Click on image to view larger version.

Figure 6 Fast Atrial Pacing After Isolation

During pacing at 700 ms (86 beats/min) from the isolated atrial segment, the ventricles were activated after each pacing, with a fixed interval between the pacing spike and the ventricular activation, despite the fact that the right atrium was paced at 200 beats/min (which activated the left atrium as well). This suggests that there was complete conduction block from the right–left atria to the isolated tissue–ventricles. The recording format is the same as Figure 1. LVP = left ventricular pressure; other abbreviations as in Figure 5.