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Poststroke venous thromboembolism and neutrophil activation: an illustrated review
Res Pract Thromb Haemost. 2023 Apr 29;7(4):100170. doi: 10.1016/j.rpth.2023.100170. eCollection 2023 May.ABSTRACTPatients with acute ischemic stroke are at a high risk of venous thromboembolism (VTE), such as deep vein thrombosis (DVT), estimated to affect approximately 80,000 patients with stroke each year in the United States. The prevalence of symptomatic DVT after acute stroke is approximately 10%. VTE is associated with increased rates of in-hospital death and disability, with higher prevalence of in-hospital complications and increased 1-year mortality in patients with stroke. Current guidelines recommend the use of ...
Source: Thrombosis and Haemostasis - June 5, 2023 Category: Hematology Authors: Nirav Dhanesha Junaid Ansari Nilesh Pandey Harpreet Kaur Chiranjiv Virk Karen Y Stokes Source Type: research

Metal ion chelation enhances tissue plasminogen activator (tPA)-induced thrombolysis: an in vitro and in vivo study
AbstractStroke is the third leading cause of death in the United States and the leading cause of adult disability. Despite enormous research efforts including many clinical trials, tissue plasminogen activator (tPA) remains the only FDA-approved treatment for acute ischemic stroke. Unfortunately, only 1 –3% of stroke patients in the US receive this therapy because of the narrow time window and severe side effects for using tPA. The most deadly and damaging side effect is the risk of intracranial bleeding or hemorrhage. For that reason, the dose of tPA and its overall administration are under tigh t control, which may com...
Source: Journal of Thrombosis and Thrombolysis - November 10, 2021 Category: Hematology Source Type: research

Antithrombotic therapy for chronic coronary syndrome and atrial fibrillation: less might be more
AbstractThe best strategy in atrial fibrillation (AF) after  >  12 months after an acute coronary syndrome or in patients with chronic coronary syndrome without an indication for interventional revascularization remains unclear. European guidelines generally recommend therapy with oral anticoagulation (OAC) alone, whereas North American guidelines advise com bination therapy consisting of OAC plus antiplatelet therapy in some patients. We performed a meta-analysis of available trials comparing these treatment strategies. The primary endpoint was major adverse cardiac events (MACE), secondary endpoints included maj...
Source: Journal of Thrombosis and Thrombolysis - December 2, 2019 Category: Hematology Source Type: research

Assessing patient preferences for switching from warfarin to direct oral anticoagulants
This study assessed patient preference for warfarin or DOAC based on a willingness to pay more for potential DOAC benefits. Current warfarin patients with atrial fibrillation or venous thromboembolism enrolled in the University of Utah Health Thrombosis Service were given a one-time electronic survey that assessed preferences between warfarin and DOACs using scenarios comparing effectiveness, safety, and convenience. When DOACs were preferred, patients were asked how much more they would be willing to pay monthly for the perceived advantages associated with DOACs. With 123 completed surveys, 68% of patients preferred to st...
Source: Journal of Thrombosis and Thrombolysis - October 19, 2019 Category: Hematology Source Type: research

Associations between use of prasugrel vs clopidogrel and outcomes by type of acute coronary syndrome: an analysis from the PROMETHEUS registry
AbstractWe sought to investigate the utilization of prasugrel and its association with outcomes relative to clopidogrel in three typical subgroups of ACS in a real-world setting. Prasugrel is superior to clopidogrel for reducing risk of ischemic events in acute coronary syndrome (ACS) patients undergoing percutaneous coronary intervention (PCI), but is associated with an increased risk of bleeding complications. PROMETHEUS was a retrospective multicenter observational study of 19,913 ACS patients undergoing PCI from 8 centers in the United States between 2010 and 2013. Major adverse cardiovascular events (MACE) were define...
Source: Journal of Thrombosis and Thrombolysis - June 8, 2019 Category: Hematology Source Type: research

Clinical Outcome Following Reinstitution of Anticoagulation after Major Gastrointestinal Bleed: A Single Institutional Analysis
Conclusion: Given the rising national trend on the use of anticoagulants for various medical necessities, it is imperative that a safe and efficient process be devised on reinstitution of anticoagulation post MGIB to guide Clinicians. Although our study represents a single institutional analysis, it concurs with recent studies that early resumption of anticoagulant following stabilization of MGIB is associated with lower thromboembolic events. Timing for resumption depends largely on the medical reason for anticoagulation; reinstitution by day 7 appear safe for patients on mechanical valve whereas after day 12 maybe approp...
Source: Blood - November 21, 2018 Category: Hematology Authors: Ezekwudo, D. E., Gaikazian, S., Anusim, N., Konde, A. S., Zakalik, D., Huben, M. T., Stender, M., Anderson, J., Jaiyesimi, I. Tags: 332. Antithrombotic Therapy: Poster I Source Type: research

Testing and monitoring direct oral anticoagulants
Direct oral anticoagulants (DOACs) have significantly improved the care of patients requiring anticoagulation. With similar or better efficacy and safety outcomes and easier use in the outpatient setting compared with the standard-of-care vitamin K antagonists and low molecular weight heparin, DOACs are now endorsed as first-line treatment of indications including prevention of stroke and systemic embolism in nonvalvular atrial fibrillation and treatment of venous thromboembolism. DOACs are easy-to-use oral agents that offer simple dosing and short half-lives, with no need to test levels because of the wide therapeutic win...
Source: Blood - November 8, 2018 Category: Hematology Authors: Connors, J. M. Tags: Perspectives, Thrombosis and Hemostasis 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

Direct Oral Anticoagulants in End-Stage Renal Disease
Semin Thromb Hemost DOI: 10.1055/s-0037-1621715Patients with end-stage renal disease (ESRD) were excluded from pivotal clinical trials with oral anticoagulants. While such patients are at an increased risk of venous and arterial thromboembolism, their risk of bleeding is also elevated. It is thus of little surprise that stroke prevention with vitamin K antagonists (VKAs) in ESRD patients with atrial fibrillation is controversial, with observational evidence ranging from beneficial to harmful. This uncertainty extends to the less studied use of VKAs for venous thromboembolism in ESRD. The direct oral anticoagulants (DOACs) ...
Source: Seminars in Thrombosis and Hemostasis - January 10, 2018 Category: Hematology Authors: Klil-Drori, Adi J. Tagalakis, Vicky Tags: Review Article Source Type: research

Comparison of the Ecarin Chromogenic Assay and Diluted Thrombin Time for Quantification of Dabigatran Concentrations
ConclusionsFor detection of levels below 50 ng/mL both tests have specificities of at least 96%, suggesting that they accurately detect even low levels of drug. Therefore, regardless of whether a chromogenic or clot‐based platform is preferred, the STA‐ECA‐II and dTT are useful tests for measuring dabigatran concentrations. Unfortunately, neither test is licensed by the United States Food and Drug Administration. Although approved in other jurisdictions, the dTT and STA‐ECA‐II are not widely or rapidly available in most hospitals. Therefore, cooperation between regulators and hospitals is urgently needed to rende...
Source: Journal of Thrombosis and Haemostasis - October 4, 2017 Category: Hematology Authors: Iqbal H. Jaffer, Noel Chan, Robin Roberts, James C. Fredenburgh, John W. Eikelboom, Jeffrey I. Weitz Tags: Original Article ‐ Coagulation Source Type: research

Comparison of the Ecarin Chromogenic Assay and Diluted Thrombin Time for Quantification of Dabigatran Concentrations.
CONCLUSIONS: For detection of levels below 50 ng/mL both tests have specificities of at least 96%, suggesting that they accurately detect even low levels of drug. Therefore, regardless of whether a chromogenic or clot-based platform is preferred, the STA-ECA-II and dTT are useful tests for measuring dabigatran concentrations. Unfortunately, neither test is licensed by the United States Food and Drug Administration. Although approved in other jurisdictions, the dTT and STA-ECA-II are not widely or rapidly available in most hospitals. Therefore, cooperation between regulators and hospitals is urgently needed to render these ...
Source: Thrombosis and Haemostasis - October 4, 2017 Category: Hematology Authors: Jaffer IH, Chan N, Roberts R, Fredenburgh JC, Eikelboom JW, Weitz JI Tags: J Thromb Haemost Source Type: research