ECG abnormalities that may be induced by hypoglycemia are

  QT interval prolongation

  T wave flattening

  Sinus tachycardia

  Sinus bradycardia

  ST segment depression



References

  Diabetologia 2010;53:2036-41.

  Diabetologia 2009;52:42-5.

  Jpn Circ J 1998;62:142-5.