Heart artery blockage showdown: which approach wins?

NCT ID NCT03667196

Recruiting now Knowledge-focused Sponsor: Seung-Whan Lee, M.D., Ph.D. Source: ClinicalTrials.gov ↗

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at two methods (antegrade and retrograde) used to open completely blocked heart arteries that have been blocked for a while. Researchers will track 4,000 patients to see which approach is safer and more successful, and why some patients need one method over the other. The goal is to help doctors make better decisions for future patients.

What this could mean

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

What this could lead to: If successful, this could help doctors choose the best technique for each patient with a chronic total coronary occlusion, improving success rates and reducing complications.
What could go wrong: This is an observational study, not a randomized trial, so results may be influenced by patient selection. It does not test a new drug or device, so direct treatment breakthroughs are unlikely.

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

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for CHRONIC TOTAL OCCLUSION OF CORONARY ARTERY are added.

Our safety recommendation!

By submitting, you agree to our Terms of use

As listed by the trial registrant

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

CHRONIC TOTAL OCCLUSION OF CORONARY ARTERY

Contacts and locations

Locations

Asan Medical Center
RECRUITING

Seoul, South Korea
Busan Veterans Hospital, Korea Veterans Health Service
RECRUITING

Pusan, South Korea
Chung-Ang University Gwangmyeong Hospital
RECRUITING

Gwangmyeong, South Korea
Chungbuk National University Hospital
RECRUITING

Cheongju-si, South Korea
Chungnam National University Hospital
RECRUITING

Daejeon, South Korea
Chungnam National University Sejong Hospital
RECRUITING

Sejong, South Korea
Dong-A University Hospital
RECRUITING

Pusan, South Korea
Gangneung Asan Hospital
RECRUITING

Gangneung, South Korea
Gangwon National University Hospital
RECRUITING

Chuncheon, South Korea
Gosin University Gospel Hospital
RECRUITING

Pusan, South Korea
Gwangju Veterans Hospital, Korea Veterans Health Service
RECRUITING

Gwangju, South Korea
Gyeongsang National University Changwon Hospital
RECRUITING

Changwon, South Korea
Hallym University Sacred Heart Hospital
RECRUITING

Anyang, South Korea
Hanyang University Medical Center
RECRUITING

Guri-si, South Korea
Inha University Hospital
TERMINATED

Incheon, South Korea
Inje University Haeundae Paik Hospital
RECRUITING

Pusan, South Korea
Inje University Pusan Paik Hospital
RECRUITING

Pusan, South Korea
Kangbuk Samsung Hospital
TERMINATED

Seoul, South Korea
Keimyung University Dongsan Medical Center
RECRUITING

Daegu, South Korea
Myongji Hospital
RECRUITING

Goyang-si, South Korea
Pusan National University Yangsan Hospital
RECRUITING

Yangsan, South Korea
Samsung Medical Center
RECRUITING

Seoul, South Korea
Seoul national university Bundang hospital
RECRUITING

Gyeonggi-do, South Korea
SoonChunHyang University Hospital Bucheon
RECRUITING

Bucheon-si, South Korea
The Catholic University of Korea, Eunpyeong
RECRUITING

Seoul, South Korea
The Catholic University of Korea, Incheon ST. MARY'S Hospital
RECRUITING

Incheon, South Korea
The Catholic University of Korea, ST. Vincent's Hospital
RECRUITING

Daejeon, South Korea
The Catholic University of Seoul St. Mary's Hospital
RECRUITING

Seoul, South Korea
Ulsan University Hospital
RECRUITING

Ulsan, South Korea
Veterans Hospital Service Medical Center
RECRUITING

Seoul, South Korea
Yeungnam University Medical Center
RECRUITING

Daegu, South Korea
the Catholic University of Korea, Daejeon St. Mary'S Hospital
RECRUITING

Daejeon, South Korea

More trials for these conditions

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