As a medical expert with a focus on cardiology, I can provide you with an overview of the electrocardiogram (ECG) changes associated with hypokalemia, which is a condition characterized by low levels of potassium in the blood. Hypokalemia can lead to several ECG changes, particularly when the serum potassium level falls below 3 mEq/L. The most notable ECG changes include: 1. ST Segment Depression: The ST segment may appear flattened or sagging, which can be indicative of hypokalemia. 2. T Wave Changes: The T waves may become flattened, inverted, or even biphasic, which is a significant ECG finding in hypokalemic patients. 3. U Wave Formation: Hypokalemia can result in the appearance of U waves, which are small deflections after the T wave that are not typically present in a normal ECG. Additionally, severe hypokalemia can lead to more serious ECG changes such as: - Prolongation of the QT interval - Potential for developing a torsades de pointes, which is a type of ventricular tachycardia that can be life-threatening. It's important to note that ECG changes are not always present in mild cases of hypokalemia, and the severity of the ECG changes can vary depending on the degree of potassium depletion and the presence of other electrolyte imbalances. read more >>

Clinical signs include muscle weakness, cramping, fasciculations, paralytic ileus, and when hypokalemia is severe, hypoventilation, and hypotension. ECG changes typically occur when serum potassium is < 3 mEq/L, and include ST segment sagging, T wave depression, and U wave elevation.read more >>