Background: Portal vein thrombosis is the most common thrombotic complication in cirrhosis. About 60% of anticoagulated patients can achieve recanalization. Despite fondaparinux (FPX) theoretical advantages, data are lacking about safety and efficacy for treatment of portal vein thrombosis in cirrhosis.
Methods: Cirrhotic patients with portal vein thrombosis treated with FPX or low-molecular-weight heparin (LMWH) were retrospectively included. The extension of thrombosis at baseline and its evolution during anticoagulant treatment were evaluated. Patients were treated with LMWH or FPX at therapeutic dosage and reduction was considered in selected cases.
Results: There were 124 patients included. Main portal vein branch, splenic, and superior mesenteric veins were involved in 84%, 13%, and 36% of cases, respectively. Forty-one patients (33%) were treated with FPX and 83 (67%) with LMWH. The probability of resolution of thrombosis at 36 months was significantly higher in patients treated with FPX than in those treated with LMWH (77% vs 51%; P = .001), particularly when prescribed at reduced dose. With multivariate analysis, the treatment with FPX (hazard ratio 2.38; P = .002) and use of a full dose (hazard ratio 1.78; P = .035) were independent predictors of portal vein full recanalization. Bleeding rate was higher in patients treated with FPX than in those treated with LMWH (27% vs 13%; P = .06).
Conclusions: FPX appears to be more effective than LMWH in the treatment of portal vein thrombosis when used at reduced dose, also in complete thrombosis. FPX should be considered among possible treatments for portal vein thrombosis in cirrhosis.
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