Coronary Artery Disease, Myocardial Infarction
Conditions
Keywords
Percutaneous Coronary Intervention (PCI), Glycoprotein IIb/IIIa blockade, Ischemic complications following PCI
Brief summary
This trial was designed to examine the efficacy of a brief versus a standard prolonged (18 hours) infusion of eptifibatide in preventing troponin I release following successful coronary stenting.
Detailed description
Percutaneous coronary intervention (PCI) is a common treatment for patients with severe ischemic heart disease. In the majority of cases, the potent anti-platelet agent eptifibatide is administered (bolus followed by infusion for 18 hours). The principal reason to use eptifibatide for PCI is to prevent platelet aggregation and the associated ischemia and myocardial infarction (MI). With improved laminar flow following stenting, prolonged infusion of eptifibatide may no longer be necessary. We hypothesize that after successful stenting with good angiographic results, patients can have eptifibatide discontinued immediately without a higher risk of adverse ischemic outcome, i.e. death, MI or unplanned target vessel revascularization (TVR) by 30 days. MI is defined as creatine kinase-MB (CK-MB) concentrations elevated to more than three times the upper limit of normal or new pathologic Q wave as seen on electrocardiograms (ECG). In order to prove this hypothesis, we estimate a sample size of 2,100 patients. Before embarking on a large-scale clinical trial, we propose a pilot study using serum troponin I elevation as a surrogate end-point. Troponin I is a sensitive biomarker of ischemic injury. The absence of troponin I release following PCI would suggest excellent short and intermediate term prognosis. For the pilot study, we seek to prove the hypothesis that following successful PCI with stenting, an abbreviated regimen of eptifibatide is not inferior to the standard infusion in preventing ischemic injury, defined as troponin I release if baseline value is normal, or as CK-MB more than 3 times upper limit of normal if baseline troponin I is elevated. For this pilot study, we estimate a sample size of 620 patients.
Interventions
DRUGeptifibatide
Sponsors
University of British Columbia
Cardiology Research UBC
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Investigator)
Eligibility
Sex/Gender
ALL
Healthy volunteers
No
Inclusion criteria
* Male and non-pregnant female subjects * 18 years of age or older * Received aspirin, clopidogrel, heparin (unfractionated or low molecular weight \[LMW\]) and eptifibatide * Had a successful PCI procedure with at least one stent deployed * Availability of a hospital bed
Exclusion criteria
* Use of alternative anti-thrombin therapy during PCI (e.g. bivalirudin) * High risk patients: * Acute ST elevation MI \< 48 hours (either direct PCI or rescue PCI) * Unprotected left main PCI * Obvious large thrombus on angiography * Use of rotablation, atherectomy, or thrombectomy devices * Unsatisfactory PCI results: * Final thrombolysis in myocardial infarction (TIMI) flow \< 3 * High grade dissection (\> type B, if not completely resolved at completion of PCI) * Evident or suspected thrombus * Distal embolization * Suboptimal stenting (\> 20% residual stenosis) * Side branch closure (≥ 1.5 mm branch or with associated symptoms) * Abrupt closure during procedure (if prolonged \> 15 min or not resolved at completion of PCI) * Clinical instability * Prolonged ischemia during PCI (\> 15 min) * Increased hazard of eptifibatide infusion: * Unsatisfactory deployment of a closure device (if used) * Large peri-procedure hematoma making the continuation of eptifibatide hazardous * Any condition that will increase the hazard of continuing eptifibatide * Operator discretion * No informed consent * Active participation in other research studies (unless with special exemption)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Ischemic injury is defined as troponin I release by 24 hours when the baseline troponin I is normal or by measuring creatine kinase (CK-MB) when the baseline troponin I is elevated. | 24 Hours |
Secondary
| Measure | Time frame |
|---|---|
| 30-day all-cause mortality, non-fatal myocardial infarction (MI), and unplanned target vessel revascularization (TVR) | 30 days |
| Composite event rate of non-coronary artery bypass graft (CABG) major bleeding, all-cause mortality, non-fatal MI, and urgent TVR at 30 days post PCI. | 30 days |
Countries
Canada
Outcome results
None listed