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Sökning: WFRF:(Harrington Robert A) > (2010-2014)

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1.
  • Lopes, Renato D., et al. (författare)
  • Highlights from the III International Symposium of Thrombosis and Anticoagulation (ISTA), October 14-16, 2010, Sao Paulo, Brazil
  • 2011
  • Ingår i: Journal of Thrombosis and Thrombolysis. - : Springer Science and Business Media LLC. - 0929-5305 .- 1573-742X. ; 32:2, s. 242-266
  • Tidskriftsartikel (refereegranskat)abstract
    • To discuss and share knowledge around advances in the care of patients with thrombotic disorders, the Third International Symposium of Thrombosis and Anticoagulation was held in So Paulo, Brazil, from October 14-16, 2010. This scientific program was developed by clinicians for clinicians, and was promoted by four major clinical research institutes: the Brazilian Clinical Research Institute, the Duke Clinical Research Institute of the Duke University School of Medicine, the Canadian VIGOUR Centre, and the Uppsala Clinical Research Center. Comprising 3 days of academic presentations and open discussion, the symposium had as its primary goal to educate, motivate, and inspire internists, cardiologists, hematologists, and other physicians by convening national and international visionaries, thought-leaders, and dedicated clinician-scientists. This paper summarizes the symposium proceedings.
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2.
  • Melloni, Chiara, et al. (författare)
  • Safety and efficacy of adjusted-dose eptifibatide in patients with acute coronary syndromes and reduced renal function
  • 2011
  • Ingår i: American Heart Journal. - : Elsevier BV. - 0002-8703 .- 1097-6744. ; 162:5, s. 884-892
  • Tidskriftsartikel (refereegranskat)abstract
    • Background Dose adjustment of renally excreted antithrombotic drugs is recommended for patients with reduced renal function. We examined the influence of dose modification on bleeding and efficacy. Methods Based on initial study drug infusion rate, Early GP IIb/IIIa Inhibition in non-ST-segment elevation acute coronary syndromes (EARLY ACS) patients were categorized into groups: standard dose (2 mu g/kg/min; estimated creatinine clearance [eCrCl] >= 50 ml/min), adjusted dose (1 mu g/kg/min; eCrCl <50 ml/min, per protocol), excess dose (2 mu g/kg/min; eCrCl <50 ml/min). We explored relationships among initial dosing, randomized treatment assignment, and bleeding and ischemic end points (96-h composite of death, myocardial infarction [MI], recurrent ischemia requiring urgent revascularization or thrombotic bailout, and 30-d death or MI). Results Of 8,708 patients with eCrCl and dosing data, 19% had eCrCl <50 ml/min. Of these, 13% received adjusted dose eptifibatide and 6% received an excess dose. Across all dosing groups, no significant reductions were found in ischemic end points between early versus delayed provisional eptifibatide (OR 1.14, 95% CI 0.80-1.65; OR 1.13, 95% CI 0.81-1.56, respectively, for 96-h and 30-d composite end points). Bleeding risk was not significantly increased in the early versus delayed provisional treatment group in either the adjusted (OR 1.50, 95% CI 0.95-2.39) or excess dose group (OR 1.67, 95% CI 0.85-3.39). There were no significant interactions between dose group and treatment strategy on bleeding or efficacy. Conclusion Similar to observations in practice, despite guidelines recommendations and protocol guidance, 34% of EARLY ACS patients with reduced renal function failed to receive an appropriately adjusted study drug infusion. Use of an appropriately adjusted eptifibatide infusion was not associated with expected reductions in bleeding among patients with renal insufficiency.
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3.
  • Roe, Matthew T., et al. (författare)
  • Regional Patterns of Use of a Medical Management Strategy for Patients With Non-ST-Segment Elevation Acute Coronary Syndromes : Insights From the EARLY ACS Trial
  • 2012
  • Ingår i: Circulation. Cardiovascular Quality and Outcomes. - 1941-7713 .- 1941-7705. ; 5:2, s. 205-213
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Regional differences in the profile and prognosis of non-ST-segment elevation acute coronary syndrome (NSTE ACS) patients treated with medical management after angiography remain uncertain.Methods and Results: Using data from the Early Glycoprotein IIb/IIIa Inhibition in Non-ST-Segment Elevation Acute Coronary Syndromes (EARLY ACS) trial, we examined regional variations in the use of an in-hospital medical management strategy in NSTE ACS patients who had significant coronary artery disease (CAD) identified during angiography, factors associated with the use of a medical management strategy, and 1-year mortality rates. Of 9406 patients, 8387 (89%) underwent angiography and had significant CAD; thereafter, 1766 (21%) were treated solely with a medical management strategy (range: 18% to 23% across 4 major geographic regions). Factors most strongly associated with a medical management strategy were negative baseline troponin values, prior coronary artery bypass grafting, lower baseline hemoglobin values, and greater number of diseased vessels; region was not a significant factor. One-year mortality was higher among patients treated with a medical management strategy compared with those who underwent revascularization (7.8% versus 3.6%; adjusted hazard ratio, 1.46; 95% CI, 1.21-1.76), with no significant interaction by region (interaction probability value=0.42).Conclusions: Approximately 20% of NSTE ACS patients with significant CAD in an international trial were treated solely with an in-hospital medical management strategy after early angiography, with no regional differences in factors associated with medical management or the risk of 1-year mortality. These findings have important implications for the conduct of future clinical trials, and highlight global similarities in the profile and prognosis of medically managed NSTE ACS patients.
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4.
  • Wang, Tracy Y., et al. (författare)
  • Upstream Clopidogrel Use and the Efficacy and Safety of Early Eptifibatide Treatment in Patients With Acute Coronary Syndrome An Analysis From the Early Glycoprotein IIb/IIIa Inhibition in Patients With Non-ST-Segment Elevation Acute Coronary Syndrome (EARLY ACS) Trial
  • 2011
  • Ingår i: Circulation. - 0009-7322 .- 1524-4539. ; 126:7, s. 722-730
  • Tidskriftsartikel (refereegranskat)abstract
    • Background-In the Early Glycoprotein IIb/IIIa Inhibition in Patients with Non-ST-Segment Elevation Acute Coronary Syndrome (EARLY ACS) trial, routine preangiography eptifibatide use was not superior to delayed provisional use but led to more bleeding. This analysis examines efficacy and safety of early eptifibatide in the setting of concurrent upstream clopidogrel use. Methods and Results-In EARLY-ACS, clopidogrel use and timing were determined by treating physicians, but randomization to early eptifibatide versus placebo was stratified by the intent to use upstream clopidogrel. Among 9166 non-ST-elevation acute coronary syndrome patients who underwent coronary angiography, intent to use upstream clopidogrel was declared in 6895 (75%), and 7068 (77%) received upstream clopidogrel. After multivariable adjustment, intended upstream clopidogrel use did not differentially influence the effect of early eptifibatide on the primary end point of 96-hour death/myocardial infarction/recurrent ischemia requiring urgent revascularization/thrombotic bailout (interaction P = 0.988). Early eptifibatide use reduced 30-day death/myocardial infarction among patients with intended upstream clopidogrel (adjusted odds ratio 0.85; 95% confidence interval 0.73 to 0.99) but not among those without intended upstream clopidogrel use (adjusted odds ratio 1.02; 95% confidence interval 0.80 to 1.30). However, the clopidogrel by randomized treatment interaction term was not significant (P = 0.23). Thrombolysis in Myocardial Infarction major bleeding risk was increased with early eptifibatide in the setting of upstream clopidogrel use. Results were similar using actual clopidogrel treatment strata. Conclusions-Routine early eptifibatide use, compared with delayed provisional use, may be associated with lower 30-day ischemic risk in non-ST-elevation acute coronary syndrome patients also treated with clopidogrel before angiography. The benefit-risk ratio of intensive platelet inhibition with combined early use of antiplatelet agents needs further evaluation in prospective randomized trials.
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5.
  • Giraldez, Roberto R., et al. (författare)
  • Prevalence and clinical outcomes of undiagnosed diabetes mellitus and prediabetes among patients with high-risk non-ST-segment elevation acute coronary syndrome
  • 2013
  • Ingår i: American Heart Journal. - : Elsevier BV. - 0002-8703 .- 1097-6744. ; 165:6, s. 918-925.e2
  • Tidskriftsartikel (refereegranskat)abstract
    • Background We examined the prevalence of undiagnosed diabetes or prediabetes and associations with ischemic outcomes among non-ST-segment elevation acute coronary syndrome (ACS) patients. Methods We categorized 8795 EARLY ACS trial patients into one of the following groups: "known diabetes" (n = 2860 [32.5%]; reported on the case report form), "undiagnosed diabetes" (n = 1069 [12.2%]; no diabetes history and fasting glucose >= 126 mg/dL or hemoglobin A(1c) >= 6.5%), "prediabetes" (n = 947 [10.8%]; fasting glucose >= 110 to <126 mg/dL, or " normal" (n = 3919 [44.5%]). Adjusted associations of known diabetes, undiagnosed diabetes, and prediabetes (versus normal) with 30-day and 1-year outcomes were determined. Results Undiagnosed diabetes was associated with greater 30-day death or myocardial infarction (MI) (ORadj 1.28, 95% CI 1.05-1.57), driven primarily by greater 30-day mortality (ORadj 1.65, 95% CI 1.09-2.48). Known diabetic patients had 30-day death or MI outcomes similar to those of normal patients, but 30-day mortality was higher (ORadj 1.40, 95% CI 1.01-1.93). Prediabetic patients had 30-day death or MI outcomes similar to those of normal patients. One-year mortality was greater among known diabetic patients (HRadj 1.38, 95% CI 1.13-1.67) but not among those with undiagnosed diabetes or prediabetes. Conclusions Undiagnosed diabetes and prediabetes were common among high-risk non-ST-segment elevation ACS patients. Routine screening for undiagnosed diabetes may be useful since these patients seem to have worse short-term outcomes and deserve consideration of alternative management strategies.
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6.
  • Goodman, Shaun G., et al. (författare)
  • Association of Proton Pump Inhibitor Use on Cardiovascular Outcomes With Clopidogrel and Ticagrelor : Outcomes With Clopidogrel and Ticagrelor
  • 2012
  • Ingår i: Circulation. - 0009-7322 .- 1524-4539. ; 125:8, s. 978-986
  • Tidskriftsartikel (refereegranskat)abstract
    • Background-The clinical significance of the interaction between clopidogrel and proton pump inhibitors (PPIs) remains unclear. Methods and Results-We examined the relationship between PPI use and 1-year cardiovascular events (cardiovascular death, myocardial infarction, or stroke) in patients with acute coronary syndrome randomized to clopidogrel or ticagrelor in a prespecified, nonrandomized subgroup analysis of the Platelet Inhibition and Patient Outcomes (PLATO) trial. The primary end point rates were higher for individuals on a PPI (n = 6539) compared with those not on a PPI (n = 12 060) at randomization in both the clopidogrel (13.0% versus 10.9%; adjusted hazard ratio [HR], 1.20; 95% confidence interval [CI], 1.04 -1.38) and ticagrelor (11.0% versus 9.2%; HR, 1.24; 95% CI, 1.07-1.45) groups. Patients on non-PPI gastrointestinal drugs had similar primary end point rates compared with those on a PPI (PPI versus non-PPI gastrointestinal treatment: clopidogrel, HR, 0.98; 95% CI, 0.79-1.23; ticagrelor, HR, 0.89; 95% CI, 0.73-1.10). In contrast, patients on no gastric therapy had a significantly lower primary end point rate (PPI versus no gastrointestinal treatment: clopidogrel, HR, 1.29; 95% CI, 1.12-1.49; ticagrelor, HR, 1.30; 95% CI, 1.14-1.49). Conclusions-The use of a PPI was independently associated with a higher rate of cardiovascular events in patients with acute coronary syndrome receiving clopidogrel. However, a similar association was observed between cardiovascular events and PPI use during ticagrelor treatment and with other non-PPI gastrointestinal treatment. Therefore, in the PLATO trial, the association between PPI use and adverse events may be due to confounding, with PPI use more of a marker for, than a cause of, higher rates of cardiovascular events.
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8.
  • Mahaffey, Kenneth W., et al. (författare)
  • Ticagrelor Effects on Myocardial Infarction and the Impact of Event Adjudication in the PLATO (Platelet Inhibition and Patient Outcomes) Trial
  • 2014
  • Ingår i: Journal of the American College of Cardiology. - : Elsevier BV. - 0735-1097 .- 1558-3597. ; 63:15, s. 1493-1499
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives This study sought to report the treatment effect of ticagrelor on myocardial infarction (MI) and the strategy for and impact of event adjudication in the PLATO (Platelet Inhibition and Patient Outcomes) trial. Background In PLATO, ticagrelor reduced cardiovascular death, MI, or stroke in patients with acute coronary syndromes (ACS). Methods A CIinical events committee (CEC) prospectively defined and adjudicated all suspected MI events, on the basis of events reported by investigators and by triggers on biomarkers. Treatment comparisons used CEC-adjudicated data, and per protocol, exCIuded silent MI. Results Overall, 1,299 (610 ticagrelor, 689 CIopidogrel) MIs reported by the CEC occurred during the trial. Of these, 1,097 (504 ticagrelor, 593 CIopidogrel) contributed to the primary composite endpoint. Site investigators reported 1,198 (580 ticagrelor, 618 CIopidogrel) MIs. Ticagrelor significantly reduced overall MI rates (12-month CEC-adjudicated Kaplan-Meier rates: 5.8% ticagrelor, 6.9% CIopidogrel; hazard ratio [HR]: 0.84; 95% confidence interval [CI]: 0.75 to 0.95). Nonprocedural MI (HR: 0.86; 95% CI: 0.74 to 1.01) and MI related to percutaneous coronary intervention or stent thrombosis tended to be lower with ticagrelor. MIs related to coronary artery bypass graft surgery were few, but numerical excess was observed in patients assigned ticagrelor. Analyses of overall MIs using investigator-reported data showed similar results but did not reach statistical significance (HR: 0.88; 95% CI: 0.78 to 1.00). ConCIusions In patients with ACS, ticagrelor significantly reduced the incidence of MI compared with CIopidogrel, with consistent results across most MI subtypes. CEC procedures identified more MI endpoints compared with site investigators. (A Comparison of Ticagrelor [AZD6140] and CIopidogrel in Patients With Acute Coronary Syndrome [PLATO]; NCT00391872)
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10.
  • Steg, P. Gabriel, et al. (författare)
  • Stent Thrombosis With Ticagrelor Versus Clopidogrel in Patients With Acute Coronary Syndromes : An Analysis From the Prospective, Randomized PLATO Trial
  • 2013
  • Ingår i: Circulation. - 0009-7322 .- 1524-4539. ; 128:10, s. 1055-1065
  • Tidskriftsartikel (refereegranskat)abstract
    • Background We aimed to describe the effects of ticagrelor versus clopidogrel on stent thrombosis in the Platelet Inhibition and Patient Outcomes (PLATO) trial. Methods and Results Of 18624 patients hospitalized for acute coronary syndromes, 11289 (61%) had at least 1 intracoronary stent. Ticagrelor reduced stent thrombosis compared with clopidogrel across all definitions: definite, 1.37% (n=71) versus 1.93% (n=105; hazard ratio [HR], 0.67; 95% confidence interval [CI], 0.50-0.90; P=0.0091); definite or probable, 2.21% (n=118) versus 2.87% (n=157; HR, 0.75; 95% CI, 0.59-0.95; P=0.017); and definite, probable, and possible, 2.94% (n=154) versus 3.77 (n=201; HR, 0.77; 95% CI, 0.62-0.95). The reduction in definite stent thrombosis was consistent regardless of acute coronary syndrome type, presence of diabetes mellitus, stent type (drug-eluting or bare metal stent), CYP2C19 genetic status, loading dose of aspirin, dose of clopidogrel before randomization, and use of glycoprotein IIb/IIIa inhibitors at randomization. The reduction in stent thrombosis with ticagrelor was numerically greater for late (>30 days; HR, 0.48; 95% CI, 0.24-0.96) and subacute (4 hours-30 days; HR, 0.60; 95% CI, 0.39-0.93) compared with acute (<24 hours; HR, 0.94; 95% CI, 0.43-2.05) stent thrombosis or for patients compliant to therapy (ie, taking blinded study treatment 80% of the time) compared with less compliant patients. Randomization to ticagrelor was a strong independent inverse predictor of definite stent thrombosis (HR, 0.65; 95% CI, 0.48-0.88). Conclusion Ticagrelor compared with clopidogrel reduces the incidence of stent thrombosis in patients with acute coronary syndromes, with consistent benefit across a broad range of patient, stent, and treatment characteristics. Clinical Trial Registration URL: . Unique identifier: NCT00391872.
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