To diagnose hypokalemia via an ECG, look for distinct changes that signal low potassium levels. Key indicators include flattened or inverted T waves, which suggest abnormal ventricular repolarization. Prominent U waves, appearing after the T wave, are another sign of hypokalemia. Additionally, the ST segment may be depressed, and the QT interval can be prolonged, both of which heighten the risk of arrhythmias. Hypokalemia can also result in ectopic beats—irregular heartbeats originating outside the normal rhythm—and, in severe cases, lead to serious arrhythmias like ventricular fibrillation. Identifying these ECG changes is crucial for the prompt diagnosis and treatment of hypokalemia. Early intervention helps prevent complications and ensures patient safety. Analyzing the ECG for these specific abnormalities allows healthcare providers to administer appropriate treatment, manage symptoms effectively, and maintain cardiovascular health. Timely detection and correction of hypokalemia are vital for preventing adverse outcomes related to electrolyte imbalances.