View clinical trials related to Thrombophilia.
Filter by:An estimated 22% of the global population is at an increased risk of a severe form of COVID-19, while one in four coronavirus patients admitted to intensive care unit will develop a pulmonary embolism. A major public health question remains to be investigated: why COVID-19 is mild for some, critically severe for others and why only a percentage of COVID-19 patients develop thrombosis, despite the disease's proven hypercoagulable state? Patients' intrinsic characteristics might be responsible for the deep variety of disease forms. Our study aims to assess the validity of the hypothesis according to which underlining genetic variations might be responsible for different degrees of severity and thrombotic events risks in the novel coronavirus disease. Moreover, we suspect that prothrombotic genotypes occuring in the genes that encode angiotensin-converting enzyme (ACE-DEL/INS) and angiotensinogen (AGT M235T) are involved in the unpredictable evolution of COVID-19, both in terms of severity and thrombotic events, due to the strong interactions of SARS-CoV-2 with the renin-angiotensin-aldosterone system (RAAS). Therefore, we also aim to assess the validity of the theory according to which there is a pre-existing atypical modulation of RAAS in COVID-19 patients that develop severe forms and/or thrombosis. Our hypothesis is based on various observations. Firstly, there is a substantial similarity with a reasonably related condition such as sepsis, for which there is a validated theory stating that thrombophilic mutations affect patients' clinical response. Secondly, racial and ethnic genetic differences are responsible for significant dissimilar thrombotic risks among various nations. Thirdly, an increase in stroke incidence has been reported in young patients with COVID-19, without essential thrombosis risk factors, favoring the idea that a genetic predisposition could contribute to increase the thrombotic and thromboembolic risk. Fourthly, the plasminogen activator inhibitor (PAI)-1 4G/5G inherited mutation was found to be responsible for a thrombotic state causing post-SARS osteonecrosis.
In parallel with the growth of American Thrombosis and Hemostasis Network's (ATHN) clinical studies, the number of new therapies for all congenital and acquired hematologic conditions, not just those for bleeding and clotting disorders, is increasing significantly. Some of the recently FDA-approved therapies for congenital and acquired hematologic conditions have yet to demonstrate long-term safety and effectiveness beyond the pivotal trials that led to their approval. In addition, results from well-controlled, pivotal studies often cannot be replicated once a therapy has been approved for general use.(1,2,3,4) In 2019 alone, the United States Food and Drug Administration (FDA) has issued approvals for twenty-four new therapies for congenital and acquired hematologic conditions.(5) In addition, almost 10,000 new studies for hematologic diseases are currently registered on www.clinicaltrials.gov.(6) With this increase in potential new therapies on the horizon, it is imperative that clinicians and clinical researchers in the field of non-neoplastic hematology have a uniform, secure, unbiased, and enduring method to collect long-term safety and efficacy data. ATHN Transcends is a cohort study to determine the safety, effectiveness, and practice of therapies used in the treatment of participants with congenital or acquired non-neoplastic blood disorders and connective tissue disorders with bleeding tendency. The study consists of 7 cohorts with additional study "arms" and "modules" branching off from the cohorts. The overarching objective of this longitudinal, observational study is to characterize the safety, effectiveness and practice of treatments for all people with congenital and acquired hematologic disorders in the US. As emphasized in a recently published review, accurate, uniform and quality national data collection is critical in clinical research, particularly for longitudinal cohort studies covering a lifetime of biologic risk.(7)
Cirrhosis is a condition in which the liver does not function properly due to long-term damage. This damage is characterized by the replacement of normal liver tissue by scar tissue. The liver carries out several necessary functions, including synthesis of proteins participating in blood coagulation process. Some of these proteins contribute to coagulation and others make blood more fluid. In healthy people there is a balance between the two. In cirrhotic patient, there is an imbalance inducing hypercoagulation (hypercoagulability state). Cirrhotic patients are so known to be at risk of vein thrombosis (for example portal vein thrombosis: clot in hepatic vein). Mechanisms leading to this imbalance are unclear. Studies need to be completed to improve patient's management. The EPCRs (Endothelial Protein C Receptor soluble) takes part in blood coagulation process. Previous studies have shown that blood levels of EPCRs are increased in patients with cirrhosis. The primary purpose of the study is to evaluate if the EPCRs could play a role in cirrhosis-associated hypercoagulability state.
In this clinical cohort study, the investigators observe the efficacy of low molecular weight heparin in the treatment of thrombophilia with recurrent pregnancy loss with a prospective randomized controlled trial.
There is a complex, mutual relationship between cancer and thrombosis. Indeed, the tumor has the capacity to activate the hemostatic system and this leads to an increased thrombotic risk in cancer patients. Even in the absence of clinical manifestations, cancer patients are commonly characterized by hemostatic abnormalities, recognized only by laboratory testing, which define the 'hypercoagulable state'. Of interest, hypercoagulation has been repeatedly reported to be associated with tumor progression and poor prognosis in various carcinomas. On the other hand, thrombotic event can represent the first signal of the presence of an occult tumor. These findings suggest that the coagulant pathway might play a role in the preclinical phase of cancer. The investigators hypothesize that a persistent, subclinical activation of the hemostatic system in an otherwise healthy subject, may predispose not only to thrombosis, but also to tumor formation and spreading. A major problem in primary cancer prevention is the lack of effective predictive markers of the disease. The HYPERCAN is an ongoing prospective Italian multicenter study organized around two tightly-interconnected research programs aiming to: 1_the assessment of thrombotic markers as a tool for cancer risk prediction in two large populations of healthy subjects, i.e. a group of healthy blood donors of Bergamo and Milano Provinces and a subgroup of Moli-sani subjects of the Molise region; and 2_ the evaluation whether thrombotic markers and/or the occurrence of overt thrombosis (or disseminated intravascular coagulation) may be prognostic of cancer disease outcomes (i.e. overall survival, progression free survival in metastatic cancer, disease free survival in limited disease) in cancer patients with different types of solid tumors (i.e. breast, lung and gastrointestinal cancers). Therefore, the assessment of cancer risk occurrence in healthy individuals might be useful for anticipation of cancer diagnosis. In addition, the results of this study might help to evaluate whether thrombotic markers may be prognostic of cancer outcomes independently of the disease extension.
The occurrence of a spontaneous fetal loss (FL) is a rather frequent event: it has been estimated that up to 15% of pregnancies result in a fetal loss. However, recurrent events, defined as >2 or >3 loss, depending on the guidelines used (American College of Obstetricians and Gynecologists or Royal College of Obstetricians Gynaecologists guidelines), occur in 1 % of all pregnancies and it is noteworthy that Recurrent Fetal Loss ( RFL) in about 30-40% of cases remain unexplained after standard gynaecological, hormonal and karyotype investigations. Furthermore, it is important to consider that chromosomal abnormalities are responsible for at least 60% of FL in the first trimester, thus an abnormal karyotype in the fetus should be excluded prior to consider testing women for genetic susceptibility to placental vascular complications (inherited thrombophilia). Common inherited conditions, the factor V Leiden (FV) and the factor II G20210A (FII) mutations have been recognized as risk factors for FL. The efficacy of treatment with antithrombotic drugs during pregnancy in women with a history of RFL/ Intra Uterine Fetal Death (IUFD) and thrombophilia is still debated, due to scarcity of available data. Italian guidelines suggest the use of Low-Molecular-Weight Heparin (LMWH) in women with FV or FII mutations and previous otherwise unexplained obstetric complications, while guidelines released by RCOG suggest that heparin therapy during pregnancy may improve the live birth rate in women with second trimester loss associated with inherited thrombophilias. Hence, the idea to propose this prospective observational study comparing clinical data and outcomes in women with common inherited thrombophilias and in women without. During this study the investigators will collect and evaluate clinical data from examinations and visits by patients, eligible for the study as carriers of thrombophilic defects. This observation will begin before pregnancy and continue until the puerperium, allowing us to study all possible factors influencing these conditions. The study will add knowledge for improving feto-maternal prognosis and preventing spontaneous and recurrent FL. Plan of the study: multicenter observational study
Rationale: To analyse the arterial state of women with thrombophilia by techniques studying micro and arterial macrocirculation because of a reported and still discussed increase risk in cardio-vascular events in these women. Primary objective: To measure endothelium dependent vasodilatation (VDE) in controls and in women with thrombophilia.
The purpose of this study is to determine whether adding clopidogrel to aspirin after coronary bypass operation (CABG) improves graft patency, in patients that have preoperatively increased platelet activity(hypercoagulable) and therefore greater risk of graft occlusion( thrombosis).
Patients with malignancies are at high risk of developing a thromboembolic complication and their treatment with chemo- and or radiation therapy further enhances this risk. Conventional haemostatic tests are not suitable as a screening tool of a hypercoagulable state. A hypercoagulable profile identified with the whole blood Thrombelastograph (TEG) Analyzer parameter maximal amplitude (MA) is reported to correlate with thrombotic events in patients undergoing major non-cardial surgery and recurrent ischemic events in patients undergoing percutaneous coronary intervention. In this study we investigate the correlation between TEG measurements and thromboembolic events in patients with newly diagnosed malignancies. The hypotheses of this study are: 1. Patients with malignancies and hypercoagulability, defined as a TEG MA>69 mm and /or R<4 min is at increased risk of developing thromboembolic complications as compared to those with a MA<69 mm and/or a R>4 min. 2. Hypercoagulability and hence TEG R and MA values are affected by the treatment instituted in these patients (chemo and radiation therapy) rendering the patients more hypercoagulable and hence at increased risk of developing thrombotic complications.
We hypothesize that reduced dose of enoxaparin in elderly patients will result in reduced proportion of patients with therapeutic anti Xa activity and reduced clinical efficacy.