Safety and Efficacy of Anticoagulation Therapy With Low Molecular Weight Heparin for Portal Vein Thrombosis in Patients With Liver Cirrhosis

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Abstract
Treatment of portal vein thrombosis (PVT) in patients with liver cirrhosis is not well established. We intended to assess the safety and efficacy of low molecular weight heparin (LMWH) to treat PVT in cirrhotic patients. All 39 patients diagnosed with non-neoplastic PVT and cirrhosis from June 2005 to December 2006 were evaluated for anticoagulation therapy (AT). PVT was occludent in 15.4%, partial in 64.1%, and portal cavernoma presented in 20.5%. Twenty-eight patients received 200 U/kg/d of enoxaparin for at least 6 months. In 39.3% of patients PVT was an occasional finding, in 10.7% presented with acute abdominal pain, in 50% with bleeding from gastroesophageal varices. In this last group LMWH was started after endoscopic eradication of varices by band ligation. Complete recanalization of portal vein occurred in 33.3%, partial recanalization in 50% and no response in 16.7% of patients. Further 12 patients who continued AT obtained complete recanalization at a median time of 11 months (range 7 to 17 mo). Overall, a complete response was obtained in 75% of patients. No significant side effects, particularly bleeding complications, were observed during the treatment. LMWH demonstrated safe and effective in the treatment of PVT in patients with liver cirrhosis.