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One-year outcome of a prospective trial stopping dual antiplatelet therapy at 3 months after everolimus-eluting cobalt-chromium stent implantation: ShortT and OPtimal duration of Dual AntiPlatelet Therapy after everolimus-eluting cobalt-chromium stent (STOPDAPT) trial A Platelet Function Modulator of Thrombin Activation Is Causally Linked to Cardiovascular Disease and Affects PAR4 Receptor Signaling Global Approach to High Bleeding Risk Patients With Polymer-Free Drug-Coated Coronary Stents: The LF II Study Polymer-based or Polymer-free Stents in Patients at High Bleeding Risk Rationale and design of the comparison between a P2Y12 inhibitor monotherapy versus dual antiplatelet therapy in patients undergoing implantation of coronary drug-eluting stents (SMART-CHOICE): A prospective multicenter randomized trial P2Y12 Inhibitor Monotherapy with Clopidogrel Versus Ticagrelor in Patients with Acute Coronary Syndrome Undergoing Percutaneous Coronary Intervention Use of clopidogrel with or without aspirin in patients taking oral anticoagulant therapy and undergoing percutaneous coronary intervention: an open-label, randomised, controlled trial Patient Selection and Clinical Outcomes in the STOPDAPT-2 Trial: An All-Comer Single-Center Registry During the Enrollment Period of the STOPDAPT-2 Randomized Controlled Trial

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Clinical TrialVolume 70, Issue 15, October 2017

JOURNAL：J Am Coll Cardiol. Article Link

Characterization of the Average Daily Ischemic and Bleeding Risk After Primary PCI for STEMI

Giustino G, Mehran R, Stone GW et al. Keywords: ST-segment elevation myocardial infarction; average daily rate; bleeding events; ischemic events; percutaneous coronary intervention

ABSTRACT

BACKGROUND - The risk of recurrent ischemic and bleeding events after primary percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI) may not be uniform over time, which may affect the benefit-to-risk ratio of guideline-recommended antithrombotic therapies in different intervals.

OBJECTIVES - This study sought to characterize the average daily ischemic rates (ADIRs) and average daily bleeding rates (ADBRs) within the first year after primary PCI for STEMI.

METHODS - Among 3,602 patients with STEMI who were enrolled in the HORIZONS-AMI (Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction) trial, all ischemic and bleeding events, including recurrent events, were classified according to the timing of their occurrence as acute (≤24 h after PCI), subacute (1 day to 30 days), and late (30 days to 1 year). Patients were treated with aspirin and clopidogrel for the entire year. ADIRs included cardiac death, reinfarction, and definite stent thrombosis. ADBRs included non–coronary artery bypass graft–related Thrombolysis In Myocardial Infarction major and minor bleeding. ADIRs and ADBRs were calculated as the total number of events divided by the number of patient-days of follow-up in each interval assuming a Poisson distribution. Generalized estimating equations were used to test the absolute least square mean differences (LSMD) between ADIRs and ADBRs.

RESULTS- The ADIR and ADBR both exponentially decreased from the acute to the late periods (p < 0.0001). Although there were no significant differences in ADIR and ADBR in the acute phase (LSMD: +0.11%; 95% confidence interval [CI]: −0.35% to 0.58%; p = 0.63), the ADBR was greater than the ADIR in the subacute phase (LSMD: −0.39%; 95% CI: −0.58% to −0.20%; p < 0.0001). In the late phase, the ADIR exceeded the ADBR (LSMD: +1.51%; 95% CI: 1.04% to 1.98%; p < 0.0001).

CONCLUSIONS - After primary PCI, the ADIR and ADBR both markedly decreased over time. Although the rates for bleeding exceeded those for ischemia within 30 days, the daily risk of ischemia significantly exceeded the daily risk of bleeding beyond 30 days, supporting the use of intensified platelet inhibition during the first year after STEMI.

Abstract

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Characterization of the Average Daily Ischemic and Bleeding Risk After Primary PCI for STEMI

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