A nurse is reviewing the EKG strip of a client who has prolonged vomiting. Which of the following abnormalities on the client's EKG should the nurse interpret as a sign of hypokalemia?

Rationale:A. An inverted P wave is not specifically associated with hypokalemia; it can be seen in various other conditions.B. An elevated ST segment is not characteristic of hypokalemia; it is more associated with other conditions such as myocardial ischemia.C. A wide QRS complex can occur with hypokalemia but is also seen in other conditions.D. An abnormally prominent U wave is a classic sign of hypokalemia and can be seen in EKG changes associated with low potassium levels.