Comparison of MECHANISM of Early and Late Vascular Responses Following Treatment of ST-elevation Acute Myocardial Infarction With Two Different Everolimus-eluting Stents: Randomized Controlled Trial Between Biodegradable Polymer and Durable Polymer Stent (MECHANISM-AMI-RCT)

Study Overview
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Brief Summary
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To place two different everolimus-eluting stents (EES), a bioabsorbable polymer EES (Synergy®) and a permanent-type polymer EES (Xience®), randomly to the ST-elevation acute myocardial infarction (AMI) and to observe and compare the early and chronic vascular responses using the frequency domain optical coherence tomography (FD-OCT). The primary endpoint is the 2-week strut coverage rate by FD-OCT.

Official Title
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Comparison of MECHANISM of Early and Late Vascular Responses Following Treatment of ST-elevation Acute Myocardial Infarction With Two Different Everolimus-eluting Stents: Randomized Controlled Trial Between Biodegradable Polymer and Durable Polymer Stent

Conditions
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Coronary Artery Disease

Intervention / Treatment
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* Device: PCI


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients with new coronary lesion indicated for PCI using DES Patients whose age at acquisition of consent is 20 to less than 85 years Patients who themselves or whose representatives showed the written consent Patients who will undergo cardiac catheterization 2 weeks later (staged PCI on the other vessel or confirmatory angiography at the treated site) Exclusion Criteria: If the following exclusion criteria are satisfied, the patient should not be enrolled in this study even after acquisition of patient's consent: When the follow-up after 12 months is considered difficult (the patient's residence should also be considered) When there is no obvious ACS finding in angiography (decisions should be left to operator) Patients with shock Patients whose culprit lesion is the left main coronary trunk Lesion with the reference vascular diameter of <2.0 mm or ≥4.5 mm visually AMI that occurred newly at the site where a stent has already been placed Chronic renal failure in which the serum creatinine concentration at visit is ≥2.0 mg/dL Patients undergoing hemodialysis Tumor-bearing patients whose life prognosis is expected to be within 2 years Patients for whom the surgical operation requiring withdrawal of antiplatelet drug is scheduled within 3 months Female patients during pregnancy or scheduled to be pregnant Patients with a past history of the side effect of aspirin, clopidogrel or prasugrel (when the patient is confirmed for the safety of ticlopidine, this does not apply even if there is the side effect of clopidogrel or prasugrel)

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 84 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: The SYNERGY stent<br> | Device: PCI<br>* Coronary Intervention<br>|
| Active Comparator: Xience<br> | Device: PCI<br>* Coronary Intervention<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 2-weeks strut coverage rate by FD-OCT | In this clinical study, the 2-week covered strut rate by FD-OCT should be considered the primary endpoint, and the non-inferiority of Synergy® to the present standard treatment, Xience®, established in the control group in the treatment of STEMI, should be demonstrated. | 2-weeks |