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  • Title: Comparative outcomes of catheter-directed thrombolysis plus rivaroxaban vs rivaroxaban alone in patients with acute iliofemoral deep vein thrombosis.
    Author: Tsai CJ, Lee CY.
    Journal: J Chin Med Assoc; 2019 Dec; 82(12):902-908. PubMed ID: 31567881.
    Abstract:
    BACKGROUND: Since novel oral anticoagulants (NOACs) have been introduced in the past decade, the first option of deep vein thrombosis (DVT) treatment is toward NOACs. However, aggressive and early thrombus removal strategy is widely used for treating acute iliofemoral DVT. Consequently, optimal treatment duration, efficacy, and safety of rivaroxaban alone or in combination with catheter-directed intrathrombus thrombolysis (CDT) in acute iliofemoral DVT patients should be investigated. METHODS: Patients with recent acute iliofemoral DVT treated with combined CDT-rivaroxaban (CDT) or rivaroxaban alone (control) were followed for mean (standard deviation) of 25.7 (2.5) months. DVT evolution, treatment efficacy and safety, and predisposing factors for patency and postthrombotic syndrome (PTS) development were analyzed through duplex ultrasonography, plethysmography, venography, and computed tomographic venography. RESULTS: 43.2%, 64.9%, 75.7%, and 72.2% of the CDT patients showed complete patency at 3, 6, 12, and 24 months of treatment compared with the control patients having 8.5%, 36.2%, 55.3%, and 57.4% of cumulative patency at 3, 6, 12, and 24 months, respectively (p = 0.001, 0.017, 0.088, and 0.081, respectively). The p value of the log-rank test comparing patency rates of the two groups was 0.009. The median (interquartile range, IQR) Villalta scores at 24 months were 3 (2-5) and 6 (4-8) in CDT and control patients, respectively (p = 0·001). PTS and bleeding events during therapy were, respectively, found in 35.1% and 63.8% (p = 0.017) and in 27% and 17% of CDT and control patients (p = 0.4). The Kaplan-Meier curve analysis of cumulative patency at 24 months for 6 months of rivaroxaban treatment was significant (p = 0.016). CONCLUSION: Treatment therapy and treatment duration with rivaroxaban alone or in combination with CDT are potentially associated with vein patency at 24 months, and a 6-month lysis rate and obstructive vein can influence PTS development. A larger randomized trial is warranted to confirm these findings.
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