There are 8 clinical trials

Clinical Trials

1 VeraCode Genotyping Test for Factor V and Factor II on the BeadXpress System

As an external validation test of the performance of the VeraCode Genotyping Test for Factor V and Factor II on the BeadXpress System, clinical trials will be conducted at three sites. This study will assess genotyping accuracy as compared to bidirectional sequencing and genotyping reproducibility across variables such as user, day, and site.

NCT00959504 Detection and Genotyping of Factor V and Factor II Detection and Genotyping of Factor V and Factor II Point Mutations

Detection of Factor V Leiden G1691A and Factor II (Prothrombin) G20210A Point Mutations in DNA As an external validation test of the performance of the VeraCode Genotyping Test for Factor V and Factor II on the BeadXpress System, clinical trials will be conducted at three sites. --- G1691A ---

2 Thrombophilic Risk Factors in Preterm and Infants Treated at Ha'Emek Medical Center Between the Years 1990 to 2010

There are several factor that can be related to Neonatal Thrombotic events. Among them hypercoagulability can be the cause of those events. Factor V Leiden (FVL) and Prothrombin mutation are the most common causes of hereditary thrombophilia. The incidence of in the arab population is known to be higher than the incidence in another western populations. The purpose of this study is to review retrospectively the thrombophilic risk factors that were found in a cohort of premature babies and term newborns treated and investigated at the Neonatal Intensive Care Unit and at the Pediatric Hematology Unit.

NCT01443273 Premature Thrombosis Other: Medical Records study

MeSH:Thrombosis

Also the three common genetic factors are analysed including Factor F Leiden (G1691A), Prothrombin Mutation (G20210A) and MTHFR polymorphism (C677T). --- G1691A ---

3 Effectiveness of Aspirin in Compare With Heparin Plus Aspirin in Recurrent Pregnancy Loss Treatment

This study evaluated the effect of anticoagulant treatment on the live-birth rate in women with a history of at least two continuous unexplained miscarriages or thrombophilia. It also compared two methods of treatment with aspirin and aspirin plus heparin.

NCT01542411 Recurrent Pregnancy Loss

MeSH:Abortion, Habitual

Inclusion Criteria: - unexplained recurrent miscarriage, - women had previous venous or arterial thromboembolism or who were heterozygous or homozygous for mutations for FV Leiden G1691A, prothrombin gene G20210A (FII G20210A), and methyltetrahydrofolate reductase C677T (MTHFR C677T) Exclusion Criteria: - abnormal karyotypes of both partners, - uterine and cervical anatomical disorders on pelvic ultrasonography or hysteroscopy, - abnormal ovaries and abnormal endocrine tests. --- G1691A ---

4 Fixed-dose vs. Phenotype-based PrAsugrel Dose to MATCH Therapeutic Zone in Asians With Acute Coronary Syndrome

The purpose of this study is to determine whether the fixed-dose (prasugrel 10 mg/d vs. 5 mg/d) vs. phenotype (platlet function test by VerifyNow P2Y12 assay)-based prasugrel dose adjustment can match therapeutic zone of platelet reactivity in PCI-treated Asians with acute coronary syndrome

NCT01951001 Acute Coronary Syndrome Platelet Thrombus Bleeding Drug: Prasugrel

MeSH:Acute Coronary Syndrome Syndrome

The convincing associations of arterial thrombosis to coagulation system and inflammation have been repeatedly demonstrated in multiple clinical trials: fibrinogen, factor V Leiden (G1691A) and prothrombin G20210A gene mutations, high-sensitivity C-reactive protein (CRP) and so on. --- G1691A ---

5 Risk Factors for Variceal Bleeding in Egyptian Patients With Non-Cirrhotic Portal Hypertension

Background & Aims: Non-cirrhotic portal hypertension (NCPH) represents a relatively infrequent group of conditions. This work aimed at determining causes of NCPH and evaluating the role of some clinical, laboratory, imaging and endoscopic parameters in prediction of variceal bleeding in an Egyptian cohort with NCPH. Methods: Sixty patients with non-cirrhotic portal hypertension and oesophageal varices were included. All underwent complete clinical evaluation, laboratory investigations, Color Doppler ultrasonography, platelet count/spleen diameter (mm) ratio and upper gastrointestinal endoscopy. Patients were classified into two groups according to variceal bleeding: (1) Group I: twenty six patients with history of bleeding or had an attack of bleeding during one year follow-up; and (2) Group II: thirty four patients without bleeding.

NCT02635815 Portal Hypertension Procedure: Upper gastrointestinal endoscopy

MeSH:Hypertension, Portal Hypertension

HPO:Hypertension Portal hypertension

It was done only for patients with Budd-Chiari syndrome and extrahepatic portal vein thrombosis: anticardiolipin antibodies, lupus anticoagulant, antinuclear antibodies, protein C, S, antithrombin III, factor V Leiden G1691A mutation, prothrombin gene G20210A mutation, methylene tetrahydrofolate reductase C677T mutation by PCR, Janus tyrosine kinase-2 (JAK II) V617F mutation by PCR (to exclude myeloproliferative disorders) and flow cytometry for CD55 and CD59 (to exclude paroxysmal nocturnal hemoglobinuria); (4) Abdominal ultrasonography: for liver size, echogenicity, spleen size, portal vein diameter and ascites; (5) Color Doppler ultrasonographic study: was done in the morning after an overnight fasting using a color Doppler unit with a 3.5 MHz convex probe for confirmation of portal vein (PV) patency and diameter, mean PV flow velocity (mean PVV) (cm/sec), PV direction of flow, splenic vein patency and diameter, presence of portosystemic collaterals and patency of hepatic veins; (6) Platelet count/spleen diameter ratio: calculated as: platelet count/ maximum spleen bipolar diameter by ultrasound in mm; (7) Ultrasonography guided liver biopsy: for diagnosis of NCPH and exclusion of cirrhotic portal hypertension; and (8) Upper gastrointestinal endoscopy using the Pentax video endoscope EG 3440. --- G1691A ---

6 Weight Adjusted Low Molecular Weight Heparin in Recurrent Implantation Failure: a Randomized Open Labeled Trial

Prospective randomized study of patients with infertility candidates to Assisted ReproductiveTechniques (ART), screened for all inclusion and exclusion criteria, submitted to ART cycle with or without low molecular weight heparin (LMWH) administration. Aims of the study are to evaluate, primarily, pregnancy rate/embryo transfer, secondarily take home babies/embryo transfer, implantation rate, and the role of thrombophilic factors

NCT02991950 Infertility Low Molecular Weight Heparin Drug: Parnaparin Sodium

MeSH:Infertility Body Weight

HPO:Infertility

All enrolled patients were previously screened for the presence or not of thrombophilic defects: protein C or protein S or AT deficiency, FV G1691A and FIIG20210A mutations, C677T MTHFR polymorphism,hyperhomocysteinemia, antiphospholipid antibodies. --- G1691A ---

7 Downstream Molecular Signals of P2Y12 Receptors in Hyporeactive Patients Under Clopidogrel Treatment (A Possible Mechanism of HOTPR:High On- Treatment Platelet Reactivity)

The investigators designed the following experiment to observe the pattern of administration in vitro, which can be completely excluded liver enzyme cytochrome P450 metabolism under the influence and observe the relevant P2Y12 receptor downstream signal changes, hope in the above experiments, that the human body directly for the difference between the existence of drug reactions exist.

NCT03190005 Stable Angina Drug: clopidogrel Drug: Placebos

MeSH:Angina, Stable

The investigators ran a previous related plan within 2014 under the medical study project budget of the Taipei City hospital, which named "platelet reactivity as a post-percutaneous coronary stent implantation antiplatelet adjust the reference", it has been figured that responsibility under the P2Y12 receptor inhibitors were significantly different between the taiwanese and Caucasians (taiwanese revealed clopidogrel lower responsive, but stronger reaction to ticagrelor), although "low" response to clopidogrel between taiwanese (In fact, according to our experiments, 30 days after medication, the rate of HOTPR-High On- Treatment Platelet Reactivity; namely PRU≥208, the taiwanese and Caucasians are very close to each), but it has relative lower subacute stent thrombosis rate than the Caucasian at 30 days(This reaction is also known as the "Asian paradox" ), according to literature known abroad because of the high prevalence of CYP2C19 point gene deletion rate among the Asians (compare with Caucasians: ~ 65% vs ~ 30%); there also suggested other possible explanations: Caucasian factor V Leiden (G1691A) and prothrombin (G20210A) a higher proportion of mutations, on hemostatic factors (fibrinogen, d-dimer, and factor VIII) and plasma endothelial activation markers (such as von Willebrand factor, intercellular adhesion molecule 1, and E-selectin) existed differences between the races; in addition, a number of different indicators of inflammation, such as CRP. --- G1691A ---

8 The Role of Prothrombin Gene and Methylenetetrahydrofolate Reductase(MTHFR) Gene Polymorphisms as Risk Factors for Recurrent Miscarriage

Recurrent miscarriage is a pregnancy loss before 20 weeks of gestation. The recurrent pregnancy loss(RPL) usually occurring in the first trimester of gestation and its rate is quite high (15-20% even in full reproductive period) . In 2012, the American Society for Reproductive Medicine Practice Committee issued a statement that defined recurrent pregnancy loss as a disease distinct from infertility defined by two or more failed consecutive pregnancies.approximately 40% of couples will have an etiology identified that could be associated with their loss.

NCT03209063 Recurrent Miscarriage Diagnostic Test: polymerase chain reaction

MeSH:Abortion, Spontaneous Abortion, Habitual

HPO:Spontaneous abortion

40% of couples will have an etiology identified that could be associated with their loss.Thrombophilia is the tendency to develop thromboses due to inherited defects in the coagulation system.Thrombophilia was identified as a major cause of RPL,Because pregnancy is a hypercoagulable state, thromboembolism is the leading cause of antepartum and postpartum maternal mortality .The four most common genetic markers for thrombophilia are; prothrombin gene mutation(FII, G20210A), methylene tetra hydrofolate reductase mutations (MTHFR ,C677T and A1298C), factor V Leiden (FVL, G1691A) , and plasminogen activator inhibitor 1 (PAI-1) . --- G20210A --- --- C677T --- --- A1298C --- --- G1691A ---

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