Unprovoked VTE

BACKGROUND: The duration of anticoagulation for a first episode of unprovoked venous thromboembolism (VTE) should balance the likelihood of VTE recurrence against the risk of major bleeding. OBJECTIVES: Analyze rates and case-fatality rates (CFRs) of recurrent VTE and major bleeding after discontinuing anticoagulation in patients with a first unprovoked VTE after at least 3 months of anticoagulation. PATIENTS/METHODS: We compared the rates and CFRs in patients of the RIETE and COMMAND-VTE registries...

BACKGROUND: The study aimed to elucidate the prevalence of nitrous oxide (N2O) usage in patients with unexplained venous thromboembolism (VTE), highlighting the potential association with hyperhomocysteinaemia (HHcy). METHODS: We conducted a retrospective study at the Royal London Hospital, examining cases of N2O-related VTE from March to August 2023. Among 50 patients identified, four (8%) had recent unprovoked VTE. Patient data were collected based on N2O ambulatory emergency care pathway admissions...

OBJECTIVE: Non-vitamin K antagonist oral anticoagulants have shown similar efficacy and lower bleeding rates than Vitamin K antagonists for venous thromboembolism. However, this has not been proven in mesenteric vein thrombosis. This study aimed to compare the clinical outcomes of vitamin K antagonists and non-vitamin K antagonist oral anticoagulants. METHODS: Between Jan 2014 and July 2022, mesenteric vein thrombosis was diagnosed on computed tomography in 225 patients in a tertiary hospital...

After a first episode of unprovoked vein thrombosis, the risk of recurrence persists for many years. Long term of anticoagulant therapy prevents the recurrence of vein thrombosis but is associated with a major risk of bleeding. As platelets play a role in the initiation and propagation of venous thromboembolism as well, antiplatelet agents, may play a role in the treatment and prevention of this disease. This review summarizes available evidence on effect of aspirin in the prevention of recurrent deep vein thrombosis...

INTRODUCTION: Venous thromboembolism (VTE) may be the first sign of an undiagnosed cancer. The RIETE and SOME scores aim to identify patients with acute VTE at high risk of occult cancer. In the present study, we evaluated the performance of both scores. METHODS: The scores were evaluated in a retrospective cohort from two centers. The area under the receiver-operating characteristics curve (AUC) evaluated the discriminatory performance. RESULTS: The RIETE score was applied to 815 patients with provoked and unprovoked VTE, of whom 56 (6...

Inherited thrombophilia (IT) workup is commonly pursued in venous thromboembolism (VTE) patients. Recent American Society of Hematology (ASH) guidelines recommend a selective approach to IT testing, nevertheless, evidence on whether thrombophilia testing can actually improve patient-important outcomes through tailored management is limited. Data from the large prospective RIETE registry was analyzed to compare VTE risk factors, management and outcomes between patients who were tested for IT and untested patients, during anticoagulant treatment and following its discontinuation...

BACKGROUND: Patients with unprovoked venous thromboembolisms (VTEs) can be sub-classified based on the different phenotypes using a latent class analysis (LCA), which might be useful for selecting individual management strategies. METHODS: In the COMMAND VTE Registry-2 database enrolling 5197 VTE patients, the current derivation cohort consisted of 1556 patients with unprovoked VTEs. We conducted clustering with an LCA, and the patients were classified into subgroups with the highest probability...

Decision analysis can play an essential role in informing practice guidelines. The American Society of Hematology (ASH) thrombophilia guidelines have made a significant step forward in demonstrating how decision modeling integrated within GRADE (Grading of Recommendations Assessment, Developing, and Evaluation) methodology can advance the field of guideline development. Although the ASH model was transparent and understandable, it does, however, suffer from the certain limitations that may have generated potentially wrong recommendations...

BACKGROUND: Patients with acute venous thromboembolism (VTE) need anticoagulation (AC) therapy for at least 3/6 months (primary treatment); after that period, they should receive a decision on the duration of therapy. METHODS: This study examined the complications occurring during two years of follow-up (FU) in patients with a first VTE who were recruited in 20 clinical centers and had discontinued or prolonged AC. They were included in the START2-POST-VTE prospective observational study...

Venous thromboembolism (VTE), including deep venous thrombosis (DVT) and pulmonary embolism (PE), represents a substantial healthcare challenge. Provoked and unprovoked DVT cases carry distinct risks and treatment considerations. Recognizing the limitations of this classification, molecular markers may enhance diagnostic precision and guide anticoagulation therapy duration relying on patient history and risk factors. This preliminary, open-label, prospective cohort study was conducted including 15 patients (10 provoked DVT and 5 unprovoked DVT) and a control group of healthy plasmatic subjects...

BACKGROUND: Contemporary guidelines recommend extended-duration anticoagulation among patients with a first unprovoked venous thromboembolism (VTE). Little is known about whether this recommendation aligns with patient values after a bleeding complication. OBJECTIVES: To explore the experiences, values, and decisional needs of patients with unprovoked VTE related to extended-duration treatment after an anticoagulant-associated bleed. METHODS: In this descriptive, qualitative study, face to face online semistructured interviews were conducted with patients with unprovoked VTE who had experienced bleeding and continued anticoagulant treatment in one academic hospital in Canada...

Venous thromboembolism (VTE) is frequently encountered across various specialties. The management of VTE has become more nuanced, requiring consideration of several factors when deciding on the choice and duration of anticoagulation. This evidence-based review article summarises the current practice and evidence behind anticoagulation in VTE, incorporating national and international guidelines. Factors influencing decision-making around the choice and duration of anticoagulation, along with special circumstances such as cancer and antiphospholipid syndrome, are discussed...

A 45-year-old female presented with unprovoked recurrent venous thromboembolism (VTE), in unusual sites, and pancytopenia, posing a complex diagnostic challenge. Work-up for inherited thrombophilia, antiphospholipid syndrome (APLS) and paroxysmal nocturnal haemoglobinuria were unremarkable. Investigations revealed autoimmune thyroid disease, and a mixed iron/vitamin B12 deficiency due to pernicious anaemia and resultant atrophic gastritis. Hyperhomocysteinaemia due to vitamin B12 deficiency was identified as a potential contributor to her recurrent VTE...

Tranexamic acid (TXA) is an essential procoagulant drug used in various intra- and postoperative situations. Its efficacy and safety profile in obese cases undergoing laparoscopic sleeve gastrectomy (LSG) is still unresolved. Therefore, this meta-analysis evaluated and investigated the current intra- and postoperative effects and hazards of TXA on patients undergoing LSG. As for methodology, Web of Science, Cochrane Library, Scopus, and PubMed were thoroughly searched for relevant studies. Retrieved results were prepared for screening through Endnote, helping to identify eligible studies...

Pulmonary embolism (PE) represents mechanical obstruction of one or more branches of pulmonary vasculature due to thromboembolism from a deep vein thrombosis. Hormonal contraceptives, hormonal replacement therapy, antipsychotics and fibrates are medications that are associated with increased risk of venous thromboembolism(VTE). Etanercept is a TNF alpha and beta receptor blocker. Rarely this medication has been identified as a risk factor for VTE. There is a possible correlation between rheumatoid arthritis(RA) and risk of VTE in patients with RA...

AIM: Hereditary thrombophilia (HT) testing is frequently conducted during the evaluation of patients with pulmonary embolism (PE). However, the utility of routine HT testing in this setting is unclear. We sought to assess the association of HT with risk of recurrent venous thromboembolism (VTE) following first-time PE. METHODS: We conducted a multi-hospital retrospective study. 290 patients with a first-time PE, who had been tested for HT, completed at least 3 months of therapeutic anticoagulation (AC), subsequently discontinued AC, and were followed for at least 36 months thereafter, were included...

Hypercoagulable disorders are best described as a group of acquired and hereditary conditions that increase the risk for the development of thrombi within veins or arteries. In the setting of an unprovoked VTE, common practice in the inpatient setting has been further investigation via a thrombophilia workup to establish an underlying cause. Current Hematology-Oncology guidelines argue against inpatient workup as the results rarely influence inpatient management. Following ASH guidelines [Middledorp], the current study found that only 15% (11/72) of patients met appropriate criteria for thrombophilia testing...

OBJECTIVES: Detecting occult cancer in patients with unprovoked venous thromboembolism (VTE) remains a significant challenge. Our objective was to investigate the potential predictive role of coagulation-related biomarkers in the diagnosis of occult malignancies. METHODS: We conducted a nested case-control study with a 1-year prospective cohort of 214 patients with unprovoked VTE, with a focus on identifying occult cancer. At the time of VTE diagnosis, we measured various biomarkers, including soluble P-selectin (sP-selectin), dimerized plasmin fragment D (D-dimer), platelets, leukocytes, hemoglobin, total extracellular vesicles (EVs), EVs expressing tissue factor on their surface (TF+EVs), and EVs expressing P-selectin on their surface (Psel+EVs) in all participants...

Unprovoked thrombosis (thrombosis occurring without an established environmental factor favouring the episode) is a classic feature of APS. In the general population, provoked venous thromboembolism (VTE) is clearly defined and has clinical and therapeutic differences compared with unprovoked VTE. Whether provoked VTE in the context of APS may lead to a limited treatment duration is not well established. Therefore, careful clinical and laboratory evaluation is needed to identify patients eligible for a limited duration of anticoagulation treatment after provoked VTE...

VEXAS (Vacuoles, E1 enzyme, X-linked, Autoinflammatory, Somatic) syndrome, caused by somatic mutations in UBA1, is an autoinflammatory disorder with diverse systemic manifestations. Thrombosis is a prominent clinical feature of VEXAS. The risks factors and frequency of thrombosis in VEXAS are not well described, due to the disease's new discovery and paucity of large databases. We evaluated 119 VEXAS patients for venous and arterial thrombosis and correlated their presence with clinical outcomes and survival...