Question

The nurse obtains a new order to infuse 20 mEq of potassium chloride IV piggyback for a client with a serum potassium of 3.2 mEq/L (3.2 mmol/L). While reviewing the client's cardiac monitor, which ECG finding best indicates that the infusion of potassium should be stopped?

A
Tall, peaked T waves Correct Answer (Blank)
B
Shortened PR interval
C
Narrowed QRS complex
D
Prominent U waves

Answer 1

The ECG finding indicating to stop the infusion of potassium is tall, peaked T waves, a sign of hyperkalemia which could lead to severe cardiac issues.

Step-by-step explanation:

The ECG finding that best indicates the infusion of potassium should be stopped is tall, peaked T waves. These are associated with hyperkalemia, a condition where the blood potassium levels are too high. In the context of administering intravenous potassium chloride (KCI), close monitoring of the patient's serum potassium level and cardiac function is crucial to avoid hyperkalemia, which can lead to life-threatening cardiac dysrhythmias and other complications.

Potassium plays a significant role in cardiac electrical activity, affecting the action potential of cardiac cells. When potassium becomes excessive in the body, it can cause a range of ECG changes. Tall, peaked T waves are one of the earliest signs of hyperkalemia on an ECG. If these appear during an IV potassium infusion, this generally indicates that the infusion should be stopped to prevent further elevation of potassium levels which can compromise cardiac function and potentially lead to cardiac arrest.