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Unfractionated heparin

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https://www.readbyqxmd.com/read/27909693/unfractionated-and-low-molecular-weight-heparin-and-the-phosphodiesterase-inhibitors-ibmx-and-cilostazol-block-ex-vivo-equid-herpesvirus-type-1-induced-platelet-activation
#1
Tracy Stokol, Priscila B D Serpa, Muhammad N Zahid, Marjory B Brooks
Equid herpes virus type-1 (EHV-1) is a major pathogen of horses, causing abortion storms and outbreaks of herpes virus myeloencephalopathy. These clinical syndromes are partly attributed to ischemic injury from thrombosis in placental and spinal vessels. The mechanism of thrombosis in affected horses is unknown. We have previously shown that EHV-1 activates platelets through virus-associated tissue factor-initiated thrombin generation. Activated platelets participate in thrombus formation by providing a surface to localize coagulation factor complexes that amplify and propagate thrombin generation...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27908843/treatment-of-acute-coronary-syndrome-by-telemedically-supported-paramedics-compared-with-physician-based-treatment-a-prospective-interventional-multicenter-trial
#2
Jörg C Brokmann, Clemens Conrad, Rolf Rossaint, Sebastian Bergrath, Stefan K Beckers, Miriam Tamm, Michael Czaplik, Frederik Hirsch
BACKGROUND: Prehospital treatment of acute coronary syndrome (ACS) in German emergency medical services (EMSs) is reserved for EMS physicians due to legal issues. OBJECTIVE: The objective of this prospective, interventional, multicenter trial was to evaluate the quality of telemedically-delegated therapy and the possible complications in patients with ACS. METHODS: After approval by the ethics committee and trial registration, a one-year study phase was started in August 2012 with 5 ambulances, telemedically equipped and staffed with paramedics, in 4 German EMS districts...
December 1, 2016: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/27906870/effectiveness-of-low-molecular-weight-heparin-versus-unfractionated-heparin-to-prevent-pulmonary-embolism-following-major-trauma-a-propensity-matched-analysis
#3
James P Byrne, William Geerts, Stephanie A Mason, David Gomez, Christopher Hoeft, Ryan Murphy, Melanie Neal, Avery B Nathens
BACKGROUND: Pulmonary embolism (PE) is a leading cause of delayed mortality in patients with severe injury. While low molecular weight heparin (LMWH) is often favored over unfractionated heparin (UH) for thromboprophylaxis, evidence is lacking to demonstrate an effect on the occurrence of PE. This study compared the effectiveness of LMWH versus UH to prevent PE in patients following major trauma. METHODS: Data for adults with severe injury who received thromboprophylaxis with LMWH or UH were derived from the American College of Surgeons Trauma Quality Improvement Program (2012-2015)...
November 30, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/27906452/primary-prophylaxis-for-venous-thromboembolism-in-ambulatory-cancer-patients-receiving-chemotherapy
#4
REVIEW
Marcello Di Nisio, Ettore Porreca, Matteo Candeloro, Michele De Tursi, Ilaria Russi, Anne Ws Rutjes
BACKGROUND: Venous thromboembolism (VTE) often complicates the clinical course of cancer. The risk is further increased by chemotherapy, but the trade-off between safety and efficacy of primary thromboprophylaxis in cancer patients treated with chemotherapy is uncertain. This is the second update of a review first published in February 2012. OBJECTIVES: To assess the efficacy and safety of primary thromboprophylaxis for VTE in ambulatory cancer patients receiving chemotherapy compared with placebo or no thromboprophylaxis...
December 1, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27904903/prediction-of-severe-bleeding-after-coronary-surgery-the-will-bleed-risk-score
#5
Fausto Biancari, Debora Brascia, Francesco Onorati, Daniel Reichart, Andrea Perrotti, Vito G Ruggieri, Giuseppe Santarpino, Daniele Maselli, Giovanni Mariscalco, Riccardo Gherli, Antonino S Rubino, Marisa De Feo, Giuseppe Gatti, Francesco Santini, Magnus Dalén, Matteo Saccocci, Eeva-Maija Kinnunen, Juhani K E Airaksinen, Paola D'Errigo, Stefano Rosato, Francesco Nicolini
Severe perioperative bleeding after coronary artery bypass grafting (CABG) is associated with poor outcome. An additive score for prediction of severe bleeding was derived (n=2494) and validated (n=1250) in patients from the E-CABG registry. Severe bleeding was defined as E-CABG bleeding grades 2-3 (transfusion of >4 units of red blood cells or reoperation for bleeding). The overall incidence of severe bleeding was 6.4 %. Preoperative anaemia (3 points), female gender (2 points), eGFR <45 ml/min/1.73 m(2) (3 points), potent antiplatelet drugs discontinued less than five days (2 points), critical preoperative state (5 points), acute coronary syndrome (2 points), use of low-molecular-weight heparin/fondaparinux/unfractionated heparin (1 point) were independent predictors of severe bleeding...
December 1, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27898513/inhibition-of-plasmin-generation-in-plasma-by-heparin-low-molecular-weight-heparin-and-a-covalent-antithrombin-heparin-complex
#6
Gabriela M T Chang, Helen M Atkinson, Leslie R Berry, Anthony K C Chan
The clinical limitations of unfractionated heparin (UFH) and low molecular weight heparin (LMWH) led to the development of an antithrombin-heparin covalent complex (ATH), which displays superior anticoagulant abilities compared with UFH. A recent study investigating its interaction with fibrinolysis showed that ATH inhibited free and fibrin bound plasmin and decreased plasmin generation on fibrin clots. These studies were conducted using purified components and did not elucidate the interaction of ATH with plasmin in the presence of its natural inhibitors α2-antiplasmin (α2-AP) and α2-macroglobulin (α2-M)...
November 24, 2016: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/27879470/incidence-and-management-of-thrombotic-and-thromboembolic-complications-following-the-norwood-procedure-a-systematic-review
#7
Arnav Agarwal, Mohammed Firdouse, Nishaan Brar, Andy Yang, Panos Lambiris, Anthony K Chan, Tapas K Mondal
BACKGROUND: The stage 1 Norwood procedure and its variants represent the first step of palliation for hypoplastic left heart syndrome. Although appropriate postoperative thromboprophylaxis is integral, significant variance remains across institutional practices. The purpose of this systematic review is to estimate the incidence of thrombosis and thromboembolism following the Norwood or modified Blalock-Taussig shunt procedure and examine current thromboprophylaxis regimens. METHODS: Ovid MEDLINE and Embase were searched from January 2000 to June 2016 for primary studies explicitly reporting incidence of thrombosis, thromboembolism (strokes and pulmonary embolisms), or shunt occlusion in neonates, infants, and children undergoing the Norwood procedure or any variant...
November 21, 2016: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/27873765/extensive-biatrial-thrombus-straddling-the-patent-foramen-ovale-and-traversing-into-the-left-and-right-ventricle
#8
Adil Sattar, Theingi Tiffany Win, Alex Schevchuck, Abinash Achrekar
We report an extremely rare case of an extensive biatrial thrombus straddling a patent foramen ovale (PFO) extending into the bilateral ventricles in a patient presenting with an acute embolic stroke. Our patient further developed a massive saddle pulmonary embolus (PE) with haemodynamic instability during the course of his hospitalisation. The risks of pharmacological thrombolysis or surgical thrombectomy for PE in a haemodynamically unstable patient with recent embolic stroke posed a significant therapeutic dilemma...
November 21, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27862911/effect-of-post-primary-percutaneous-coronary-intervention-bivalirudin-infusion-on-net-adverse-clinical-events-and-mortality-a-comprehensive-pairwise-and-network-meta-analysis-of-randomized-controlled-trials
#9
Rahman Shah, Khalid Matin, Kelly C Rogers, Sunil V Rao
OBJECTIVE: To compare the efficacies of various post-percutaneous coronary intervenetion (PCI) bivalirudin doses on net adverse clinical events (NACEs) and mortality. BACKGROUND: In primary PCI, lower risk of bleeding with bivalirudin (vs. unfractionated heparin [UFH]) is counterbalanced by an increased risk of acute stent thrombosis (ST). Several randomized clinical trials (RCTs) and a recent meta-analysis suggest that acute ST risk may be eliminated without compromising the bleeding benefit, but only if the full dose, not a low dose, of bivalirudin is continued post-PCI...
November 10, 2016: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/27856667/protocolled-redefinition-of-the-therapeutic-range-for-unfractionated-heparin-lost-in-translation
#10
Karlien L M Coene, Fedde van der Graaf, Daan van de Kerkhof
BACKGROUND: Protocolled treatment with unfractionated heparin (UFH) is a subject of ongoing debate. Even though international guidelines prescribe calibration of the activated partial thromboplastin time (aPTT) to 0.3 to 0.7 U/mL anti-Xa activity to establish an UFH therapeutic range, evidence for this approach remains scarce. In this study, we evaluated different strategies to delineate the UFH therapeutic range and analyzed the effects on patient therapeutic classification. METHODS: In 109 patient samples, the aPTT was measured with 2 different reagents, both of which used mechanical clot detection...
November 16, 2016: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/27852920/thrombin-induced-inflammation-in-human-decidual-cells-is-not-affected-by-heparin
#11
Michael P Smrtka, Liping Feng, Amy P Murtha, Chad A Grotegut
OBJECTIVE: Thrombin (Thr) generation at the uteroplacental interface induces inflammation and weakens fetal membranes. Tissue factor (TF) is a powerful procoagulant that is increased by Thr in decidual cells (DCs). The TF expression may play an important role in modulating Thr-induced inflammation. The purpose of this study was to assess the effect of heparin, including nonanticoagulant (desulfated) heparins, on basal and Thr-induced expression of TF and inflammatory cytokines in DCs...
November 16, 2016: Reproductive Sciences
https://www.readbyqxmd.com/read/27851193/1558-establishing-safety-of-high-dose-unfractionated-heparin-in-obese-surgical-patients-for-prophylaxis
#12
Phillip Sanshuck, Nicole Nguyen, Elaine Law
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27849664/perioperative-pharmacological-thromboprophylaxis-in-patients-with-cancer-a-systematic-review-and-meta-analysis
#13
Qiang Guo, Bin Huang, Jichun Zhao, Yukui Ma, Ding Yuan, Yi Yang, Xiaojiong Du
OBJECTIVE: To compare the relative effects between pharmacological thromboprophylaxis and no anticoagulation. BACKGROUND: The efficacy and safety of pharmacological thromboprophylaxis in cancer patients undergoing surgery need to be quantified to guide management. METHODS: We searched multiple electronic databases (up to March 31, 2016) for trials of cancer patients undergoing surgery that assessed the relative benefits and harms of perioperative pharmacological thromboprophylaxis...
November 15, 2016: Annals of Surgery
https://www.readbyqxmd.com/read/27848915/heparin-monitoring-clinical-outcome-and-practical-approach
#14
Noémie Despas, Anne-Sophie Larock, Hugues Jacqmin, Jonathan Douxfils, Bernard Chatelain, Marc Chatelain, François Mullier
Traditional anticoagulant agents such as unfractionated heparin (UFH), low molecular weight heparins (LMWHs), fondaparinux, danaparoid and bivalirudine are used in the prevention and treatment of thromboembolic diseases. However, these agents have limitations: their constraining parenteral route of administration and the need for regular coagulation monitoring for HNF. The LMWHs, with their more predictable anticoagulant response, don't require a systematic monitoring. The usefulness of LMWHs monitoring in several clinical situations such as pregnancy, obesity and renal insufficiency is a matter of debate...
December 1, 2016: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/27837164/evaluation-of-a-pharmacy-managed-heparin-protocol-for-extracorporeal-membrane-oxygenation-patients
#15
Kalliopi Fitousis, Robin Klasek, Phillip E Mason, Faisal Masud
INTRODUCTION: Unfractionated heparin is the preferred anticoagulant in extracorporeal membrane oxygenation (ECMO) patients. However, there is a lack of consensus on its titration and monitoring. The objective of this study was to describe the efficacy and safety of a pharmacy managed heparin protocol utilizing activated partial thromboplastin time (aPTT) in comparison to our standard physician-managed activated clotting time (ACT)-based anticoagulation in ECMO patients. METHODS: Patients administered a heparin drip while on ECMO were included in the study...
November 10, 2016: Perfusion
https://www.readbyqxmd.com/read/27836023/coagulation-factor-abnormalities-related-to-discordance-between-anti-factor-xa-and-activated-partial-thromboplastin-time-in-patients-supported-with-continuous-flow-left-ventricular-assist-devices
#16
Sirtaz Adatya, Roy Sunny, Megan J Fitzpatrick, Monica Colvin, Thennapan Thennapan, Ranjit John, Nicole Dodge Zantek, Marc Pritzker, Peter Eckman, Nir Uriel
BACKGROUND: High levels of discordance between activated partial thromboplastin time (aPTT) and anti-factor Xa (anti-FXa) have been reported in patients with continuous-flow left ventricular assist devices (CF-LVADs). We sought to determine the biochemical basis for discordance by simultaneous measurement of coagulation factors with aPTT and anti-FXa. METHODS: Consecutive CF-LVAD patients admitted for intravenous unfractionated heparin (IV-UFH) therapy were studied...
November 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27829874/increased-unfractionated-heparin-requirements-with-decreasing-body-mass-index-in-pregnancy
#17
Avinash S Patil, Tracy Clapp, Piyamas K Gaston, David Kuhl, Eliza Rinehart, Norman L Meyer
BACKGROUND: Pregnant women receiving low-molecular-weight heparin for therapeutic anticoagulation are often converted to unfractionated heparin in anticipation of labor. We aim to characterize the impact of maternal body mass index on attainment of target anticoagulation during the conversion process. METHODS: We conducted a five-year retrospective study of a pregnancy cohort converted from low-molecular-weight heparin to unfractionated heparin in the third trimester...
December 2016: Obstetric Medicine
https://www.readbyqxmd.com/read/27820879/heparin-for-the-treatment-of-thrombosis-in-neonates
#18
REVIEW
Olga Romantsik, Matteo Bruschettini, Simona Zappettini, Luca Antonio Ramenghi, Maria Grazia Calevo
BACKGROUND: Among pediatric patients, newborns are at highest risk of developing thromboembolism. Neonatal thromboembolic (TE) events may consist of both venous and arterial thromboses and often iatrogenic complications (eg, central catheterization). Treatment guidelines for pediatric patients with TE events most often are extrapolated from the literature regarding adults. Options for the management of neonatal TE events include expectant management; nitroglycerin ointment; thrombolytic therapy or anticoagulant therapy, or a combination of the two; and surgery...
November 7, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27818480/rivaroxaban-for-periprocedural-anticoagulation-therapy-in-japanese-patients-undergoing-catheter-ablation-of-paroxysmal-non-valvular-atrial-fibrillation
#19
Mihoko Kawabata, Takeshi Sasaki, Shingo Maeda, Yasuhiro Shirai, Yasuteru Yamauchi, Junichi Nitta, Masahiko Goya, Kenzo Hirao
Direct oral anticoagulants (DOACs) have been shown to be safe and effective for the prevention of stroke in nonvalvular atrial fibrillation (NVAF) patients, however, experience with peri-AF ablation management of DOACs is scarce. This study aimed to investigate the safety and feasibility of periprocedural anticoagulation therapy with rivaroxaban in Japanese patients undergoing paroxysmal non-valvular AF (NVAF) ablation using radiofrequency energy.This study was a multicenter, prospective pilot study. In paroxysmal NVAF patients, rivaroxaban (15 mg or 10 mg once-daily) was started at least 4 weeks prior to AF ablation, discontinued on the day of the procedure, resumed within 24 hours after ablation, and continued at least 3 months afterwards...
November 4, 2016: International Heart Journal
https://www.readbyqxmd.com/read/27818120/efficacy-and-safety-of-prehospital-administration-of-unfractionated-heparin-enoxaparin-or-bivalirudin-in-patients-undergoing-primary-percutaneous-coronary-intervention-for-st-segment-elevation-myocardial-infarction-insights-from-the-orbi-registry
#20
Vincent Auffret, Guillaume Leurent, Dominique Boulmier, Marc Bedossa, Amer Zabalawi, Jean-Philippe Hacot, Isabelle Coudert, Emmanuelle Filippi, Philippe Castellant, Antoine Rialan, Gilles Rouault, Philippe Druelles, Bertrand Boulanger, Josiane Treuil, Bertrand Avez, Marielle Le Guellec, Martine Gilard, Hervé Le Breton
BACKGROUND: Despite numerous studies in recent years, the best anticoagulant option for primary percutaneous coronary intervention (PCI) remains a matter of debate. AIMS: To compare in-hospital outcomes after prehospital administration of low-dose unfractionated heparin (UFH)±glycoprotein IIb/IIIa inhibitors (GPIs), enoxaparin±GPIs, or bivalirudin in patients undergoing primary PCI for ST-segment elevation myocardial infarction (STEMI). METHODS: A total of 1720 patients (median age 62...
November 3, 2016: Archives of Cardiovascular Diseases
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