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Figure 4 Epicardial electrograms during reentry; same format as Figure 2. White arrows indicate direction of proposed wavefront propagation. Horizontal bars on electrograms mark activation times at each site for the measured (red) and noninvasively reconstructed (blue) signals. Green electrograms at the bottom are recorded from the epicardial sock at about the same locations as rod-tip electrograms G to J. LV = left ventricle; RV = right ventricle.
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