Henry Ford Hospital Medical Journal


A case of life-threatening cardiac arrhythmia associated with magnesium deficiency is described. The patient had no history of any cardiac disease, was not taking any medication and had no other accompanying electrolyte disorder. His arrhythmia was refractory to conventional treatment but responded to parenteral magnesium therapy. The role of hypomagnesemia in the predisposition to cardiac arrhythmia is discussed. To our knowledge, there are only two well-documented cases of ventricular irritability which responded to magnesium as the sole treatment. As awareness of such a relationshp increases and magnesium determinations become more available, this entity may be more commonly recognized, and the modality of therapy further substantiated.