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Journal of Thrombosis and Haemostasis: JTH

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https://www.readbyqxmd.com/read/28639418/clinical-course-of-isolated-distal-deep-vein-thrombosis-in-patients-with-active-cancer-a-multicenter-cohort-study
#1
Francesco Dentali, Samuela Pegoraro, Stefano Barco, Matteo Nicola Dario di Minno, Daniela Mastroiacovo, Fulvio Pomero, Corrado Lodigiani, Federica Bagna, Michelangelo Sartori, Giovanni Barillari, Nicola Mumoli, Mariasanta Napolitano, Serena Maria Passamonti, Raffaella Benedetti, Walter Ageno, Marcello Di Nisio
BACKGROUND: Although isolated distal deep vein thrombosis (IDDVT) is frequently associated with cancer, no study has specifically evaluated the long-term clinical course of IDDVT in active cancer patients. AIM: To provide data on the rate of recurrent venous thromboembolism (VTE), major bleeding events, and death in IDDVT patients with active cancer. PATIENTS AND METHODS: Consecutive patients with active cancer and an objective IDDVT diagnosis (January 2011-September 2014) were included from our files...
June 21, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28632940/characterization-of-the-i4399m-variant-of-apolipoprotein-a-implications-for-altered-prothrombotic-properties-of-lipoprotein-a
#2
Corey A Scipione, Jackson T McAiney, Daniel J Simard, Zainab A Bazzi, Matthew Gemin, Rocco Romagnuolo, Fraser L Macrae, Robert A Ariëns, Robert A Hegele, Janeen Auld, James W Gauld, Michael B Boffa, Marlys L Koschinsky
BACKGROUND: Lipoprotein(a) (Lp(a)) is a causal risk factor for a variety of cardiovascular diseases. Apolipoprotein(a) (apo(a)), the distinguishing component of Lp(a), is homologous to plasminogen, suggesting that Lp(a) can interfere with the normal fibrinolytic functions of plasminogen. This has implications for the persistence of fibrin clots in the vasculature and hence to atherothrombotic diseases. A single nucleotide polymorphism (rs3798220) in the gene encoding apo(a) has been reported that results in an Ile to Met substitution in the protease-like domain (I4399M variant)...
June 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28632925/a-kallikrein-targeting-rna-aptamer-inhibits-the-intrinsic-pathway-of-coagulation-and-reduces-bradykinin-release
#3
K-A Steen-Burrell, J Layzer, B A Sullenger
BACKGROUND: Plasma kallikrein is a serine protease that plays an integral role in many biological processes including coagulation, inflammation, and fibrinolysis. The main function of kallikrein in coagulation is the amplification of activated factor XIIa (FXIIa) generation which ultimately leads to thrombin generation and fibrin clot formation. Kallikrein is generated by FXIIa-mediated cleavage of the zymogen, prekallikrein which is usually complexed with the nonenzymatic cofactor, high-molecular-weight kininogen (HK)...
June 20, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28622439/clinical-effectiveness-of-a-bayesian-algorithm-for-the-diagnosis-and-management-of-heparin-induced-thrombocytopenia
#4
Robert A Raschke, Tyler Gallo, Steven C Curry, Tonya Whiting, Angela Padilla-Jones, Theodore E Warkentin
BACKGROUND: Heparin-induced thrombocytopenia (HIT) is a life-threatening drug reaction caused by anti-platelet factor 4/heparin (anti-PF4/H) antibodies. Commercial tests to detect these antibodies have limitations. We previously developed a diagnostic algorithm for HIT that incorporated "four Ts" (4Ts) scoring and a stratified interpretation of an anti-PF4/H enzyme-linked immunosorbent assay (ELISA) and yielded a discriminant accuracy of 0.97 (95% CI: 0.93-1.00). OBJECTIVES: The purpose of this study was to validate the algorithm in an independent patient population and quantitate effects that algorithm adherence could have on clinical care...
June 16, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28618141/mortality-caused-by-intracranial-bleeding-in-non-severe-hemophilia-a-patients-reply
#5
J I Loomans, K Fijnvandraat
With great interest we read the letter of Dr. Patil et al. (1) in which they present the number and percentage of hemophilia patients registered in the Mumbai hemophilia center who died from (intracranial) bleeding between 2002 and 2015. We thank Dr. Patil et al. for sharing their data and for providing essential insight into fatal intracranial bleeding in nonsevere hemophilia A patients from a large hemophilia center in India. This article is protected by copyright. All rights reserved.
June 15, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28608988/should-the-dosing-algorithms-for-vitamin-k-antagonists-be-centered-around-only-vkorc1-and-cyp2c9-genotypes
#6
Tejasvita Gaikwad, Kanjaksha Ghosh, Shrimati Shetty
We read with interest the recent report by Baranova et al. [1] in which authors have carried out secondary analysis of European Pharmacogenetics of Anticoagulant Therapy (EU-PACT) data by evaluating the performance of different dosing algorithms and time intervals of outcome assessment across VKORC1- CYP2C9 genetic sub groups. This article is protected by copyright. All rights reserved.
June 13, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28603902/extracellular-signal-regulated-kinase-5-associates-with-casein-kinase-ii-to-regulate-gpib-ix-mediated-platelet-activation-via-the-pten-pi3k-akt-pathway
#7
Z Cheng, W Gao, X Fan, X Chen, H Mei, J Liu, X Luo, Y Hu
BACKGROUND: The platelet glycoprotein (GP) Ib-IX complex plays essential roles in thrombosis and hemostasis. The mitogen-activated protein kinases (MAPKs) ERK1/2 and p38 have been shown to be important in the GPIb-IX-mediated signaling leading to integrin activation. However, the roles of the MAPK extracellular signal-regulated kinase 5 (ERK5) in GPIb-IX-mediated platelet activation are unknown. OBJECTIVE: To reveal the function and mechanisms of ERK5 in GPIb-IX-mediated platelet activation...
June 11, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28600843/mortality-caused-by-intracranial-bleeding-in-non-severe-hemophilia-a-patients-comment
#8
Rucha Patil, Kanjaksha Ghosh, Shrimati Shetty
We read with interest the study done by Loomans et al (1); wherein the authors have found that out of 148 deceased mild and moderate hemophilia patients, 62 (42%) expired due to excessive bleeding i.e. due to the disorder itself and out of these 12% died of intracranial (IC) bleed. Thus, the authors rightly conclude that non-severe hemophilia A patients also have an increased risk of death due to IC bleed and thus demonstrating the need for specialized care for these patients. India harbors the second highest number of patients with hemophilia globally, majority belonging to the poverty-stricken section (2)...
June 10, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28589662/state-of-the-art-2017
#9
EDITORIAL
Wolfram Ruf, Klaus T Preissner
No abstract text is available yet for this article.
June 7, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28589645/what-the-neighbors-say
#10
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
June 7, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28586149/comparative-analysis-of-von-willebrand-factor-profiles-after-implantation-of-left-ventricular-assist-device-and-total-artificial-heart
#11
H J Reich, J Morgan, F Arabia, L Czer, J Moriguchi, D Ramzy, F Esmailian, L Lam, J Dunhill, O Volod
BACKGROUND: Bleeding remains a challenge during mechanical circulatory support and underlying mechanisms are incompletely understood. Functional von Willebrand Factor (VWF) impairment due to loss of high molecular weight multimers (MWM) produces acquired von Willebrand Disease (VWD) after left ventricular assist device (LVAD). Little is known about VWF multimers with total artificial hearts (TAHs). Here, VWF profiles with LVADs and TAHs are compared using a VWD panel. METHODS: VWD evaluations for patients with LVAD or TAH (2013-14) were retrospectively analyzed and included: VWF activity (Ristocetin Cofactor, VWF:RCo), VWF antigen (VWF:Ag), ratio of VWF:RCo to VWF:Ag, and quantitative VWF multimeric analysis...
June 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28585779/the-impact-of-initial-cancer-stage-on-the-incidence-of-venous-thromboembolism-the-scandinavian-thrombosis-and-cancer-stac-cohort
#12
I L Gade, S K Braekkan, I A Naess, J-B Hansenx, S C Cannegieter, K Overvad, H Jensvoll, J Hammerstrøm, K Blix, A Tjønneland, S R Kristensen, M T Severinsen
BACKGROUND: Absolute measures of the impact of cancer stage on the incidence of venous thromboembolism (VTE) in distinct cancer types have not been investigated in a large population based cohort study. OBJECTIVES: To investigate differences in incidence rates of objectively confirmed VTE according to development of cancer in a large population based cohort study. Cancer type and stage at the time of diagnosis was taken into account. PATIENTS AND METHODS: The Scandinavian Thrombosis and Cancer cohort includes data regarding cancer types, stages and objectively confirmed VTE diagnoses among 144,952 participants followed from 1993 through 2012...
June 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28585414/tissue-factor-variants-induce-monocyte-transformation-and-transdifferentiation-into-endothelial-cell-like-cells
#13
G Arderiu, S Espinosa, E Peña, J Crespo, R Aledo, V Y Bogdanov, L Badimon
BACKGROUND: Monocytes (Mo) increase neovascularization by releasing proangiogenic mediators and/or transdifferentiating into endothelial cell-like (ECL). Recently, we have reported that Mo-microvascular endothelial cells (mECs) crosstalk induces mEC-tissue factor (TF) expression and promotes angiogenesis. However, the effect of TF on Mo remains unknown. OBJECTIVE: Here, we analyzed whether TF might exert angiogenic effects by inducing transdifferentiation of Mo...
June 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28585328/the-recommended-dose-of-idarucizumab-may-not-always-be-sufficient-for-sustained-reversal-of-dabigatran-comment
#14
Armando Tripodi
The patient reported by Simon et al. [1] was on dabigatran and received idarucizumab for immediate reversal of anticoagulation. Measurement of dabigatran concentration showed that the antidote administration was successful, but after a few hours, there was a rebound in the plasma levels of dabigatran that was greater than expected based on previous reports [2, 3]. The authors correctly pointed out two relevant issues that emerged from this case report. First, the administration of the recommended dose of idarucizumab (though effective in neutralizing dabigatran) might not be sufficient to secure sustained reversal of the drug effect in all situations...
June 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28581694/abnormal-von-willebrand-factor-secretion-factor-viii-stabilization-and-thrombus-dynamics-in-type-2n-von-willebrand-disease-mice
#15
Laura L Swystun, Ilinca Georgescu, Jeff Mewburn, Meghan Deforest, Kate Nesbitt, Kassandra Hebert, Courtney Dwyer, Christine Brown, Colleen Notley, David Lillicrap
BACKGROUND: von Willebrand factor (VWF) and factor VIII (FVIII) circulate as a non-covalent complex with VWF serving as the carrier for FVIII. VWF indirectly influences secondary hemostasis by stabilizing FVIII and transporting it to the site of primary hemostasis. Type 2N von Willebrand disease involves impaired binding of VWF to FVIII, resulting in decreased plasma levels of FVIII. OBJECTIVES: In these studies, we characterize the impact of three type 2N VWD variants (R763A, R854Q, R816W) on VWF secretion, FVIII stabilization, and thrombus formation in a murine model...
June 5, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28581691/recombinant-factor-xiii-prophylaxis-is-safe-and-effective-in-young-children-with-congenital-fxiii-a-deficiency-international-phase-3b-trial-results
#16
Bryce A Kerlin, Aida Inbal, Andrew Will, Michael Williams, May-Lill Garly, Lotte Jacobsen, Susan L Kearney
BACKGROUND: Factor XIII deficiency is a rare, severe congenital bleeding disorder. Monthly prophylaxis with recombinant factor XIII (rFXIII) has demonstrated favorable safety and efficacy in patients ≥6 years and may similarly benefit younger children. OBJECTIVE: To evaluate the long-term safety and efficacy of rFXIII in children <6 years with congenital FXIII A-subunit deficiency. PATIENTS/METHODS: Six children, who previously completed a single-dose pharmacokinetic trial of rFXIII, received 35 IU kg(-1) rFXIII every 28 (± 2) days for a minimum of 52 weeks and were evaluated for bleeding and adverse events...
June 5, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28574672/safety-of-multidetector-computed-tomography-pulmonary-angiography-to-exclude-pulmonary-embolism-in-patients-with-a-likely-pretest-clinical-probability
#17
Helia Robert-Ebadi, Frédéric Glauser, Benjamin Planquette, Thomas Moumneh, Grégoire Le Gal, Marc Righini
BACKGROUND: In patients with suspected pulmonary embolism (PE) classified as having a likely or high pre-test clinical probability, the necessity of performing additional testing after a negative multidetector computed tomography pulmonary angiography (CTPA) remains a matter of debate. OBJECTIVES: The aim of this study was to assess the safety of excluding PE by CTPA without additional imaging in patients with a likely pre-test probability of PE. PATIENTS/METHODS: We retrospectively analysed patients included in two multicentre management outcome studies that assessed diagnostic algorithms for PE diagnosis...
June 2, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28574652/accuracy-and-consistency-of-anti-xa-activity-measurement-for-determination-of-rivaroxaban-plasma-levels
#18
Jan-Dirk Studt, Lorenzo Alberio, Anne Angelillo-Scherrer, Lars M Asmis, Pierre Fontana, Wolfgang Korte, Adriana Mendez, Pirmin Schmid, Hans Stricker, Dimitrios A Tsakiris, Walter A Wuillemin, Michael Nagler
BACKGROUND: Determining the plasma level of direct oral anticoagulants reliably is important in the work-up of complex clinical situations. OBJECTIVES: To study the accuracy and consistency of anti-Xa assays for rivaroxaban plasma concentration in a prospective, multicentre evaluation study employing different reagents and analytical platforms. METHODS: Rivaroxaban 20 mg was administered once daily to 20 healthy volunteers and blood samples were taken at peak and trough level (clinicaltrials...
June 2, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28561434/intracellular-origin-and-ultrastructure-of-platelet-derived-microparticles
#19
A A Ponomareva, T A Nevzorova, E R Mordakhanova, I A Andrianova, L Rauova, R I Litvinov, J W Weisel
BACKGROUND: Platelet-derived microparticles comprise the major population of circulating blood microparticles that play an important role in hemostasis and thrombosis. Despite numerous studies on the (patho)physiological roles of platelet-derived microparticles, mechanisms of their formation and structural details remain largely unknown. OBJECTIVES: Here we studied the formation, ultrastructure, and composition of platelet-derived microparticles from isolated human platelets, either quiescent or stimulated with one of the following activators: arachidonic acid, ADP, collagen, thrombin, or calcium ionophore A23187...
May 31, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28561420/cab4b-the-first-human-platelet-antigen-carried-by-gpix-discovered-in-a-context-of-severe-neonatal-thrombocytopenia
#20
V Jallu, T Beranger, F Bianchi, C Casale, C Chenet, N Ferre, S Philippe, J Quesne, C Martageix, R Petermann
BACKGROUND: After 3 miscarriages, a 39-year-old woman gave birth at 1 year interval to 2 severely thrombocytopenic neonates (4 and 33 G/L) with intracranial haemorrhages. Transfusion of platelets concentrates corrected thrombocytopenias. The outcome was favourable for the 1(st) child but the second one died 10 days after caesarean delivery (31 WG + 6 days). METHODS: Serological studies were performed using MAIPA and flow cytometry techniques. Human platelet antigens (HPA) genotyping was done by using the BioArray HPA BeadChip and PCR-SSP techniques...
May 31, 2017: Journal of Thrombosis and Haemostasis: JTH
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