Where is lead V1 placed on the patient's chest?

Lead V1 is placed in the fourth intercostal space at the right sternal border. This specific placement is crucial because it optimally captures the electrical activity of the heart, particularly the right ventricle and the interventricular septum. Proper placement of lead V1 ensures a clear representation of the electrical signals originating from these regions, which is important for diagnosing various cardiac conditions.

When positioned correctly, lead V1 can help in assessing conduction abnormalities, such as right bundle branch block, and can provide significant information regarding the presence of any anterior wall ischemia. Accurate lead placement is essential for obtaining a reliable 12-lead EKG, making knowledge of the correct anatomical landmarks pivotal for healthcare professionals interpreting cardiac patients' EKGs.