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ECG changes in hypokalemia

Authoring team

Hypokalaemia can cause the following EKG changes:

  • flattened T waves
  • ST segment depression
  • prolonged QT interval
  • tall U waves
  • atrial arrhythmias
  • ventricular tachycardia or ventricular fibrillation
  • 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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