Which lead is typically placed at the left midclavicular line in the fifth intercostal space?

The lead that is typically placed at the left midclavicular line in the fifth intercostal space is Lead V4. This lead's placement is critical for assessing the electrical activity of the heart from the anterior perspective, especially related to the left ventricle and assessing for conditions like myocardial infarction.

In a standard 12-lead ECG setup, Lead V4 is positioned specifically at the fifth intercostal space, which is below the left nipple line, providing a crucial view of the heart’s electrical activity. Accurate placement is essential for effective monitoring and interpretation of results.

The other leads, while also important, are positioned differently: Lead V2 is located in the second intercostal space at the left sternal border, Lead V3 is placed between Lead V2 and Lead V4, and Lead V5 is positioned at the same horizontal level as V4 but at the anterior axillary line. Understanding the specific location of each lead is fundamental for correct ECG interpretation.