hyperkalemia AND hypokalemia sx and ECG

potassium falls below 3 mmol/l, the ECG often demonstrates

  • Flattening of the T waves
  • ST depression
  • QT prolongation
  • Prominent U waves.

Patients are at increased risk of ventricular ectopics, torsades de pointes and ventricular tachycardia.

Other constitutional symptoms associated with hypokalaemia of less than 3.0 mmol/l include

  • Tiredness
  • General weakness
  • Muscle pain
  • Constipation.



 malaise, palpitations

muscle weakness;

mild hyperventilation may indicate a compensatory response to metabolic acidosis

ECG shows :

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