What ECG finding is often associated with hyperkalemia?

Hyperkalemia, or elevated potassium levels in the blood, has distinct effects on the electrocardiogram (ECG). Both tented T waves and widened QRS complexes are characteristic findings associated with this condition.

Tented T waves appear as tall, peaked waves following the QRS complex. This is one of the earliest ECG changes seen in hyperkalemia. The increased potassium levels affect the myocardial cells' repolarization, leading to this distinctive appearance of the T waves.

Widened QRS complexes often occur as hyperkalemia progresses. Increased potassium levels can slow down the conduction through the ventricles, resulting in an elongated QRS duration. A widening QRS signifies a delay in the depolarization of the ventricles, which can be a precursor to more serious arrhythmic events.

Given that both tented T waves and widened QRS complexes are significant findings associated with hyperkalemia, the correct response appropriately identifies that these two features together are a hallmark of this electrolyte disturbance.