Personalized Antithrombotic Strategies in Patients with Atrial Fibrillation Following Transcatheter Aortic Valve Replacement

<b>Background:</b> Atrial fibrillation (AF) is prevalent in patients undergoing transcatheter aortic valve replacement (TAVR). However, the optimal antithrombotic strategy tailored to individual patient profiles remains unclear. This study aims to evaluate the outcomes of personalized antithrombotic regimens in patients with AF after TAVR. <b>Methods:</b> We enrolled 121 AF patients who underwent TAVR from 2009 to 2023. Patients were grouped into seven groups based on individualized post-procedural antithrombotic regimens. The regimens included the following: single antiplatelet therapy (SAPT) + direct oral anticoagulant (DOAC) (n = 44, 36.3%); DOACs only (n = 25, 20.6%), SAPT + warfarin (n = 17, 14%); dual antiplatelet therapy (DAPT) (n = 13, 10.7%); warfarin only (n = 8, 6.6%); DAPT + warfarin (n = 7, 5.8%); and DAPT + DOACs (n = 7, 5.8%). The study outcomes included incidences of strokes or transient ischemic attacks (TIAs), major bleeding, and survival. <b>Results:</b> The median follow-up was 27 months. The incidence of stroke, TIA, or major bleeding was similar among the seven treatment groups. However, a trend toward a higher rate of stroke was observed in the triple regimen containing warfarin (28.6%); also, the highest rate of major bleeding was observed in the warfarin-only group (25%). Survival for patients discharged and placed under various antithrombotic regimens did not differ significantly despite some numerical variations being present across the groups, with the lowest mortality reported with SAPT + warfarin (7%) and the highest with DAPT + warfarin (57%). <b>Conclusions:</b> This study highlights the outcomes related to stroke, major bleeding, and mortality across personalized antithrombotic regimens in patients with AF after TAVR. While no statistically significant differences were observed, findings emphasize the need for further large-scale studies to define optimal personalized antithrombotic strategies based on individual patient characteristics.