Methods
Bi-atrial mapping of AF propagation was undertaken and variability of
activation patterns quantified up to a duration of 30-seconds(s). The
frequency of each pattern was quantified at each vertex of the chamber
over 2 separate 30s recordings prior to ablation and
R2 calculated to quantify spatial stability. Regions
with the highest frequency were identified at increasing time durations
and compared to the result over 30s using Cohen’s kappa. Properties of
regions with the most stable patterns were assessed during sinus rhythm
and extrastimulus pacing.