Comparative analysis of vitamin K antagonists and direct oral anticoagulants for left ventricular thrombus management: a retrospective study utilising TriNetX

Abstract Introduction Despite progress in cardiovascular medicine, guidelines for addressing left ventricular thrombus (LVT) remain limited. Furthermore, incorporating oral anticoagulants into dual antiplatelet therapy for acute myocardial infarction (MI) adds complexity to treatment decisions. While conventional guidance favors vitamin K antagonists (VKAs), emerging evidence suggests favorable outcomes with direct oral anticoagulants (DOACs). Purpose This study aims to assess the safety and efficacy of DOACs versus VKAs in managing LVT among patients with and without recent acute coronary syndrome (ACS). Methods This was a retrospective observational study conducted within TriNetX, a global federated health research network with access to electronic medical records (EMRs) from participating health care organizations including academic medical centres and community hospitals covering approximately 70 million individuals, mainly in the United States. The search was conducted on 26th Februrary 2024 with a study cohort comprising patients with LV thrombus treated with either DOAC or VKA between 1st December 2013 to 1st December 2023. Subgroup analyses were conducted for patients with ACS within one month and those without ACS within a month of treatment. Cohort data were subject to propensity matching (PSM) for age, gender, ethnicities, medical and drug history. Risk analysis and Kaplan-Meier survival analysis were computed for each subgroup at 90 days since the indexed event. Results Following PSM, a total of 39,770 patients were included and 14,302 were in the ACS group and 24,162 in the non-ACS group. DOAC treatment exhibited favourable outcomes for stroke, bleeding, and systemic embolism (p<0.05) compared to VKA in the overall cohort (Table 1). In the ACS group, DOAC was linked to a reduced risk of stroke and systemic embolism (p<0.05) but not bleeding (p=0.066). In the non-ACS group, DOAC was associated with a decreased risk of stroke and bleeding (p<0.05) but not systemic embolism (p=0.113). Across all groups, there were no disparities in overall all causes of mortalities. Conclusion DOACs demonstrated better safety and efficacy outcomes when compared to VKAs in LVT treatment. Interestingly, DOACs utilisation within the ACS context resulted in a diminished risk of embolic complications without the benefit of reduced bleeding risk seen in patients without ACS, suggesting potential implications of triple therapy within first month of ACS treatment, removing the bleeding risk reduction of DOACs. This shows a fundamental difference in LVT between the 2 groups of patients so future studies should aim to differentiate between the 2.