Conclusions
RACT is a novel and promising marker of a potential right atrial flutter
circuit and thereby the propensity for clinical atrial flutter. A value
of 115.5 ms has a sensitivity and specificity of 92.7 and 93.0%
respectively for the diagnosis of typical atrial flutter. This simple
electrophysiologic marker presents opportunity for further study as a
marker of future AFL risk and potential utility of tricuspid isthmus
ablation at time of EP study.
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