Which lead is located at the midaxillary line?

The lead that is located at the midaxillary line is V6. In the placement of electrodes for a standard 12-lead ECG, V6 is positioned at the horizontal level of V4 and V5 but is specifically located on the midaxillary line. This means that V6 is placed typically on the left side of the body, in the space between the fifth and sixth ribs, where it can capture information from the lateral aspect of the heart effectively. This position is crucial for obtaining accurate readings of the electrical activity of the heart, particularly when assessing conditions that affect the lateral wall, such as certain types of myocardial infarctions or other cardiac conditions.

Other leads, like V4, V5, and V3, have specific placements but do not lie directly on the midaxillary line, distinguishing them from V6 in terms of their anatomical locations on the chest. V4, for instance, is placed in the fifth intercostal space at the left midclavicular line, whereas V5 is located anterior to V6 and is placed at the same horizontal level as V4, but more towards the front of the body. V3 is placed between V2 and V4 and is not near the midaxillary