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DAPT Duration

Abstract

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Dual Antiplatelet Therapy Duration: Reconciling the Inconsistencies DAPT, Our Genome and Clopidogrel Patient-oriented composite endpoints and net adverse clinical events with ticagrelor monotherapy following percutaneous coronary intervention: Insights from the randomized GLOBAL LEADERS trial Causes, Timing, and Impact of Dual Antiplatelet Therapy Interruption for Surgery (from the Patterns of Non-adherence to Anti-platelet Regimens In Stented Patients Registry) 2016 ACC/AHA guideline focused update on duration of dual antiplatelet therapy in patients with coronary artery disease: A report of the American College of Cardiology/American Heart Association Task Force on Clinical Practice Guidelines Benefit of switching dual antiplatelet therapy after acute coronary syndrome: the TOPIC (timing of platelet inhibition after acute coronary syndrome) randomized study ACC/AHA Versus ESC Guidelines on Dual Antiplatelet Therapy JACC Guideline Comparison: JACC State-of-the-Art Review Ticagrelor plus aspirin for 1 month, followed by ticagrelor monotherapy for 23 months versus aspirin plus clopidogrel or ticagrelor for 12 months, followed by aspirin monotherapy for 12 months after implantation of a drug-eluting stent: a multicenter, open-label, randomized superiority trial
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Clinical Trial2018 Feb;45(2):225-233.

JOURNAL：J Thromb Thrombolysis. Article Link

Long-term pharmacodynamic effects of Ticagrelor versus Clopidogrel in fibrinolytic-treated STEMI patients undergoing early PCI

Yang A, Pon Q, Dehghani P et al. Keywords: Clopidogrel; Fibrinolysis; Myocardial infarction; Percutaneous coronary intervention; Platelet reactivity; Ticagrelor

ABSTRACT

The long-term pharmacodynamic effects of Ticagrelor versus Clopidogrel in patients undergoing early percutaneous coronary intervention (PCI) after fibrinolytic therapy is unknown. From May 2014 to August 2016, 212 patients undergoing PCI within 24 h of Tenecteplase (TNK), Aspirin, and Clopidogrel for ST-elevated myocardial infarction (STEMI) were randomized at four Canadian sites to receive additional Clopidogrel or Ticagrelor initiated prior to PCI. The platelet reactivity units (PRU) were measured with the Verify Now Assay before study drug administration (baseline), at 4 and 24 h post PCI, and follow-up appointment. A mixed-model analysis with time as the repeated measure and drug as the between-subjects factor was calculated using 2 separate 1 × 4 ANOVAs, with students t-tests used to compare drugs within each time point. Complete clinical follow-up data (median 115.0 days; IQR 80.3-168.8) was available in 50 patients (23.6%) randomized to either Clopidogrel (n = 23) or Ticagrelor (n = 27). Analyses revealed significant decreases in PRU from baseline to 4 h (261.4 vs. 71.7; Mdiff = - 189.7; p < 0.001) to 24 h (71.7 vs. 27.7; Mdiff = - 44.0; p < 0.001) to end of follow-up (27.7 vs.17.9; Mdiff = - 9.9. p = 0.016) for those randomized to Ticagrelor and significant decreases in PRU only from baseline to 4 h (271.3 vs. 200.8; Mdiff = - 70.5, p = < 0.001) in patients receiving Clopidogrel, and a significantly greater proportion of patients with adequate platelet inhibition (PRU < 208) on long-term follow-up (Clopidogrel, 82.6% vs. Ticagrelor, 100.0%; p = 0.038). Our results demonstrate that in patients undergoing PCI within 24 h of fibrinolysis for STEMI, Ticagrelor provides prolonged platelet inhibition compared with Clopidogrel.

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