Post-Transcatheter Aortic Valve Replacement Antithrombotic Treatment in Nonindicated Patients: Updated Systematic Review and Network Meta-Analysis.

BACKGROUND

The optimal antithrombotic strategy following transcatheter aortic valve replacement (TAVR) remains controversial.

OBJECTIVES

The authors aimed to determine the safety and efficacy of various antithrombotic regimens in patients without an indication for anticoagulation following TAVR.

METHODS

We conducted a systematic search in PubMed, Embase, Scopus, and ClinicalTrials.gov until August 2024 for studies investigating antithrombotic regimens after TAVR in patients without an indication for chronic oral anticoagulation. The analysis compared single antiplatelet therapy (SAPT), dual antiplatelet therapy (DAPT), direct oral anticoagulants, and oral anticoagulant (OAC) plus SAPT. A frequentist network meta-analysis was employed to evaluate the post-TAVR risk of all-cause mortality, cardiovascular mortality, myocardial infarction, stroke, total bleeding, and life-threatening or major bleeding.

RESULTS

Eleven studies (8 randomized controlled trials and 3 propensity score-matched cohorts) comprising 5,821 patients undergoing TAVR were included. SAPT significantly reduced the risk of life-threatening/major bleeding compared with DAPT (OR: 0.53; 95% CI: 0.35-0.80), OAC (OR: 0.52; 95% CI: 0.28-0.99), and OAC + SAPT (OR: 0.32; 95% CI: 0.13-0.76). No significant differences were observed in the risk of cardiovascular mortality, stroke, or myocardial infarction between antithrombotic regimens. Subgroup analysis indicated an increased risk of mortality with low-dose rivaroxaban+3-month SAPT compared with SAPT (OR: 0.56; 95% CI: 0.35-0.89) and DAPT (OR: 0.58; 95% CI: 0.38-0.88). Meta-regression identified chronic obstructive pulmonary disease as the only significant modifier of bleeding risk following TAVR.

CONCLUSIONS

Our findings support current guidelines recommending SAPT as the preferred antithrombotic strategy post-TAVR in patients without an indication for anticoagulation, demonstrating optimal safety without compromising efficacy.