What are the inferior leads in 12-lead ECG?

In a 12-lead electrocardiogram (ECG), the inferior leads are:

1. Lead II: This lead records the electrical activity between the right arm (RA) and the left leg (LL) electrodes. It provides a view of the inferior aspect of the heart, particularly the right ventricle and the inferior regions of the left ventricle.

2. Lead III: This lead records the electrical activity between the left arm (LA) and the left leg (LL) electrodes. Similar to lead II, it also provides information about the inferior surface of the heart, including the right ventricle and the inferior regions of the left ventricle.

These leads are particularly useful in detecting abnormalities or injuries in the inferior wall of the heart, such as inferior myocardial infarction (heart attack). Changes in the ST-segment, T-wave, or QRS complex in the inferior leads can indicate underlying cardiac issues in this region.