Question
The following ECG findings are seen in hypokalemia:
| A. | Increased PR interval with ST depression |
| B. |
Increased PR interval with peaked T wave |
| C. |
Prolonged QT interval with T wave inversion |
| D. |
Decreased QT interval with ST depression |
Show Answer
|
Correct Answer » C Explanation |
 |
C. Prolonged QT interval with T wave inversion
ECG Changes in Hypokalemia:
Hypokalemia(low serum potassiumcardiac repolarization.
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T wave inversion or flattening is an early sign of hypokalemia.
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Prolonged QT interval (technically due to prolonged QU interval) results from delayed ventricular repolarization.
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U waves may also appear (best seen in precordial leads), creating a prolonged apparent QT.
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These findings increase the risk of arrhythmias, especially ventricular ectopy or torsades de pointes.