PO-622-05 USE OF LOCAL ACTIVATION TIME HISTOGRAM ALGORITHM FOR DETERMINATION OF ARRHYTHMIA MECHANISM AND TO GUIDE ABLATION STRATEGY

Abstract

Differentiating focal from re-entrant arrhythmias is critical to ablation success. Activation mapping is often used to guide this determination, but accurate local activation time (LAT) annotation can be challenging, particularly in areas of abnormal voltage. The LAT histogram algorithm, which depicts point distribution over isochronal segments, may be helpful in characterizing arrhythmia mechanisms and identifying an optimal ablation strategy.