What is an indication of the V1 lead monitoring?

The V1 lead is positioned in the fourth intercostal space, just right of the sternum, and is primarily used to provide valuable insights into the heart's electrical activity, particularly relating to the right ventricle and the conduction system of the heart.

When monitoring with the V1 lead, it is particularly effective for identifying ventricular arrhythmias, which can manifest as various abnormal rhythms originating from the ventricles. Additionally, V1 is also capable of detecting ST segment changes, which can signal ischemia or other cardiac conditions.

Thus, both the detection of ventricular arrhythmias and the observation of ST segment changes are important indications for using the V1 lead. This multifaceted utility of the V1 lead makes it an essential tool in cardiac monitoring, supporting the determination that both indications are represented in the correct answer.