<prompt> ECG finding in Hypokalemia isAbsent P waveProminent U waveST elevationT wave tnting  <response>: Prominent U wave: 439-Davidson 21stHyperkalemiaHypokalemia1. Earliest changes increased T wave amplitude- Early changes flattening or inversion of T wave 2. Prolong PR interval and QRS duration- Prominent U wave3. AV conduction delay, loss of P wave- ST segment depression, prolong QU interval4. Sin wave pattern progressive widening of the QRS complex merging with T wave- Prolonged PR interval, decreased voltage and widening of the QRS complex Prolong QT interval - Hypocalcemia, SAH Short QT interval - Hypercalcemia, digitalis glycosides 