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Figure 2 Measurement of conduction velocity. The propagation map and the virtual electrograms demonstrate the measurement of longitudinal conduction velocity in Case 6. Propagation of the activation wavefront is shown on the left. The surface distance (D) is measured between the first and the last virtual locations. On the right, the virtual unipolar electrograms are displayed. Time interval (T) between the first and the last peak negative deflections in the virtual unipolar electrograms is measured. The conduction velocity is calculated using the surface distance divided by time interval (D/T).
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