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Clinical and Applied Thrombosis/hemostasis

Nasiredin Sadeghi, Massimo Iacobelli, Behroz Vaziri, Daniel Kahn, Debra Hoppensteadt, Nil Guler, Jawed Fareed
Recombinant factor VIIa (rFVIIa) is used in the management of bleeding in patients with hemophilia. A generic biosimilar version of NovoSeven is also developed (AryoSeven). To compare the activation profile of NovoSeven and AryoSeven, 2 commercially available protein complex concentrates (PCCs) were used. Profilnine activated by RecombiPlasTin 2G resulted in conversions of prothrombin to prethrombin and thrombin at 5 to 30 minutes. However, addition of rFVIIa at final concentration range of 0.25 to 0.5 µg/mL to the same mixture resulted in total conversion of prothrombin to thrombin with a doublet at 36 kDa...
April 2017: Clinical and Applied Thrombosis/hemostasis
Rolf Dario Frank, Regina Lanzmich, Philipp K Haager, Ulrich Budde
Aortic valve stenosis (AVS) is the most common valve disease in adults. Severe forms are associated with acquired von Willebrand syndrome (aVWS) with loss of the largest von Willebrand factor (VWF) multimers. Diagnostic gold standard is the VWF multimer analysis. Valve replacement rapidly restores the VWF structure. Uncertainty exists if this effect is permanent and how functional VWF assays perform compared with multimer analysis. We studied 21 consecutive patients with severe AVS before and 6 to 18 months after valve surgery and compared them with 14 controls without valve disease referred for coronary angiography...
April 2017: Clinical and Applied Thrombosis/hemostasis
Ercan Varol
No abstract text is available yet for this article.
April 2017: Clinical and Applied Thrombosis/hemostasis
Cristina Legnani, Michela Cini, Mirella Frascaro, Giuseppina Rodorigo, Michelangelo Sartori, Benilde Cosmi
In patients presenting non-high clinical pretest probability (PTP), a negative d-dimer can exclude venous thromboembolism without imaging tests. However, each d-dimer assay should be validated in prospective studies. We evaluated an automated d-dimer immunoassay using the Sclavo Auto d-dimer (Sclavo Diagnostics Int, Sovicille, Italy) provided by Dasit Diagnostica (Cornaredo, Milan, Italy). Three hundred two consecutive outpatients suspected of leg deep vein thrombosis (DVT) with non-high PTP were included. The Sclavo Auto d-dimer assay was evaluated on 2 analyzers (Sysmex CA-7000 and Sysmex CS-2100; Sysmex Corporation, Kobe, Japan, provided by Dasit)...
April 2017: Clinical and Applied Thrombosis/hemostasis
Alina Mărginean, Claudia Bănescu, Valeriu Moldovan, Alina Scridon, Mihai Mărginean, Rodica Bălaşa, Smaranda Maier, Mariana Ţăruşi, Minodora Dobreanu
INTRODUCTION: Clopidogrel is an antiplatelet drug widely used in patients with acute coronary syndromes or stroke. Despite adequate antiplatelet therapy, some patients develop acute ischemic events. This is partly attributed to the fact that they have poor inhibition of platelet reactivity, despite treatment. This study aimed to assess the impact of clinical and demographic variables and of cytochrome P450 2C19 (CYP2C19) loss-of-function polymorphisms on platelet response to clopidogrel evaluated using impedance aggregometry in an East European population...
April 2017: Clinical and Applied Thrombosis/hemostasis
Sani Namik Murat, Mikail Yarlioglues, Ibrahim Etem Celik, Alparslan Kurtul, Mustafa Duran, Alparslan Kilic, Fatih Oksuz
In-stent restenosis (ISR) is a common clinical problem in patients with coronary artery disease treated with percutaneous coronary intervention. Inflammatory process plays a pivotal role in the development of ISR. Both lymphocytes and monocytes are associated with inflammatory status. Recently, it has been shown that the lymphocyte-to-monocyte ratio (LMR) is a novel inflammatory marker. We aimed to investigate the association of serum LMR levels and ISR in patients undergoing bare-metal stent (BMS) implantation...
April 2017: Clinical and Applied Thrombosis/hemostasis
Yihong Sun, Yitong Wang, Juan Jiang, Lina Wang, Dayi Hu
We investigated the risk of stroke associated with renal dysfunction and the impact of warfarin therapies in Chinese patients with nonvalvular atrial fibrillation (NVAF). Information was collected on age, sex, height, weight, type of atrial fibrillation, and serum creatinine within the previous 6 months, together with the variables needed to calculate the CHADS2 score. For patients not taking warfarin, reasons why not were recorded. Three thousand seventeen eligible patients with NVAF, mean (1 standard deviation [SD]) age of 67...
April 2017: Clinical and Applied Thrombosis/hemostasis
Sabahattin Gündüz, Mehmet Özkan, Mahmut Yesin, Macit Kalçık, Mustafa Ozan Gürsoy, Süleyman Karakoyun, Mehmet Ali Astarcıoğlu, Ahmet Çağrı Aykan, Tayyar Gökdeniz, Murat Biteker, Nilüfer Ekşi Duran, Mustafa Yıldız
BACKGROUND: The outcomes of thrombolytic therapy (TT) in elderly patients with prosthetic valve thrombosis (PVT) have not been evaluated previously. We investigated the outcomes of low-dose and slow infusion TT strategies in elderly patients with PVT. METHODS: Twenty-seven (19 female) patients aged ≥65 years (median: 70 years, range: 65-82 years) were treated with repeated TT agents for PVT. The TT regimens included 24-hour infusion of 1.5 million units of streptokinase in 2 patients, 6-hour infusion of 25 mg recombinant tissue plasminogen activator (t-PA) in 12 patients, and 25-hour infusion of 25 mg t-PA in 13 patients...
April 2017: Clinical and Applied Thrombosis/hemostasis
Yanhong Liu, Kang Li, Scott A Venners, Yi-Hsiang Hsu, Shanqun Jiang, Justin Weinstock, Binyan Wang, Genfu Tang, Xiping Xu
We aimed to examine the cross-sectional associations of plasma total homocysteine (tHcy) concentrations and methylenetetrahydrofolate reductase ( MTHFR) C677T genotype with dyslipidemia. A total of 231 patients with mild-to-moderate essential hypertension were enrolled from the Huoqiu and Yuexi communities in Anhui Province, China. Plasma tHcy levels were measured by high-performance liquid chromatography. Genotyping was performed by TaqMan allelic discrimination technique. Compared with MTHFR 677 CC + CT genotype carriers, TT genotype carriers had higher odds of hypercholesterolemia (adjusted odds ratio [OR] [95% confidence interval (CI)]: 2...
April 2017: Clinical and Applied Thrombosis/hemostasis
Gerald Hochleitner, Ken Sutor, Caroline Levett, Harald Leyser, Christoph J Schlimp, Cristina Solomon
Thrombelastography (TEG)/thromboelastometry (ROTEM) devices measure viscoelastic clot strength as clot amplitude (A). Transformation of clot amplitude into clot elasticity (E with TEG; CE with ROTEM) is sometimes necessary (eg, when calculating platelet component of the clot). With TEG, clot amplitude is commonly transformed into shear modulus (G; expressed in Pa or dyn/cm(2)) as follows: G = (5000 × A)/(100 - A). Use of the constant "5000" stems from Hartert's 50-year-old calculation of G for a normal blood clot...
April 2017: Clinical and Applied Thrombosis/hemostasis
Nafisa H R AbdelAziz, Hanan G AbdelAzeem, Eman M M Monazea, Tahra Sherif
BACKGROUND: The incidence of neonatal hypoxic-ischemic encephalopathy (HIE) is reportedly high in countries with limited resources. Its pathogenesis is multifactorial. A role for thrombophilia has been described in different patterns of preterm and full-term perinatal brain injury. AIM: This study aims to identify risk factors associated with neonatal HIE and also to determine the contributions of genetic thrombophilia in the development of neonatal HIE. METHODS: Sixty-seven neonates with HIE and 67 controls were enrolled in the study...
April 2017: Clinical and Applied Thrombosis/hemostasis
Brianne M Ritchie, Jean M Connors, Katelyn W Sylvester
BACKGROUND: Previous studies have demonstrated optimized diagnostic accuracy in utilizing higher antiheparin-platelet factor 4 (PF4) enzyme-linked immunosorbent assay (ELISA) optical density (OD) thresholds for diagnosing heparin-induced thrombocytopenia (HIT). We describe the incidence of positive serotonin release assay (SRA) results, as well as performance characteristics, for antiheparin-PF4 ELISA thresholds ≥0.4, ≥0.8, and ≥1.0 OD units in the diagnosis of HIT at our institution...
April 2017: Clinical and Applied Thrombosis/hemostasis
Naoki Takahashi, Masanobu Usui, Katsuki Naitoh, Hideo Wada, Toshiki Mastsui, Toshihiko Kobayashi, Takeshi Matsumoto, Shinji Uemoto, Shuji Isaji
Plasma-soluble platelet glycoprotein VI (sGPVI) levels were examined in patients undergoing living donor liver transplantation (LDLT), and the relationship between platelet activation and thrombocytopenia was evaluated to understand the mechanism of thrombocytopenia in LDLT. Platelet counts were significantly higher in the donors compared to the recipient, and the plasma sGPVI levels increased in both groups after the operation. Regarding the relationship between the platelet counts and the sGPVI levels, the slope varied on different days, and it became negative on day 3, suggesting that the plasma sGPVI levels are related to platelet activation in LDLT...
April 2017: Clinical and Applied Thrombosis/hemostasis
Mateja Kaja Jezovnik, Jawed Fareed, Pavel Poredos
INTRODUCTION: Although the role of inflammation in DVT has been investigated in different studies, there is no definite answer as to whether increased systemic inflammation is the cause or the consequence of DVT. AIM: To follow inflammatory parameters in a cohort of patients with idiopathic DVT. METHODS: Out of 49 patients with an acute idiopathic DVT, which were investigated four months after an acute episode (DEVTA 1), 43 patients were included in the follow-up study investigating inflammatory markers and hemostatic markers of endothelial damage five years after an acute DVT (DEVTA 2)...
March 2017: Clinical and Applied Thrombosis/hemostasis
Mouna Sassi, Taher Chakroun, Elisabeth Mbemba, Patrick Van Dreden, Ismail Elalamy, Annette K Larsen, Grigoris T Gerotziafas
BACKGROUND: A documented relationship between ovarian cancer and thrombosis does exist. Low-molecular-weight heparins (LMWHs) are cornerstone drugs in the primary prevention and treatment of venous thromboembolic events in patients with cancer. However, cancer cells may alter the efficiency of these antithrombotic agents. OBJECTIVE: We aimed to characterize the procoagulant phenotype of human epithelial ovarian adenocarcinoma cells, IGROV1, and to compare the capacity of tinzaparin and enoxaparin to inhibit thrombin generation triggered by these cells...
March 2017: Clinical and Applied Thrombosis/hemostasis
John Chapin, Jaqueline Bamme, Fraustina Hsu, Paul Christos, Maria DeSancho
Adults with hemophilia A (HA), hemophilia B (HB), and von Willebrand disease (VWD) frequently require surgery and invasive procedures. However, there is variability in perioperative management guidelines. We describe our periprocedural outcomes in this setting. A retrospective chart review from January 2006 to December 2012 of patients with HA, HB, and VWD undergoing surgery or invasive procedures was conducted. Type of procedures, management including the use of continuous factor infusion, and administration of antifibrinolytics were reviewed...
March 2017: Clinical and Applied Thrombosis/hemostasis
Mehmet Bozbay, Huseyin Uyarel, Gokhan Cicek, Ahmet Oz, Muhammed Keskin, Ahmet Murat, Ersin Yildirim, Gurkan Karaca, Mehmet Ergelen, Mehmet Eren
CHA2DS2-VASc score includes similar risk factors for coronary artery disease. We hypothesized that admission CHA2DS2-VASc score might be predictive of adverse clinical outcomes for patients with ST-segment elevation myocardial infarction (STEMI) who were undergoing primary percutaneous coronary intervention. A total of 647 patients with STEMI enrolled in this study. The study population was divided into 2 groups according to their admission CHA2DS2-VASc score. The low group (n = 521) was defined as CHA2DS2-VASc score ≤2, and the high group (n = 126) was defined as CHA2DS2-VASc score >2...
March 2017: Clinical and Applied Thrombosis/hemostasis
Rebecca Karp Leaf, Jean M Connors
The role of anticoagulants in the prevention of pregnancy complications, including recurrent miscarriage, late fetal loss, and preeclampsia, continues to be an area of active research and debate. Although prophylactic anticoagulation with heparin and aspirin is considered the standard of care in some conditions, such as obstetric antiphospholipid antibody syndrome, the optimal management of pregnant women with factor V Leiden mutation, prothrombin G20210A mutation, and other inherited thrombophilias without a history of thrombosis remains unknown...
March 2017: Clinical and Applied Thrombosis/hemostasis
Sertaç Aktop, Ebru Emekli-Alturfan, Onur Gönül, Gökhan Göçmen, Hasan Garip, Ayşen Yarat, Kamil Göker
AIM: Ankaferd Blood Stopper (ABS) is a new promising local hemostatic agent, and its mechanism on hemostasis has been shown by many studies. However, the effects of ABS on skin superoxide dismutase (SOD) and catalase (CAT) activities have not been investigated before. The aim of this study was to evaluate the effects of this new generation local hemostatic agent on warfarin-treated rats focusing on its the antioxidant potential in short-term soft tissue healing. METHODS: Twelve systemically warfarin treated (warfarin group) and 12 none treated Wistar Albino rats (control group) were selected for the trial...
March 2017: Clinical and Applied Thrombosis/hemostasis
S Moussaoui, P Saussoy, J Ambroise, J P Defour, R Zouitene, K Sifi, N Abadi
Many genetic risk factors have been identified for causing venous thromboembolism (VTE). Most of them affect the function of natural anticoagulant pathways, particularly the protein C system, although recent studies suggest a role of components of the hematopoietic pathway in the etiology of venous thrombosis. In this case-control study, we aimed to determine the frequency of prothrombin G20210A and factor V Leiden (FVL) G1691A polymorphisms and protein C, protein S, and antithrombin III deficiencies in the East Algerian population and to investigate whether these genetic factors are associated with VTE...
March 2017: Clinical and Applied Thrombosis/hemostasis
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