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ECG changes in hypokalaemia

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Hypokalaemia can cause:

  • flattened T waves
  • ST segment depression
  • prolonged QT interval
  • tall U waves
  • atrial arrythmias
  • ventricular tachycardia or ventricular fibrillation and torsade de pointes.

Note:

  • ECG changes seen in hypokalaemia is not reliable since some severe hypokalaemic patients may not exhibit these changes (1)

Click here for an example ECG and further information

Reference:

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