Question

When performing a posterior EKG, which of the following is the correct location for placement of lead V8?

a) On the left arm
b) On the right arm
c) On the right lower abdomen
d) On the left lower abdomen

Answer 1

The correct location for lead V8 during a posterior EKG is on the posterior aspect of the chest wall, usually over the left scapula and at the same horizontal level as V6.

Step-by-step explanation:

When performing a posterior EKG, the correct location for placement of lead V8 is not on the limbs but on the posterior aspect of the chest. Specifically, lead V8 is placed at the same horizontal level as V6 (the midaxillary line) but on the posterior aspect of the chest wall, usually over the left scapula. It is important to remember that standard placement of ECG leads involves four electrodes on the limbs and six on the chest for a 12-lead EKG setup. The posterior leads such as V7, V8, and V9 are additional leads placed to capture electrical activity from the posterior wall of the heart, and these are not standard but may be used for more detailed diagnostics when a heart condition affecting the rear portion of the heart is suspected.