In which location are leads V1 and V2 positioned?

Leads V1 and V2 are positioned over the septal wall of the heart, which is crucial for assessing the electrical activity of the right and left ventricles, particularly the interventricular septum. In a standard 12-lead ECG, lead V1 is placed in the fourth intercostal space at the right sternal border, while lead V2 is positioned in the fourth intercostal space at the left sternal border. This positioning allows for effective monitoring of the electrical impulses that travel through the septum, making it highly relevant in diagnosing conditions such as myocardial infarction that may impact this area. Accurate placement of these leads is vital for a proper interpretation of the heart's electrical activity and for identifying issues within the septal region specifically.