Where should an electrode be placed for V2 in a 12-Lead ECG?

The correct placement for the V2 electrode in a 12-Lead ECG is in the fourth intercostal space on the left side of the sternum. This specific location is crucial for accurately capturing the electrical activity of the heart, particularly for assessing the anterior and septal walls of the left ventricle. By placing V2 in this area, it enhances the detection of abnormalities in these regions, which are important for diagnosing various cardiac conditions.

Proper electrode placement helps ensure that the readings obtained are reliable and effective for identifying any potential issues such as ischemia or infarction. The fourth intercostal space is just below the fourth rib, which is easily identifiable and provides a consistent landmark for proper electrode positioning.

In contrast, the other options do not reflect the correct anatomical location for the V2 electrode, which could lead to misinterpretation of the heart's electrical activity. Therefore, option B stands out as the correct and appropriate answer for V2 electrode placement.