5,000 heart patients enrolled to unlock secrets of chronic blockages
NCT ID NCT06917378
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study will observe 5,000 adults in Taiwan who have a chronic total occlusion (CTO) — a complete, long-term blockage in a heart artery. Researchers will track how often procedures to open these blockages succeed and what complications occur. The goal is to learn which patient and artery features lead to better outcomes, without testing any new treatment.
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.
- Participants
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About 5,000 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2017
- Expected to finish
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Dec 2034
An estimate. End dates often move.
- Lead sponsor
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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.
Who is studied
1. Over 20 years old 2. Chronic total occlusion confirmed by coronary angiography, and noted for more than 3 months
- Ages
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20 to 120 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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. Over 20 years old 2. Chronic total occlusion confirmed by coronary angiography, and noted for more than 3 months Exclusion criteria Nil
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Get notified about this study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
3 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Chang Gung Memorial Hospital
RECRUITINGNew Taipei City, Taiwan
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National Taiwan University Hospital
RECRUITINGTaipei, Taiwan
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Taipei Veterans General Hospital
RECRUITINGTaipei, Taiwan
More trials for these conditions
Other studies related to the condition(s) this trial covers.
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- Heart stent breakthrough: cameras inside arteries could save thousands
- Heart stent study reveals long-term narrowing risks after complex artery procedure
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- Stents or pills for 80+ heart patients? new study seeks answers