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Why develop antidotes and reversal agents for non-vitamin K oral anticoagulants?
Abstract Over the past several years, non-vitamin K oral anticoagulants (NOACs) have been introduced into clinical practice for the treatment of venous thromboembolism and prevention of stroke in patients with nonvalvular atrial fibrillation. Clinical trials have shown these agents to have similar or less risk of major bleeding as compared to warfarin therapy. Moreover, when patients do experience a major bleeding event administration of advanced factor products is rare, and post-bleed outcomes are similar in those receiving a NOAC compared to those receiving warfarin. However, there are situations where urgent r...
Source: Journal of Thrombosis and Thrombolysis - February 1, 2016 Category: Hematology Source Type: research

Evaluation of the F2R IVS-14A/T PAR1 polymorphism with subsequent cardiovascular events and bleeding in patients who have undergone percutaneous coronary intervention
In conclusion, in our population, F2R IVS-14 PAR1 variability does not affect risk of MACE or bleeding following PCI.
Source: Journal of Thrombosis and Thrombolysis - March 30, 2016 Category: Hematology Source Type: research

Prescribing trends of atrial fibrillation patients who switched from warfarin to a direct oral anticoagulant
AbstractDirect oral anticoagulant (DOAC) agents offer several lifestyle and therapeutic advantages for patients relative to warfarin in the treatment of atrial fibrillation (AF). These alternative agents are increasingly used in the treatment of AF, however the adoption practices, patient profiles, and reasons for switching to a DOAC from warfarin have not been well studied. Through the Michigan Anticoagulation Quality Improvement Initiative, abstracted data from 3873 AF patients, enrolled between 2010 and 2015, were collected on demographics and comorbid conditions, stroke and bleeding risk scores, and reasons for anticoa...
Source: Journal of Thrombosis and Thrombolysis - November 10, 2016 Category: Hematology Source Type: research

Net clinical benefit of dabigatran vs. warfarin in venous thromboembolism: analyses from RE-COVER ® , RE-COVER™ II, and RE-MEDY™
AbstractThe direct oral anticoagulants, e.g., dabigatran etexilate (DE), are effective and well tolerated treatments for venous thromboembolism (VTE). Net clinical benefit (NCB) is a useful concept in weighing potential benefits against potential harm of comparator drugs. The NCB of DE vs. warfarin in VTE treatment was compared. Post-hoc analyses were performed on pooled data from the 6-month RE-COVER ® and RE-COVER™ II trials, and data from the RE-MEDY™ trial (up to 36 months), to compare the NCB of DE (150 mg twice daily) and warfarin [target international normalized ratio (INR) 2.0–3.0]. Patients (≥18 years ol...
Source: Journal of Thrombosis and Thrombolysis - February 15, 2017 Category: Hematology Source Type: research

Real-life experience with the specific reversal agent idarucizumab for the management of emergency situations in dabigatran-treated patients: a series of 11 cases
We report 11 real-life clinical cases in which idarucizumab was used after multidisciplinary consultation in a variety of emergency situations including severe postoperative bleeding, emergency high-bleeding-risk surgery (hip/spine surgery and neurosurgery), invasive diagnostic testing (lumbar puncture), intracranial bleeding (pre-pontine subarachnoid hemorrhage and lobar intracerebral hemorrhage) and thrombolysis with recombinant tissue plasminogen activator for acute ischemic stroke. This case series illustrates the role of idarucizumab in improving patient safety in rare emergency situations requiring rapid reversal of ...
Source: Journal of Thrombosis and Thrombolysis - February 15, 2017 Category: Hematology Source Type: research

Determination of non-Vitamin K oral anticoagulant (NOAC) effects using a new-generation thrombelastography TEG 6s system
AbstractNon vitamin K oral anticoagulants (NOACs) do not require regular monitoring but information about their pharmacodynamic effect may be importantin situations like trauma, stroke oremergent surgery. Currently, no standardized point-of-care test is available to evaluate the anticoagulant effects of NOACs. We evaluated the anticoagulant effect of NOACs with the next generation point-of-care TEG assay (TEG ® 6S) based on a fully-automated thrombelastography system. We used two TEG® 6S assays, the DTI assay and Anti-Factor Xa (AFXa) assay, to detect anticoagulant effects and classify NOACs. Blood from healthy volunteer...
Source: Journal of Thrombosis and Thrombolysis - February 27, 2017 Category: Hematology Source Type: research

Comparison of 4 different strategies of DAPT after PCI in ACS real world population from a Northern Italy registry
AbstractAim of the study was to compare four different strategies of dual antiplatelet therapy (DAPT) in patients with acute coronary syndromes (ACS) treated with PCI. DAPT with Clopidogrel, Ticagrelor and Prasugrel has proved to be effective in patients with ACS treated with percutaneous coronary intervention (PCI) by reducing major adverse cardiovascular outcomes (MACE). However, the effect of the different strategies in a real-world population deserves further verification. A retrospective analysis of 2404 discharged ACS patients treated with PCI was performed, with a median follow-up of 1  year. The study population w...
Source: Journal of Thrombosis and Thrombolysis - October 9, 2017 Category: Hematology Source Type: research

Efficacy and safety of dabigatran in patients with atrial fibrillation scheduled for transoesophageal echocardiogram-guided direct electrical current cardioversion: a prospective propensity score-matched cohort study
This study investigated the long-term efficacy and safety of newly initiated anticoagulation with dabigatran versus uninterrupted vitamin K antagonist (VKA) therapy in patients with AF scheduled for transesophageal echocardiogram (TEE)-guided direct electrical current cardioversion (DCC). Consecutive adult patients with persistent AF scheduled to undergo DCC were included in the study. Patients received dabigatran 110  mg or 150 mg twice daily (bid) or VKA at therapeutic doses for at least 3 weeks before and 4 weeks after DCC. All patients underwent anamnestic, clinical, electrocardiographic and echocardiographic eva...
Source: Journal of Thrombosis and Thrombolysis - December 19, 2017 Category: Hematology Source Type: research

Cryptogenic acute limb ischemia: a retrospective cohort study defining a previously undescribed clinical entity
AbstractAcute limb ischemia (ALI) is generally secondary to cardioembolism or progression of peripheral vascular disease, however, a discrete population of patients with ALI exists in which no precipitant is ever established. Unlike cryptogenic arterial occlusion in other arenas, such as cryptogenic stroke, cryptogenic acute limb ischemia (cALI) has not been well-described, and no routine management has been established. The aim of this study is to describe patients with cALI, and the risk of recurrence based on the treatment they received. We performed a retrospective cohort study of patients evaluated for ALI at a single...
Source: Journal of Thrombosis and Thrombolysis - January 22, 2018 Category: Hematology Source Type: research

Direct oral anti-coagulants compared to vitamin-K antagonists in cardioversion of atrial fibrillation: an updated meta-analysis
AbstractPharmacological or electrical cardioversion allows immediate symptoms improvement in the setting of paroxysmal or persistent atrial fibrillation (AF), although the periprocedural risk of systemic embolism should be considered. Recently, there was a great interest on the safety and efficacy of direct oral anticoagulants (DOACs) when used for the cardioversion of non-valvular AF. We performed a random-effects meta-analysis of patients undergoing both electrical and pharmacologic cardioversion for non-valvular AF in the RE-LY, ROCKET-AF, ARISTOTLE, ENGAGE AF-TIMI 48, X-VeRT, ENSURE-AF, and EMANATE trials. We assessed ...
Source: Journal of Thrombosis and Thrombolysis - February 5, 2018 Category: Hematology Source Type: research

Prothrombin complex concentrate for reversal of direct factor Xa inhibitors prior to emergency surgery or invasive procedure: a retrospective study
AbstractDirect oral factor Xa (FXa) inhibitors are widely used for anticoagulation but a targeted antidote is not available. Four-factor prothrombin complex concentrate (4FPCC) has been shown in observational studies to support hemostasis in most patients with major bleeding related to FXa inhibitors with an acceptable rate of thromboembolic events. However, the effectiveness of 4FPCC for reversal of FXa inhibitors prior to emergency surgery or invasive procedures is unclear. A retrospective chart review was performed in patients that received 4FPCC at Hamilton General Hospital from 2015 to 2017. The primary effectiveness ...
Source: Journal of Thrombosis and Thrombolysis - March 21, 2018 Category: Hematology Source Type: research

Quality of direct oral anticoagulant prescribing in elderly patients with non-valvular atrial fibrillation: results from a large urban health system
AbstractNon-valvular atrial fibrillation (NVAF) is common in older adults. Oral anticoagulation is indicated to reduce the risk of stroke and systemic embolism, but it also poses a risk of bleeding, particularly in the elderly. Direct oral anticoagulants (DOACs) provide an alternative to warfarin and their use in the treatment of AF is growing. We conducted a retrospective cohort study to assess the quality of DOAC prescribing in elderly patients with NVAF in a large academic health system and to compare practice with consensus best practice recommendations. We searched the electronic medical record for patients  ≥ 6...
Source: Journal of Thrombosis and Thrombolysis - April 2, 2018 Category: Hematology Source Type: research

Four factor prothrombin complex concentrate for warfarin reversal in patients with left ventricular assist devices
AbstractContinuous flow left ventricular assist devices (CF-LVAD) require therapeutic anticoagulation which is often interrupted for procedures or bleeding. Prior to the availability of four factor prothrombin complex concentrate (4F-PCC) in the United States, warfarin was held and its effects reversed by vitamin K or fresh frozen plasma. We evaluated the use of 4F-PCC for temporary warfarin reversal in patients with CF-LVADs and assessed outcomes. This analysis is a retrospective study of CF-LVAD patients who received 4F-PCC for warfarin reversal in the setting of bleeding or need for urgent or elective procedures. Primar...
Source: Journal of Thrombosis and Thrombolysis - May 21, 2018 Category: Hematology Source Type: research

Ticagrelor versus clopidogrel after fibrinolytic therapy in patients with ST-elevation myocardial infarction: a systematic review and meta-analysis of randomized clinical trials
AbstractDual antiplatelet therapy with aspirin and clopidogrel are recommended as adjuncts to fibrinolytic-treated patients with ST-elevation myocardial infarction (STEMI). However, the role of switching to ticagrelor within 24  h of fibrinolytics compared with clopidogrel continuation in this setting is uncertain. Hence, we conducted a comprehensive search of electronic databases for all randomized clinical trials (RCTs) that evaluated the safety and efficacy of ticagrelor versus clopidogrel after fibrinolytic therapy in patients with STEMI. A random-effects model was used to calculate the risk ratios (RRs) and 95% confi...
Source: Journal of Thrombosis and Thrombolysis - September 10, 2018 Category: Hematology Source Type: research

Guided de-escalation of DAPT in acute coronary syndrome patients undergoing percutaneous coronary intervention with BVS implantation: a post-hoc analysis from the randomized TROPICAL-ACS trial
AbstractTo investigate the safety and efficacy of an early platelet function testing (PFT)-guided de-escalation of dual antiplatelet treatment (DAPT) in acute coronary syndrome (ACS) patients undergoing percutaneous coronary intervention (PCI) with bioresorbable vascular scaffolds (BVS). Early DAPT de-escalation is a new non-inferior alternative to 12-months DAPT in patients with biomarker positive ACS treated with stent implantation. In this post-hoc analysis of the TROPICAL-ACS trial, which randomized 2610 ACS patients to a PFT-guided DAPT de-escalation (switch from prasugrel to clopidogrel) or to control group (uniform ...
Source: Journal of Thrombosis and Thrombolysis - February 9, 2019 Category: Hematology Source Type: research

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