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Figure 5 Recordings obtained during programmed stimulation in sinus rhythm (baseline cycle length S1–S1, 500 ms; coupling interval S1–S2, 190 ms) at bipole 9/10 of the pacing catheter (Patient #11). Recordings, abbreviations and catheter position as in Figure 4. In this example, occurrence of a functional conduction block at the CT resulted at the posterior right atrium in a pulse propagation from high to low (arrow).
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