Abstract P388: Trends in Cardiac Monitoring After Ischemic Stroke and Transient Ischemic Attack: The Florida Puerto Rico Atrial Fibrillation Stroke Study

Introduction: Prolonged cardiac monitoring after cryptogenic stroke reveals a cardiac cause in up to 30% of patients; however, practice patterns for monitoring vary widely. We sought to evaluate overall and race/ethnic trends in the rate of ECG monitoring and types of cardiac monitoring performed after ischemic stroke and transient ischemic attack (TIA) across a network of hospitals in Florida and Puerto Rico(PR). Methods: We identified 46,878 ischemic stroke and TIA cases with data on ECG monitoring in the Florida Stroke Registry from 2016-18. Univariate analysis was performed to determine the overall rate of ECG monitoring and the characteristics of patients who received cardiac surface monitoring ≤7days and >7days, and implantable cardiac monitoring. Multivariate logistic regression was performed to identify factors associated with the types of monitoring. Results: Overall, 39,333 (84%) patients admitted for stroke/TIA received ECG monitoring during hospital admission (mean age 71±14 years; 49% female; 63% white, 18% black, 15% FL-Hispanic, 4% PR-Hispanic). Compared to patients who received ECG monitoring, patients who did not were more likely to be younger (mean age 70±15 years), PR-Hispanic (24% vs 4.3%), and have TIA (13% vs 8%), Medicare (42% vs 35%), large vessel disease (14% vs 9%) and greater admission NIHSS (median score 5 vs 4). After adjustment, smokers and patients >80years were less likely to receive ECG monitoring overall (OR 0.95, 95% CI 0.9-0.99 for both). Black race was associated with receiving extended surface monitoring >7 days (OR 1.15, 95%CI 1.04-1.26), but negatively associated with implantable cardiac monitoring (OR 0.81, 95%CI 0.68-0.96). Patients with moderate/severe stroke had higher odds of extended surface monitoring >7days (OR 2.29, 95%CI 1.89-2.77), yet lower odds of implantable cardiac monitoring (OR 0.80, 95%CI 0.71-0.89). Conclusion: The majority of patients received ECG monitoring during hospital admission for stroke/TIA; however, significant differences were found with respect to age, race/ethnicity and stroke severity across the various types and duration of cardiac monitoring. Further research is needed to understand and address the underlying drivers of these differences.