一位護理師照護高血鉀病人，應監測哪項心電圖變化？

高血鉀（Hyperkalemia）會影響心肌細胞的靜止膜電位，導致再極化過程加速，進而在心電圖（ECG）上呈現特徵性變化。隨著血鉀升高，心電圖演變順序通常為：T波高尖（Tall, peaked T waves）、PR間期延長、QRS波變寬，嚴重時可能導致心室顫動或心搏停止。護理師必須熟悉此進程，因為這是預測致命性心律不整的早期警訊。

Hyperkalemia affects cardiac conduction by altering the resting membrane potential, typically resulting in tall, peaked T waves on an ECG. This is an early warning sign of potentially fatal arrhythmias, distinguishing it from hypokalemia which presents with flattened T waves or prominent U waves.