Certified Emergency Nurse (CEN) Practice Test

The preferred placement for external transcutaneous pacing is anterior/posterior placement. This positioning enhances the delivery of electrical impulses through the heart by maximizing the surface area through which the pacing electricity flows. The anterior electrode is typically placed over the left precordium (chest area), and the posterior electrode is placed on the back, opposite the anterior electrode.

This configuration helps to align the electrical vector properly through the heart's conduction system, thereby improving the likelihood of capturing a rhythm in patients requiring pacing, such as those with bradycardia or certain types of heart blocks. Additionally, this placement can reduce the risk of discomfort for the patient, as it can be less irritating than other placements. Effective pacing is critical in emergency situations, so understanding the ideal electrode placement is essential for successful intervention.