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Optical mapping of 500 ms pacing in a beating heart. Vm traces are shown for the 9 numbered markers in Fig. 3b. A vertical red line shows the current video position in time. White dots indicate depolarization and repolarization of the tissue encircled by each marker. Frame rate is 1/10 real time. Only cyan frames are shown. Activation wavefronts are visible as slightly darker shadows propagating across the heart. (MPEG, 9.3 MB) .
