Hypokalemia as a result of Anorexia Nervosa and Diarrhea

Hypokalemia ECG


  • Sinus rhythm
  • Right Axis Deviation
  • P waves consistent with Right Atrial Enlargement (RAE) – reported to occur with Hypokalemia
  • T waves with down-up morphology with long QT interval because of the presence of U waves (seen in Hypokalemia)

This young woman had Anorexia Nervosa and weighed 90 lbs (40kg) and had Diarrhea from daily intake of 30 laxative tablets which resulted in Hypokalemia. Her serum potassium was 1.6 mmol/L.