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Stent showdown: which device heals arteries better after a heart attack?

NCT ID NCT03440801

Disease control Sponsor: Tokorozawa Heart Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study compared two drug-coated stents (Synergy and Xience) in 240 people who had a heart attack. The goal was to see which stent leads to better artery healing over three years, focusing on plaque buildup inside the stent. Both stents release a drug to prevent scarring, but one has a coating that dissolves over time.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
everolimus-eluting stents (Synergy and Xience)
What this could lead to
If one stent shows better long-term healing, it could reduce the risk of future heart problems after a heart attack.
What could go wrong
This is a small, completed study with 240 participants, so results may not apply to everyone. Stents carry risks like blood clots or re-narrowing.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

240 people

The number who actually took part.

Started

Jul 2017

Finished

Sep 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

20 to 90 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age ≥18 years 2. Primary PCI within 24 hours of symptom onset 3. ST-segment elevation of \> 1mm in \> 2 contiguous leads, or (presumably new) left bundle branch block, or true posterior MI with ST depression of \>1mm in \>2 contiguuoius anterior leads 4. Presence of at least one acute infarct artery target vessel with one or more coronary artery stenoses in a native coronary artery from 2.25 to 4.5 mm in diameter that can be covered with one or multiple stents Exclusion Criteria: 1. Female ofchildbearing potential (age \< 50 years and last menstruation within the last 12 months), who did not undergo tubal ligation, ovariectomy or hysterectomy. 2. Known intolerance to aspirin, clopidogrel, prasugrel, ticagrelor, heparin, stainless steel, cobalt chromium, platinum chromium, everolimus or contrast material 3. Inability to understand and provide informed consent 4. Currently participating in another trial before reaching first endpoint 5. Mechanical complications of acute myocardial infarction 6. Acute myocardial infarction secondary to stent thrombosis or restenosis 7. Planned surgery within 6 months of PCI unless dual antiplatelet therapy is maintained throughout the peri-surgical period 8. Noncardiac comorbid conditions are present with life expectancy \<3years or that may result in protocol noncompliance 9. History of bleeding diathesis or known coagulopathy 10. Use of oral anticoagulation 11. Age \>90 years 12. LV-function at index procedure \<=20% 13. Cancer under active treatment (chemotherapy) 14. Hemodynamic instability following primary PCI 15. Chronic kidey disease (Creatinine - Clearance \< 30ml/min) 16. OCT technically not feasible (severe calcification, tortuosity)

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Conditions

The condition(s) this trial relates to.

ST-elevation myocardial infarction

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Stemi - ST elevation myocardial infarction

Contacts and locations

Locations

  • Tokorozawa Heart Center

    Tokorozawa, 3591142, Japan

More trials for these conditions

Other studies related to the condition(s) this trial covers.