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Figure 1 The reentrant wave fronts initiated by epicardial breakthrough with a line of conduction block parallel to the epicardial fiber orientation (data from heart no. 1). Panels A to K are selected frames from the dynamic display of the activation patterns during VF. Panel L shows the trajectory of the tip of the reentrant wave fronts, demonstrating the meandering nature of the core. Numbers 1 and 2 indicate the first and second cycles of reentry. The time of each frame is shown in parentheses above the panels. The beginning of the data acquisition was taken as time zero. The myocardial fiber orientation is displayed by the double-headed arrow at the right lower border of the figure.
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