<prompt> ECG of a patient with snake bite is shown below. What is the abnormality seen?HyperkalemiaHypokalemiaMyocarditisBigemini  <response>: ECG changes typically occur when serum potassium is 3 mEqL, and include ST segment sagging, T wave depression, and U wave elevation. With marked hypokalemia, the T wave becomes progressively smaller and the U wave becomes increasingly larger . Ref Davidson 23rd edition pg 370 