These ECG changes are seen in <img src=" />
Electrocardiographic changes in hypokalemia include broad flat T waves, ST depression, prominent U waves (best seen in the precordial leads) and QT prolongation; these are most marked when serum K+ is <2.7 mmol/L. Ref: Harrison 19e pg: 307
Hyponatremia
Hypernatremia
Hypokalemia
Hyperkalemia
Fluid and electrolytes