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. Author manuscript; available in PMC: 2010 Feb 12.
Published in final edited form as: Exp Physiol. 2009 Mar 6;94(5):563. doi: 10.1113/expphysiol.2008.044073

Figure 7. Post-shock Purkinje system activation determines isoelectric window.

Figure 7

A, the earliest endocardial activations following the 3.6 V cm−1 shock during the burst pacing protocol (BCL 130 ms) are induced by Purkinje strands. B, these activations propagate transmurally to appear as the first propagated postshock breakthrough on the epicardium that marked the end of IW. Black arrow shows the breakthrough location. C, postshock activations degrade into re-entry; rotors are seen on RV epicardium (left) and endocardium (right).