At 12 months, the primary end point — a composite of death from vascular causes, myocardial infarction, or stroke — had occurred in 9.8% of patients receiving ticagrelor as compared with 11.7% of those receiving clopidogrel (hazard ratio, 0.84; 95% confidence interval [CI], 0.77 to 0.92; P<0.001). Predefined hierarchical testing of secondary end points showed significant differences in the rates of other composite end points, as well as myocardial infarction alone (5.8% in the ticagrelor group vs. 6.9% in the clopidogrel group, P = 0.005) and death from vascular causes (4.0% vs. 5.1%, P = 0.001) but not stroke alone (1.5% vs. 1.3%, P = 0.22). The rate of death from any cause was also reduced with ticagrelor (4.5%, vs. 5.9% with clopid ogrel; P<0.001). No significant difference in the rates of major bleeding was found between the ticagrelor and clopidogrel groups (11.6% and 11.2%, respectively; P = 0.43), but ticagrelor was associated with a higher rate of major bleeding not related to coronary-artery bypass grafting (4.5% vs. 3.8%, P = 0.03), including more instances of fatal intracranial bleeding and fewer of fatal bleeding of other types. Conclusions In patients who have an acute coronary syndrome with or without ST-segment elevation, treatment with ticagrelor as compared with clopidogrel significantly reduced the rate of death from vascular causes, myocardial infarction, or stroke without an increase in the rate of overall major bleeding but with an increase in the rate of non– procedure-related bleeding. (ClinicalTrials.gov number, NCT00391872.)

/pdf/ticagrelor-versus-clopidogrel-in-patients-with-acute-44jy79lsmw.pdf

Ticagrelor versus Clopidogrel in Patients with Acute Coronary Syndromes

Ticagrelor versus Clopidogrel in Patients with Acute Coronary Syndromes.

Consensus and Future Directions on the Definition of High On-Treatment Platelet Reactivity to Adenosine Diphosphate

Developed in Collaboration With the American College of Emergency Physicians, Society for Cardiovascular Angiography and Interventions, and Society of Thoracic Surgeons

/pdf/2012-accf-aha-focused-update-of-the-guideline-for-the-l6c6a3orcw.pdf

2012 ACCF/AHA focused update of the guideline for the management of patients with unstable angina/non-ST-elevation myocardial infarction (updating the 2007 guideline and replacing the 2011 focused update): a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines.

Developed in Collaboration With the American College of Emergency Physicians, Society for Cardiovascular Angiography and Interventions, and the Society of Thoracic Surgeons. Endorsed by the American Association of Cardiovascular and Pulmonary Rehabilitation and the Society for Academic Emergency

https://www.ahajournals.org/doi/pdf/10.1161/CIR.0b013e318212bb8b

2011 ACCF/AHA Focused Update Incorporated Into the ACC/AHA 2007 Guidelines for the Management of Patients With Unstable Angina/Non–ST-Elevation Myocardial Infarction A Report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines

Stent thrombosis remains a significant pitfall of percutaneous coronary intervention (PCI). A recent trial observed that an adjusted loading dose (LD) of clopidogrel according to platelet monitoring decreases the rate of major adverse cardiovascular events after PCI. We investigated if such a strategy of a tailored clopidogrel LD according to platelet reactivity monitoring could decrease the rate of stent thrombosis. This multicenter prospective randomized study included 429 patients with a low clopidogrel response after a 600-mg LD undergoing PCI. Patients were randomized to a control group (n = 214) and to a vasodilator-stimulated phosphoprotein (VASP)-guided group (n = 215). In the VASP-guided group, patients received up to 3 additional 600-mg LDs of clopidogrel to obtain a VASP index 2 , p = 0.8, and 39% vs 33%, p = 0.2, respectively). PCI was performed in most patients for acute coronary syndrome in the 2 groups (52.3% vs 50.7%, p = 0.8). Despite a 2,400-mg LD of clopidogrel, 8% of patients in the VASP-guided group remained low responders. The rate of stent thrombosis was significantly lower in the VASP-guided group (0.5% vs 4.2%, p

Tailored clopidogrel loading dose according to platelet reactivity monitoring to prevent acute and subacute stent thrombosis.

Clopidogrel responsiveness (CR) following a loading dose (LD) predicts thrombotic events after percutaneous coronary interventions (PCI). Some of the mechanisms involved in large inter-individual variability in CR may be varied. We therefore postulated that there may be an intra-individual variability in CR. Two hundred and one patients receiving long-term therapy with aspirin and clopidogrel after drug-eluting stents PCI were prospectively included in this monocentre study along with any patient re-admitted within 12 months post-PCI. Platelet reactivity (PR) inhibition was assessed by the vasodilator phosphoprotein (VASP) index following a 600 mg loading dose of clopidogrel on each admission to determine CR (VASP 1 during the first admission and VASP 2 during re-admission). DeltaVASP = VASP 2 –VASP 1 was used to study intra-individual variability in CR. We observed that the response to a 600 mg LD of clopidogrel was poorly correlated within an individual (kappa = 0.33; p < 0.001 (n = 201)). Although most...

Intra-individual variability in clopidogrel responsiveness in coronary artery disease patients under long term therapy.

Incidence and predictors of microvascular dysfunction assessed by the index of microcirculatory resistance following primary PCI for ST-elevation myocardial infarction.

Caroline Burignat-Bonello

Papers

Tailored clopidogrel loading dose according to platelet reactivity monitoring to prevent acute and subacute stent thrombosis.

Intra-individual variability in clopidogrel responsiveness in coronary artery disease patients under long term therapy.

Incidence and predictors of microvascular dysfunction assessed by the index of microcirculatory resistance following primary PCI for ST-elevation myocardial infarction.