This PowerPoint slide presentation is intended for a wide EP audience. It reviews the factors that must be present for cardiac reentry to occur, explains the concept of the “excitable gap,” demonstrates how pacing can be used to “take over” a circuit (entrainment of the circuit), and shows how bipolar electrogram recordings are interpreted in the context of entrainment pacing to identify the size and location of a reentry circuit. The post-pacing interval concept is discussed in great detail, both as a concept and in a real patient case example.

Author: Dr. Joshua Cooper