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Figure 7 Electrograms from the decapolar catheters that were placed in the left atrium (LA) and the right atrium (RA). Right atrium rapid burst atrial pacing for 2 s did not terminate the atrial fibrillation. The LA electrograms showed no alterations in pattern or frequency in response to attempted burst pace termination from the RA. The channel labeled RA3 was selected for pacing (pacing artifact during the pacing train is not uniformly displayed in the RA3 channel because of limitations of the physiologic recorder software).
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