• Filter By:
• Specialty
• Source
• Condition
• Cancer
• Infectious Disease
• Drug
• Training
• Management
• Procedure
• Therapy
• Vaccine
• Nutrition
• Country

Clopidogrel use and smoking cessation result in lower coated-platelet levels after stroke.
Authors: Kirkpatrick AC, Vincent AS, Dale GL, Prodan CI Abstract Coated-platelets are a subset of highly procoagulant platelets elevated in patients with non-lacunar ischemic stroke and associated with stroke recurrence. Cross-sectional studies in controls have shown that smoking is associated with higher coated-platelet levels while chronic use of serotonin reuptake inhibitors (SSRIs), statins or aspirin is associated with lower coated-platelet levels. We now investigate if initiation of treatment with SSRIs, statins, clopidogrel, aspirin or oral anticoagulants and smoking cessation impacts coated-platelet levels ...
Source: Platelets - May 4, 2019 Category: Hematology Tags: Platelets Source Type: research

Platelet function testing in transient ischaemic attack and ischaemic stroke: A comprehensive systematic review of the literature.
Authors: Lim ST, Coughlan CA, Murphy SJ, Fernandez-Cadenas I, Montaner J, Thijs V, Marquardt L, McCabe DJ Abstract The majority of patients with ischaemic cerebrovascular disease (CVD) are not protected from further vascular events with antiplatelet therapy. Measurement of inhibition of platelet function ex vivo on antiplatelet therapy, using laboratory tests that correlate with the clinical effectiveness of these agents, would potentially enable physicians to tailor antiplatelet therapy to suit individuals. A systematic review of the literature was performed to collate all available data on ex vivo platelet functi...
Source: Platelets - February 14, 2016 Category: Hematology Tags: Platelets Source Type: research

Antiplatelet effects of clopidogrel and aspirin after interventional patent foramen ovale/ atrium septum defect closure.
In this study, we aimed to analyze the incidence of high on-treatment platelet reactivity (HTPR) to antiplatelet medication in patients undergoing PFO/ASD closure as well as clinical complications and thrombus formation on the occluder during six-month follow-up. This hypothesis generating pilot study was observed, which included 140 patients undergoing PFO/ASD closure. The primary endpoint was pharmacodynamic response to antiplatelet medication. A composite of death, myocardial infarction, bleeding, stroke and thrombus formation on the occluder during six-month follow-up was the secondary endpoint. HTPR to clopidogrel was...
Source: Platelets - February 14, 2016 Category: Hematology Tags: Platelets Source Type: research

Clinical utility of remote platelet function measurement using P-selectin: assessment of aspirin, clopidogrel, and prasugrel and bleeding disorders.
Authors: Bath PM, May J, Heptinstall S Abstract Vascular diseases such as myocardial infarction and ischemic stroke are associated with increased platelet function whilst the risk of recurrence is reduced by antiplatelet agents such as aspirin, clopidogrel, and prasugrel. However, some patients exhibit high platelet reactivity, especially with clopidogrel. Existing platelet function tests may not be ideal in that they can be expensive, are often time consuming, and measurements must be made near to the patient and within a few hours of blood collection. Platelet activation leads to translocation of P-selectin from ...
Source: Platelets - April 20, 2018 Category: Hematology Tags: Platelets Source Type: research

Variant recurrent risk among stroke patients with different CYP2C19 phenotypes and treated with clopidogrel
Platelets, Ahead of Print.
Source: Platelets - September 10, 2014 Category: Hematology Tags: article Source Type: research

How to test the effect of aspirin and clopidogrel in patients on dual antiplatelet therapy?
Authors: Bagoly Z, Homoródi N, Kovács EG, Sarkady F, Csiba L, Édes I, Muszbek L Abstract Dual antiplatelet therapy with clopidogrel and aspirin is frequently used for the prevention of recurrent ischemic events. Various laboratory methods are used to detect the effect of these drugs administered in monotherapy, however their value in dual therapy has not been explored. Here, we determined which methods used for testing the effect of clopidogrel or aspirin are influenced by the other antiplatelet agent. One arm of the study included 53 ischemic stroke patients being on clopidogrel monotherapy showing effective in...
Source: Platelets - February 14, 2016 Category: Hematology Tags: Platelets Source Type: research

Sepsis favors high-on-clopidogrel platelet reactivity.
Authors: Akinosoglou K, Perperis A, Theodoraki S, Alexopoulos D, Gogos C Abstract High-on-treatment platelet reactivity (HPR) is associated with ischemic events in patients on antiplatelet therapy with a history of cardiovascular disease. On the other hand, recent data have associated sepsis with adverse cardiovascular events in patients admitted with bacteremia or respiratory infection. We aimed to assess P2Y12-mediated platelet reactivity (PR) during sepsis and recovery in patients under clopidogrel. This was a prospective observational study. Incoming patients presenting with signs/symptoms of sepsis already on ...
Source: Platelets - June 23, 2017 Category: Hematology Tags: Platelets Source Type: research

Equilibrative nucleoside transporter 1 gene polymorphisms and clinical outcomes following acute coronary syndromes: findings from the PLATelet inhibition and patient Outcomes (PLATO) study.
Authors: Parker WAE, Eriksson N, Becker RC, Voora D, Åkerblom A, Himmelmann A, James SK, Wallentin L, Storey RF, PLATO Investigators Abstract In the PLATelet inhibition and patient Outcomes (PLATO) study, the P2Y12 inhibitors ticagrelor and clopidogrel were compared in the treatment of acute coronary syndromes (ACS). Ticagrelor was shown to reduce occurrence of the primary end point - a composite of death from vascular causes, myocardial infarction, or stroke - compared to clopidogrel. Ticagrelor's pleiotropic effects on reuptake of adenosine via inhibition of equilibrative nucleoside transporter 1 (ENT1) have bee...
Source: Platelets - June 2, 2018 Category: Hematology Tags: Platelets Source Type: research

Pharmacodynamic safety of clopidogrel monotherapy in patients under oral anticoagulation with a vitamin K antagonist undergoing coronary stent implantation.
This study enrolled 100 patients on aspirin plus clopidogrel (DAPT-cohort, without indication for VKA) and 100 patients on clopidogrel monotherapy plus phenprocoumon (OAC-cohort) undergoing elective PCI. Platelet reactivity was assessed by impedance aggregometry on day 1 following PCI. Ischemic (death, stroke, or myocardial infarction) and bleeding (BARC 2-5) events within 12 months were compared in a propensity score adjusted model. Platelet reactivity was not different in the OAC- and DAPT-cohort (187 [127-242] vs. 167 [126-218] AU×min; p = 0.23). Overall, 17 ischemic and 34 bleeding events were recorded during follo...
Source: Platelets - September 14, 2018 Category: Hematology Tags: Platelets Source Type: research

De-escalation versus standard dual antiplatelet therapy in patients undergoing percutaneous coronary intervention: a systematic review and meta-analysis.
In conclusion, de-escalation of antiplatelet therapy is associated with nonsignificant differences in both ischemic events and major bleeding compared with standard potent antiplatelet therapy in patients undergoing percutaneous coronary intervention. The feasibility and even superiority of this strategy need to be elucidated by further randomized trials. PMID: 30759033 [PubMed - as supplied by publisher]
Source: Platelets - February 15, 2019 Category: Hematology Tags: Platelets Source Type: research

Efficacy and safety of switching from ticagrelor to clopidogrel during the early and late phase in acute coronary syndrome patients after percutaneous coronary intervention.
The objective of the present study was to investigate the efficacy and safety of de-escalation in early and late phase after percutaneous coronary intervention (PCI). We performed a retrospective study of 4678 ACS patients from March 2016 to April 2017 who initially received ticagrelor then de-escalated to clopidogrel and categorized them into Group 1: early phase (1-30 days) and Group 2: late phase (>30 days-1 year) switching groups. The primary efficacy endpoints included cardiovascular death, definite/probable stent thrombosis, myocardial infarction, unplanned revascularization, and stroke. The safety endpoint was...
Source: Platelets - May 4, 2019 Category: Hematology Tags: Platelets Source Type: research

Effects of cigarette smoking on older chinese men treated with clopidogrel monotherapy or aspirin monotherapy: a prospective study.
Authors: Cai Y, Xu W, Liu H, Wang F, Duan L, Li H, Li M, Li Y, Han L, Xiao H Abstract We investigated the comparative effects of smoking status on outcomes in older Chinese men receiving aspirin or clopidogrel monotherapy. This was a prospective observational study of outcomes in 668 men aged ≥ 60 years undergoing annual health examination in the Chinese People's Liberation Army General Hospital from March-April 2017. All patients received regular treatment with aspirin or clopidogrel. Platelet aggregation and phenotyping for rs762551 were measured in all patients. We recorded all major adverse cardiovascular an...
Source: Platelets - September 28, 2019 Category: Hematology Tags: Platelets Source Type: research

Benefit-risk profile of extended dual antiplatelet therapy beyond 1 year in patients with high risk of ischemic or bleeding events after PCI.
Authors: Wang HY, Gao RL, Xu B, Yang YJ, Yin D, Wang Y, Dou KF Abstract The benefits and harms of dual antiplatelet therapy (DAPT) continuation with aspirin and clopidogrel beyond 1 year after percutaneous coronary intervention (PCI) with drug-eluting stent (DES) implantation for high ischemic or bleeding risk patients remain unclear. All consecutive patients undergoing PCI were prospectively included in the Fuwai PCI Registry from January 2013 to December 2013. We evaluated 7521 patients who were at high risk for thrombotic or hemorrhagic complications and were events free at 1 year after the index procedure. "TWI...
Source: Platelets - June 7, 2020 Category: Hematology Tags: Platelets Source Type: research

The efficacy and safety of CYP2C19 genotype-guided antiplatelet therapy compared with conventional antiplatelet therapy in patients with acute coronary syndrome or undergoing percutaneous coronary intervention: A meta-analysis of randomized controlled trials.
This study aimed to evaluate the efficacy and safety of CYP2C19 genotype-guided antiplatelet therapy in patients with ACS or undergoing PCI. PubMed, EMBASE, the Cochrane Library and clinicaltrials.gov were searched to identify randomized controlled trials (RCTs) comparing CYP2C19 genotype-guided antiplatelet therapy with conventional therapy in patients with ACS or undergoing PCI. Eight RCTs involving 6708 patients were included in this meta-analysis. CYP2C19 genotype-guided antiplatelet therapy was slightly superior to the conventional antiplatelet therapy in reducing the risk of MACE [RR(95%CI): 0.71(0.51-0.98), p = .04...
Source: Platelets - June 18, 2020 Category: Hematology Tags: Platelets Source Type: research

Risk of major adverse cardiovascular events of CYP2C19 loss-of-function genotype guided prasugrel/ticagrelor vs clopidogrel therapy for acute coronary syndrome patients undergoing percutaneous coronary intervention: a meta-analysis.
Authors: Biswas M, Kali MSK, Biswas TK, Ibrahim B Abstract The most effective antiplatelet treatments for acute coronary syndrome (ACS) patients carrying CYP2C19 loss-of-function (LoF) alleles undergoing percutaneous coronary intervention (PCI) is still debating and conflicting. It was aimed to compare the efficacy and safety endpoints for these patients treated with alternative P2Y12 receptor blockers (e.g. prasugrel or ticagrelor) against clopidogrel. Literature was searched in PubMed, Cochrane library, Synapse and 1000 Genomes databases following PRISMA guidelines for identifying relevant studies. Aggregated ris...
Source: Platelets - July 17, 2020 Category: Hematology Tags: Platelets Source Type: research