<prompt> ECG change suggestive of hypokalemia is:Absent P waveDelta waveU waveGlobal ST elevation  <response>: Ans: c U waveRef: Harrison, 17th ed. pg. 282Hypokalemia is associated with ST depression, prolonged PR interval, flattened or Inverted T waves,Prominent U waves and rarely S - A block.Hypokalaemia Hyperkalaemia- ST depression- Increased T wave amplitude- Flattened or inverted- Peaked T wavesT wave- Prominent U wave- Prolonged PR interval- Prolonged P-R interval- Prolonged QRS duration- Rarely S-A block- AV conduction delay- Loss of P waves- Sine wave pattern- Ventricular fibrillation or asystoleSome more ECG patterns:Delta wave - WPW syndrome Osborn waves -Hypothermia Camel hump sign Epsilon waves -ARVD Arrythmogenic RV dysplasia QT prolongation -Hypocalcaemia Short QT -Hypercalcaemia 