PREcise Percutaneous Coronary Intervention for Stent OptimizatION in Treatment of COMPLEX Lesion (PRECISION-COMPLEX)

Last updated: April 18, 2025
Sponsor: Chonnam National University Hospital
Overall Status: Active - Not Recruiting

Phase

N/A

Condition

Coronary Artery Disease

Cardiac Ischemia

Cardiac Disease

Treatment

Angiography-guided PCI

OCT-guided PCI

Drug-eluting stent

Clinical Study ID

NCT05493904
CNUH-2022-283
  • Ages > 18
  • All Genders

Study Summary

The aim of the study is to compare post-interventional fractional flow reserve (FFR) value between optical coherence tomography(OCT)-guided and angiography-guided strategy for treatment of complex coronary lesion.

Eligibility Criteria

Inclusion

Inclusion Criteria:

  1. Patients >18 years old

  2. Patients with stable or unstable angina and complex coronary lesions*

  3. Patients who were indicated revascularization

  • Diameter stenosis >90% by angiography

  • Diameter stenosis with 50~90% with pre-interventional FFR ≤0.80

  1. Patients who underwent implantation of 2nd generation drug-eluting stent
  • Definitions of complex coronary lesions
  1. True bifurcation lesion (Medina 1,1,1/1,0,1/0,1,1) with side branch ≥2.5mmsize
  2. Chronic total occlusion (≥3 months) as target lesion
  3. PCI for unprotected left main (LM) disease (LM os, body, distal LMbifurcation including non-true bifurcation)
  4. Long coronary lesions (implanted stent ≥38 mm in length)
  5. Multi-vessel PCI (≥2 major epicardial coronary arteries treated at one PCIsession)
  6. Multiple stents needed (≥3 more stent per patient)
  7. In-stent restenosis lesion as target lesion
  8. Severely calcified lesion (encircling calcium in angiography)
  9. Left anterior descending (LAD), left circumflex artery (LCX), and rightcoronary artery (RCA) ostial lesion

Exclusion

Exclusion Criteria:

  1. Target lesions not amenable for PCI by operators' decision

  2. Cardiogenic shock (Killip class IV) at presentation

  3. Less than TIMI 3 flow of target vessel after index procedure

  4. Intolerance to Aspirin, Clopidogrel, Prasugrel, Ticagrelor, Heparin, Everolimus,Zotarolimus, Biolimus, or Sirolimus

  5. Known true anaphylaxis to contrast medium (not allergic reaction but anaphylacticshock)

  6. Renal insufficiency such that an additional contrast medium would be harmful forpatient

  7. Recent ST-segment elevation myocardial infarction (STEMI)

  8. Inability to receive adenosine or nicorandil injection

  9. Pregnancy or breast feeding

  10. Non-cardiac co-morbid conditions are present with life expectancy <2 year or thatmay result in protocol non-compliance (per site investigator's medical judgment)

  11. Unwillingness or inability to comply with the procedures described in this protocol

Study Design

Total Participants: 320
Treatment Group(s): 3
Primary Treatment: Angiography-guided PCI
Phase:
Study Start date:
November 01, 2022
Estimated Completion Date:
December 31, 2027

Study Description

There has been ample evidence of the role of intracoronary imaging for optimizing the stent, especially among the patients with complex coronary lesions. Intracoronary imaging can be used during the entire process of percutaneous coronary intervention (PCI), from pre-PCI to post-PCI stages. Notably, approximately 15-20% of patients who underwent angiographically successful PCI showed significant stent underexpansion, malapposition, intra-stent thrombus formation, and edge dissection on intracoronary imaging studies, including optical coherence tomography (OCT).

Meanwhile, the role of pre-interventional fractional flow reserve (FFR) measurement has been well established and recommended by recent guideline. However, although previous studies evaluated the efficacy and safety of FFR-guided decision-making followed by angiographic stent implantation, they did not evaluate functionally optimized revascularization. Actually, the vessels with low post-PCI FFR had substantial proportions of suboptimized stented (underexpansion and acute malapposition) and residual disease in non-stented segments. Furthermore, several large observational studies have suggested that suboptimal physiologic results after PCI is associated with an increased risk of clinical events. Previously, the DOCTORS trial found out that OCT-guided PCI was associated with higher post-PCI FFR than angiography-guided PCI (0.94±0.04 vs. 0.92±0.05, P=0.005).

Therefore, OCT can be a useful tool for acquiring functional optimal results after stent implantation. This synergic effect between OCT and post-PCI FFR can be maximized when the investigators perform PCI for complex lesions. This study sought to evaluate compare post-interventional FFR value between OCT-guided and angiography-guided strategy for treatment of complex coronary lesion.

Connect with a study center

  • Keimyung University Dongsan Hospital

    Daegu,
    Korea, Republic of

    Site Not Available

  • Chonnam National University Hospital

    Gwangju, 61469
    Korea, Republic of

    Site Not Available

  • Chung-Ang University Gwangmyeong Hospital

    Gwangmyeong,
    Korea, Republic of

    Site Not Available

  • Jeju National University Hospital

    Jeju,
    Korea, Republic of

    Site Not Available

  • Samsung Medical Center

    Seoul,
    Korea, Republic of

    Site Not Available

  • Seoul National University Hospital

    Seoul,
    Korea, Republic of

    Site Not Available

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