病人診斷為低血鉀，護理師應優先評估下列哪項發現？

低血鉀（Hypokalemia）會導致心肌細胞膜電位不穩定，顯著增加心律不整（Cardiac dysrhythmia）的風險，這是低血鉀最致命的併發症。根據護理優先級，危及生命的生理問題（心臟功能）永遠排在第一位。雖然肌肉無力、腸蠕動減慢或抽筋也是低血鉀表現，但這些症狀通常不會在短時間內導致心跳停止，因此心電圖監測與心律評估是護理師最優先的責任。

Hypokalemia destabilizes the membrane potential of cardiac myocytes and significantly increases the risk of cardiac dysrhythmia, which is the most lethal complication of hypokalemia. According to nursing priorities, life-threatening physiological problems (cardiac function) always come first. Although muscle weakness, decreased intestinal motility, and cramping are also manifestations of hypokalemia, these symptoms usually do not lead to cardiac arrest in the short term; therefore, ECG monitoring and rhythm assessment are the nurse's highest priorities.