Journal of Cholesterol and Heart Disease

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Conference Proceedings - Journal of Cholesterol and Heart Disease (2020) Volume 0, Issue 0

Direct oral anticoagulants in preventing venous Thromboembolism in Ambulatory Patients with cancer: A Systematic review and meta-analysis

 Venous thromboembolism (VTE) is the second highest cause of mortality among cancer patients1. Routine thromboprophylaxis is not being given to ambulatory cancer patient based on recent guidelines.Methods: A literature search of randomized controlled trials evaluating the use of direct oral anticoagulants (DOACs) as prophylaxis for VTE among ambulatory cancer patients was conducted in the following databases: PubMed, Cochrane Library, CENTRAL,, and HERDIN. The primary outcome was the incidence of VTE and the secondary outcomes were major and non-major bleeding episodes. Two independent reviewers assessed the methodological quality of the studies using the Cochrane risk of bias tool. The random effects model for dichotomous data was used with a 95% confidence interval. Results: Two randomized controlled trials were included in this study (N=1404). The incidence of VTE among ambulatory cancer patients on DOACs was significantly decreased (OR 0.53; 95% CI 0.31-0.89, I2=31%). The rates of major (OR 1.97; 95% CI 0.88-4.43, I2=0%) and non-major (OR 1.37; 95% CI 0.79-2.37, I2=0%) bleeding were not statistically significant.

Conclusion: This meta-analysis showed that the use of direct oral anticoagulants is associated with a statistically significant decrease in the rates of venous thromboembolism among high risk ambulatory cancer patients receiving chemotherapy. There was no statistically significant difference in the rates of major and non-major bleeding. DOACs can be used as primary VTE prophylaxis.  Further evaluation on more homogeneous population of cancer patients and more powered studies is needed.
Author(s): Dastynne Marie L. Dela Cruz and Janine Audrei T. Pajimna St. Luke√Ę??s Medical Center √Ę?? Quezon City, Philippines

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