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Figure 5 Entrainment of Adenosine-Insensitive Focal Atrial Tachycardia From Patient #5
Pacing from the early site accelerates the tachycardia, and the post-pacing interval (PPI) approximates the tachycardia cycle length (TCL). Note that the morphology of some electrograms in the coronary sinus (CS) are different during pacing, suggesting activation by an altered wave front. These findings are consistent with pacing from the "outer loop" of the re-entrant circuit. ABL = ablation; d = distal; LA = left atrium; p = proximal; Stim = stimulus marker.
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