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Figure-of-eight model of reentry. Isochronal activation map during monomorphic reentrant ventricular tachycardia occurring in the surviving epicardial layer
overlying an infarction. Recordings were obtained from the epicardial surface of a canine heart 4 days after ligation of the left anterior descending coronary
artery. Activation isochrones are drawn at 20-ms intervals. The reentrant circuit has a characteristic figure-of-eight activation pattern. Two circulating
wavefronts advance in clockwise and counterclockwise directions, respectively, around two zones (arcs) of conduction block (heavy solid lines). The
epicardial surface is depicted as if the ventricles were unfolded following a cut from the crux to the apex. A three-dimensional diagrammatic illustration of
the ventricular activation pattern during the reentrant tachycardia is shown in the lower panel. END, endocardium; EPI, epicardium; LV, left ventricle; RV,
Source: Chapter 38. Mechanisms of Cardiac Arrhythmias and Conduction Disturbances, Hurst's The Heart, 13e
right ventricle. Reproduced with permission from El-Sherif N. Reentry revisited. PACE. 1988;11:1358.
Citation: Fuster V, Walsh RA, Harrington RA. Hurst's The Heart, 13e; 2011 Available at: http://mhmedical.com/ Accessed: May 10, 2017
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