ECG changes in Hypokalemia are?: (A) Tall T wave, (B) Poor P wave, (C) Sho QT interval, (D) Presence of U wave
Answer is D. Electrocardiographic changes in hypokalemia include broad flat T waves, ST depression, u wave and QT prolongation. These are most marked when serum K+ is <2.7 mmol/L. (reference: harrisons principles of internal medicine,19E page-307)