PO-697-05 COMPREHENSIVE EVALUATION OF ATRIAL FIBRILLATION RECURRENCE POST CATHER ABLATION THROUGH TEMPORAL PATTERNS

Abstract

After catheter ablation (CA), patients demonstrate varying temporal patterns of atrial fibrillation (AF) events. Some patients may experience a high AF Burden during the entire follow up period, but others demonstrate varying temporal patterns of sinus and AF. We aim to demonstrate a comprehensive report after an AF CA through the temporal patterns of the rhythms during follow up. Mobile electrocardiogram (ECG) recording devices was used to collect 30-second recordings every day for one year follow up from 852 patients after an CA. In our analysis, we identify the temporal patterns of sinus and AF rhythms amongst our patients. We calculated the AF burden by the number of AF recordings over the number of days. To extract reliable temporal information, we include 473 patients who have submitted recordings for over 200 days. In our analysis, we plotted a temporal report of sinus and AF rhythms over time, and identified the first date of the recurrence event, the number of times the patient’s rhythm converted from one rhythm type to another, AF burden over the first 30 days and the rest of the following period. The AF burden measured after the 30 days had a mean of 12.7%, while the average burden during the first 30 days of the follow up was 29.4%. The study population demonstrated an average of 45 days to the first recurrence event and converted from one rhythm to another 22 times. As none of the temporal features demonstrated a linear relationship to the AF Burden measured after 30 days, we used Spearman’s correlation to measure the relevance of each variable. As a result, the burden during the first 30 days had a correlation of 0.454, the number of days to the first recurrence event had 0.065, and the number of conversions had 0.812, indicating that only the number of switches had a high correlation with the AFIB burden after 30 days. Low correlation from the AF burden from the first 30 days and the number of days to the first recurrence event to the burden of the remaining follow up period indicates that a single AF recurrence event is not a reliable indicator to evaluate the outcome of an CA. Furthermore, the high correlation between the number of times a patient switched from one rhythm to another to the remaining burden is a strong indicator that a more continuous measurement of heart rhythm is necessary.