results of clinical, laboratory and epidemiologic studies indicate an association between magnesium deficiency and a poor prognostic outcome in patients who have had myocardial infarction. It therefore appears to be a reasonable prophylactic measure to monitor closely magnesium status in patients with coronary heart disease and other patients at risk of acute myocardial infarction, and to supplement with magnesium chloride when clinically necessary. In addition, recent studies provide supportive evidence that supplementation of magnesium chloride may reduce the incidence of fatal and nonfatal arrhythmias after an infarct.