<P> The speed at which potassium should be replaced depends on whether or not there are symptoms or abnormalities on an electrocardiogram . Potassium levels that are only slightly below the normal range can be managed with changes in the diet . Lower levels of potassium require replacement with supplements either taken by mouth or given intravenously . If given intravenously, potassium is generally replaced at rates of less than 20 mmol / hour . Solutions containing high concentrations of potassium (> 40 mmol / L) should generally be given using a central venous catheter . Magnesium replacement may also be required . </P> <P> Hypokalemia is one of the most common water--electrolyte imbalances . It affects about 20% of people admitted to hospital . The word "hypokalemia" is from hypo - means "under"; kalium meaning potassium, and - emia means "condition of the blood". </P> <P> Mild hypokalemia is often without symptoms, although it may cause elevation of blood pressure, and can provoke the development of an abnormal heart rhythm . Severe hypokalemia, with serum potassium concentrations of 2.5--3 meq / l (Nl: 3.5--5.0 meq / l), may cause muscle weakness, myalgia, tremor, and muscle cramps (owing to disturbed function of skeletal muscle), and constipation (from disturbed function of smooth muscle). With more severe hypokalemia, flaccid paralysis and hyporeflexia may result . Reports exist of rhabdomyolysis occurring with profound hypokalemia with serum potassium levels less than 2 meq / l . Respiratory depression from severe impairment of skeletal muscle function is found in many patients . </P> <P> Hypokalemia can result from one or more of these medical conditions: </P>

Which one of the following conditions is not a result of hypokalemia