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Heart stent study reveals long-term narrowing risks after complex artery procedure

NCT ID NCT07473596

Knowledge-focused Sponsor: Lauri Mansikkaniemi 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This completed study looked at 294 patients who had a procedure to open a completely blocked heart artery (CTO PCI) with a drug-coated stent. Researchers wanted to know how often the stents narrowed again over at least three years and what factors increased that risk. The study used CT scans and sometimes invasive angiography to check the stents.

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

294 people

The number who actually took part.

Started

Jan 2023

Finished

Feb 2025

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

Children (under 18), adults (18 to 64) and older adults (65 and over)

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.

Study inclusion criteria were the following: * Successful CTO PCI with a drug-eluting stent * Primary procedure minimum of 3 years prior to study date Of the included patients, CTO stent patency surveillance imaging with CCTA was conducted according to the following criteria. Patients were consecutive and prospectively recruited. Surveillance imaging inclusion criteria * Surviving patients ≤ 80 years old at the time of surveillance imaging * Communication in Finnish, Swedish or English Exclusion Criteria: * Target lesion revascularisation or angiographically verified ISR after CTO PCI * Malignancy with ongoing diagnostics or poor prognosis * Considerable functional impairment in activities of daily living * Presence of a clinically significant psychiatric disorder * Ongoing alcohol or drug abuse * Presence of a memory disorder or other clinically significant cognitive impairment * Coronary artery bypass surgery (CABG) after CTO PCI * Estimated glomerular filtration rate ≤40 ml/min * invasive coronary angiography performed less than 6 months prior to the surveillance imaging date CCTA results were reviewed by the interventional cardiologists of the study and ICA was offered to patients with: 1. ISR or an inconclusive finding within the CTO stent. 2. Anginal symptoms with either ≥ 50 % stenosis or an inconclusive finding in any native coronary artery or within a non-CTO stent.

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Conditions

The condition(s) this trial relates to.

coronary artery disorder

As listed by the trial registrant

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

Chronic total occlusion (CTO) Chronic total occlusion of coronary artery Coronary artery disease (CAD)

Contacts and locations

Locations

  • Helsinki University Central Hospital

    Helsinki, Uusimaa, 00290, Finland

More trials for these conditions

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