What characteristic makes Lead II particularly useful in ECG readings?

Lead II is particularly useful in ECG readings because it provides a clear view of the P waves, which represent atrial depolarization. This lead is positioned such that it captures electrical activity traveling through the heart in a way that makes the P waves more pronounced and easier to identify. The significance of P waves lies in their association with atrial activity, and a strong representation in Lead II allows clinicians to assess atrial enlargement or other atrial conditions effectively.

The other options refer to different aspects of cardiac physiology or ECG interpretation that may not specifically relate to Lead II’s primary utility. While Lead II does not measure heart rate directly, it can help calculate it through the analysis of the rhythm, and it is not designed to measure pressure metrics like left ventricular pressure. Additionally, capturing right atrial activity is more effectively done with leads that are positioned to specifically target that area, making Lead II's advantage in displaying strong P waves particularly valuable for diagnosing atrial irregularities.