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Optimal Physiologic Intravascular Ultrasound Imaging Criteria After Drug Eluting Stent Implantation

This study is currently recruiting participants. (see Contacts and Locations)
Verified May 2014 by Inje University
Seoul National University Hospital
Information provided by (Responsible Party):
Joon Hyung Doh, Inje University Identifier:
First received: August 12, 2012
Last updated: May 12, 2014
Last verified: May 2014

Invasive imaging criteria of the Coronary arteriography (CAG) and intravascular ultrasound imaging (IVUS), satisfying procedural optimization after drug eluting stent (DES) implantation, were used in < 10% DS by CAG and 5-5.5mm2 MSA by IVUS. Whether these criteria satisfy not only relieving visible stenosis but also relieving lesion specific ischemia or not were unclear. Fractional flow reserve (FFR), an index of lesion specific ischemia, was proposed 0.9 as a physiologic criteria satisfying successful stent implantation by previous studies with bare metal stent. FFR after drug-eluting stent implantation can be an useful predictor for clinical outcome. But, direct comparative evaluation of the invasive imaging criteria defining as an indicator relieving myocardial ischemia were not reported. The aim of this study was to investigate angiographic and IVUS parameters in which corresponding FFR and evaluate their optimal physiologic criteria after DES implantation.

Coronary Disease

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Cross-Sectional
Official Title: Angiographic and IVUS Criteria Defining Physiologic Optimization By the Fractional Flow Reserve After DES Implantation

Further study details as provided by Inje University:

Primary Outcome Measures:
  • Differences angiographic and IVUS parameters after DES between different FFR groups [ Time Frame: baseline ] [ Designated as safety issue: No ]
    Angiographic residual percent diameter stenosis (%), minimal stent lumen diameter (mm) and total stent length (mm), and IVUS minimal stent cross-sectional area (mm2) and minimal stent lumen diameter (mm) will be compared according to different FFR groups at the time of measurement after DES implantation.

Estimated Enrollment: 200
Study Start Date: March 2010
Estimated Study Completion Date: December 2014
Primary Completion Date: December 2013 (Final data collection date for primary outcome measure)
low post DES FFR group (<0.9)
the patient with FFR values less than 0.9 after DES procedure
high post DES FFR group (≥0.9)
the patient with FFR values greater than 0.9 after DES procedure


Ages Eligible for Study:   20 Years to 85 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population

Patients who underwent coronary angiography and percutaneous coronary intervention for the diagnosis and treatment purposes because of clinical angina pectoris. Patient who underwent simultaneous IVUS and FFR measurement after DES implantation would be enrolled consecutively.


Inclusion Criteria:

  • clinical angina pectoris who underwent IVUS and FFR during coronary angiography and after DES implantation.
  • agree with informed consent
  • At least one segment of three major epicardial coronary arteries were consecutively enrolled in invasive CAG.
  • Post- stent FFR and IVUS measurement performed at the immediately after whole PCI procedures.

Exclusion Criteria:

  • unable to get informed consent
  • low left ventricular ejection fraction less than 35%
  • chronic renal failure (Cr > 2.0mg/dl)
  • acute myocardial infarction related coronary artery
  • allergy to adenosine injection
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01667757

Contact: Joon Hyung Doh, MDPhD 82-31-910-7830

Korea, Republic of
Inje University Ilsan Paik Hospital Recruiting
Goyang, Gyeonggido, Korea, Republic of, 411-709
Contact: Joon Hyung Doh, MDPhD    82-31-910-7830   
Contact: Bon-Kwon Koo, MDPhD   
Principal Investigator: Joon Hyung Doh, MDPhD         
Sponsors and Collaborators
Inje University
Seoul National University Hospital
Principal Investigator: Joon Hyung Doh, MDPhD Inje University
  More Information

Responsible Party: Joon Hyung Doh, MD, PHD, Inje University Identifier: NCT01667757     History of Changes
Other Study ID Numbers: IB-2-1208-026
Study First Received: August 12, 2012
Last Updated: May 12, 2014
Health Authority: Korea: Institutional Review Board

Keywords provided by Inje University:
coronary atherosclerosis
drug eluting stent
intravascular ultrasound
fractional flow reserve processed this record on March 03, 2015