ECG findings in Hypokalemia

  T wave flattens.

 
U wave amplitude increases. The prominent U waves may become taller than the T waves.

      When the U wave merges with the T wave, it may give the appearance of QT interval prolongation .

 
ST segment depression.



Clinical significance

  In patients under Digoxin therapy, hypokalemia predisposes to Digoxin induced arrhythmias.

  In patients with Long QT Interval Syndrome (LQTS), hypokalemia predisposes to Torsades de Pointes.