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
- General weakness
- Muscle pain
mild hyperventilation may indicate a compensatory response to metabolic acidosis
ECG shows :