[3 dangerous electrolyte disturbances: hyponatremia, hyperkalemia and hypomagnesemia]

Three cases of acute and potentially dangerous electrolyte disturbances provide a basis for discussion of selected aspects of pathogenesis, clinical manifestation and correction of certain electrolyte disorders (hyponatremia, hyperkalemia, hypomagnesemia). A case of diuretic-induced hyponatremia illustrates the controversy surrounding correction of this disorder. The regulatory mechanisms of transcellular potassium equilibrium are discussed with the help of a case of exercise-induced hyperkalemia. A separate case is dedicated to the discussion of the multiple causes and symptoms of magnesium depletion.