Active clinical trials for "Venous Thromboembolism"

This is an observational study in which patient data from the past on venous thromboembolism (VTE) in people with cancer is studied. In observational studies, only observations are made without specified advice or interventions. People with VTE have problems due to the formation of blood clots in the veins. Blood clots can reduce the flow of blood to vital organs such as the lungs, which can lead to their damage. VTE can also be "recurrent". This means that the blood clots have returned after treatment. People who have cancer are more likely to develop VTE, recurrent clots, and bleeding on blood thinning treatments. To prevent the formation of new or recurrent clots in people with cancer, a newer type of blood thinner is available, called direct-acting oral anticoagulant (DOAC). Rivaroxaban and apixaban are the most used DOACs in the US. They work by blocking a certain step in the blood clotting process, the activation of a protein called Factor X. Previous studies show that DOACs may reduce clot risk compared to other available treatments but may potentially lead to more frequent bleeding. Studies looking at these points in direct comparison of rivaroxaban and apixaban a currently missing. Therefore, this study will collect real-world data from the US to learn how well rivaroxaban works and how safe it is compared to apixaban in people with cancer and VTE who are at low risk for bleeding. To do this, researchers will look at the proportion of patients that will develop: recurrent blood clots in the veins after treatment bleeding in a critical organ bleeding that requires a hospital stay within 3 and 6 months after participants had a VTE that was treated with rivaroxaban or apixaban. De-identified data collected will cover 12 months before and at maximum 6 months after this VTE. They will come from US electronic health records and will cover the years 2012 to 2020. No visits or tests are required as part of this study.

The objective of this study is to compare oral rivaroxaban with injectable enoxaparin in orthopaedic trauma patients to determine if orally administered rivaroxaban once daily carries greater compliance and overall satisfaction than enoxaparin self-administered by subcutaneous injection once daily.

Venous thromboembolism (VTE) is a common and potentially fatal pathology in France. The risk of recurrence is around 5 to 7% per year. The identification of patients at risk of VTE and its prevention is a real health issue in particular. 50% of MTEV recurrences occur in the absence of a risk situation, suggesting the involvement of specific risk factors for MTEV recurrence that have not been identified to date. In the last ten years, so-called "genome-whole" or "genome wide" association (GWAS) approaches have identified new genetic risk factors for the first episode of VTE. On the other hand, no study has focused on the predictive factors of recurrence. The previous project, conducted from 2012 (NCT02904967), had as its main objective to identify new genes for susceptibility to MTEV recurrence by comparing cases of MTEV recurrence versus controls having had a single episode of MTEV. The MARTHA cohort (1,542 patients) is extremely valuable study material and is one of the few cohorts in the world with genome-wide data in the field of VTE. Follow-up could only be performed in 359 patients, 76 (21%) of whom presented with a new episode of VTE. The objective of this project is to increase the number of patients for whom the investigators will have information on recurrence / non-recurrence of VTE, by querying national registries on the vital status of patients, and possible causes of death. . These new data on the occurrence or not of a new thrombotic episode, will be confronted with the genetic data already available in all the patients in order to identify specific genetic risk factors and potentially predictive of the recurrence of MTEV.

Blood clots occurring in the legs and in the lungs are relatively common; they occur in around 3 in a 1000 people per year. They can cause disability and are also potentially life threatening. When a clot occurs in the legs it is called a deep vein thrombosis or DVT. When they occur in the lungs they are called a pulmonary embolism or PE. The risk for DVT and PE is higher in people with conditions which cause inflammation. The most common of these are inflammatory bowel disease (ulcerative colitis and Crohn's disease), rheumatoid arthritis, and psoriatic arthritis (a condition comprised of psoriasis and joint inflammation). What is not known is how much higher the risk of DVT and PE is in these groups compared with people without inflammatory disease, and what causes the excess risk in these people. This study aims to assess the measure the exact increase in risk for DVT and PE in people with these inflammatory conditions and to identify which risk factors are most strongly associated with the increased risk. These data should help with an understand the causes of blood clot risk in these inflammatory conditions and in identify targets for reducing risk.

In vitro fertilization (IVF) is associated with an increased risk of venous thromboembolism and in particular pulmonary embolism during the first trimester. It is not known whether this increased risk of pulmonary embolism is present both after fresh and frozen embryo transfer. Objective: To assess whether the risk of pulmonary embolism and venous thromboembolism during the first trimester of IVF pregnancies is associated with both fresh and frozen embryo transfer. A population-based cohort study with linked data from nationwide registries on women in Sweden giving birth to their first child 1992-2012

Treatment of venous thromboembolism in cancer patients is specific and has been validated in trials that favor the use of LMWH (Low Molecular Weight Heparin) instead of VKA (Vitamin K Antagonist) treatment during 6 months. International recommendations have diffused this option.It is necessary to evaluate the compliance of physicians to this treatment by measuring the number of patients with cancer treated with long term use of LMWH.

Since decades, oral anticoagulation (OAC) with vitamin K antagonists (VKA) is an established therapy for both prevention and treatment of thromboembolism in daily clinical routine. Increasing life-expectancy, the demographic change and novel oral anticoagulants lead to an increasing complexity of medical therapy. However, data on quality and management of VKA therapy with phenprocoumon in current medical care are limited. Our aim was to investigate the quality of OAC with VKA in current health care and to evaluate the potential for improvements. The investigator-initiated thrombEVAL study program comprises two cohorts of patients treated with vitamin K antagonists for oral anticoagulation therapy in real-life settings: a multicentre cohort of patients in regular medical care and a multi-local, single centre cohort of patients in a telemedicine-based coagulation service. The study program is expected to enrol a total number of approximately 2,000 to 2,500 patients. Both cohorts build on a detailed clinical assessment of participants and anticoagulation therapy at study enrolment. Subsequently active and passive follow-up investigations are carried out to document and validate complications of the treatment. Primary short-term outcome is the distribution of time in therapeutic range; the primary long-term outcome comprises the composite of stroke, systemic embolism, myocardial infarction, major and clinically-relevant bleeding and death.

The aim of the study is to compare different strategies for prevention of venous thromboembolism related to intracranial meningioma surgery. The investigators identified three hospitals where two have a very restrictive approach with respect to anticoagulant therapy while at the third hospital the use of anticoagulation the day before surgery was initiated as routine prophylaxis. Based on this "natural experiment" it will be explored whether the use of anticoagulant prophylaxis is associated with reduced risk of venous thromboembolism and/or associated with increased risk of postoperative hemorrhage as compared to the 2 cohorts where this intervention were absent.

This study will utilize a retrospective cohort design. Using the Clinical Practice Research Datalink (CPRD) linked with Hospital Episode Statistics (HES) datasets, all patients with a record of VTE diagnosis between 1 April, 2008 and 31 March, 2013 will be identified and followed from the occurrence of VTE (index date) to the first of 24 months after the index date, end of the study period, leaving the database, or death.

The primary objective of this study is to search for, in vitro, elements associated with IgG-dependent monocyte activation (signaling pathway activation, expression of pro-coagulant and pro-inflammatory factors) and to describe their prevalence in female patients with a history of proximal venous thromboembolism (proximal deep vein thrombosis or pulmonary embolism) compared to control women.