• Decrease GI motility

• Neuromuscular (<2.5 mEq/l):

  • Lethargy,

  • Weakness,

  • Decreased DTRs

  • Rhabdomyolysis.

• Cardiac/EKG        

  • Dysrhythmias (various)

  • Decreased. T,

  • ST depression,

  • Prolongation of QRS,

  • Increased U

• 30% also have hypomagnesemia

• Estimate Deficit:

  • Approximately 100 mEq deficit for each 0.5 mEq/L decrease in serum K

• Oral replacement preferred (>2.5 mEq/l, no EKG changes and asymptomatic)

• IV replacment

• Rate not > 40 mEq/hr

• Cardiac monitor

• Concentration not > 10 mEq per 100cc

(Caution in presence of renal insufficiency / failure)

• Dependent upon:

• Magnitude

• Cause

• Underlying illnesses

• Response to ED therapy