Clinical trial NCT01742507: A Study Comparing Two Stent on the Degree of Early Stent Healing and Late Lumen Loss.The OCT-ORION Study
Official title: A Randomized Optical Coherence Tomography Study Comparing Resolute Integrity to Biomatrix Drug-eluting Stent on the Degree of Early Stent Healing and Late Lumen Loss.The OCT-ORION Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE4
Conditions: Coronary Artery Disease
Keywords: Stent, OCT
Lead sponsor: The University of Hong Kong
Sponsor class: OTHER
First posted: 2012-12-05
Enrollment: 60
Sex: ALL
Minimum age (years): 18
Maximum age (years): 85
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: Stent coverage and neo-intimal growth can be evaluated in-detail by intracoronary optical coherence tomography (OCT), which is a catheter-based imaging technique. It is performed as part of the PCI procedure. OCT is the optical analogue of intravascular ultrasound (IVUS), except that it can provide much higher resolution of coronary cross sectional images than IVUS. The LightLab C7XR OCT system (Frequency Domain OCT) used in this Hospital has obtained full CE Mark, approved by the US FDA, and approved for clinical use in Hong Kong. It has been shown to be safe in clinical settings and has been used in over 300 patients without complication at Queen Mary Hospital.

In this study, stent coverage and neo-intimal growth between zotarolimus-eluting stents (ZES) and biolimus-eluting stents (BES) will be compared by using OCT at 9 month and specific post-intervention re-study intervals.

The investigators objective is to investigate the clinical impact and OCT difference on early stent healing and late lumen loss between the two new-generation limus-eluting-stents - Resolute Integrity and Biomatrix, which differ in stent design, eluting drug and coating polymer.

Detailed description: This is a prospective, randomised, assessor-blinded, single centre study. Patients with symptomatic coronary artery diseases in 2 or 3 coronary vessels requiring PCI are eligible for the study. PCI will be performed in the usual manner to all the study lesions in the same procedure. In a randomized fashion, each patient will have one artery with critical disease(s) treated by the Resolute Integrity Stent(s) and the other artery treated by the Biomatrix Stent(s).

Baseline OCT data will be obtained right after stenting. The remaining coronary artery, if diseased and required PCI treatment, will be treated during the angiographic and OCT follow-up as a staged procedure. Patients will be randomly assigned into 5 groups with equal number, receiving a follow-up coronary angiogram with OCT from 2, 3, 4, 5 and 6 months interval post-intervention. Each patient will serve as his/her own control comparing the 2 types of stents. At 9-month post-intervention, all patients will receive a second follow-up coronary angiogram with OCT. All OCT data analyses will be performed in a blinded fashion by a core laboratory. Phone follow up will be carried out for cardiac events at 1 year and 2 year of post intervention.

Eligibility criteria: Inclusion Criteria:

* Patient aged 18-85 years old
* Patient with symptomatic coronary artery diseases involving two or more vessels requiring percutaneous coronary intervention

Exclusion Criteria:

* Patient who is unable to give consent
* Patient in acute myocardial infarction or unstable angina
* Patient who is hemodynamically unstable
* Patient who is allergic to contrast agents
* Patient who is allergic to anti-platelet agents
* Patient who is allergic to zotarolimus
* Patient who is allergic to biolimus
* Patient who is pregnant
* Patient who has planned surgery in the following 12 months after percutaneous coronary intervention
* Left main coronary lesion
* Bifurcation lesion
* Chronic total occlusion lesion
* Coronary vessel size smaller than 2.5mm
* Coronary lesion longer than 38mm in length

Primary outcomes:
measure: • OCT derived percentage stent strut coverage at 9 month
timeFrame: 9 month
Secondary outcomes:
measure: Angiographic binary stenosis
timeFrame: 9 month
measure: • OCT derived neo-intimal area at 9 month
timeFrame: at 9 month
measure: • Minimal lumen diameter by Quantitative Coronary Analysis (QCA) at 9 month
timeFrame: 9 month
measure: • All major adverse cardiac events (all cardiac deaths, myocardial infarction, target vessel failure and target lesion revascularization, and stent thrombosis) at the pre-defined 2 to 9 months angiographic and OCT follow-up.
timeFrame: 2 to 9 months
measure: • Target vessel stent thrombosis per Academic Research Consortium (ARC) definition
timeFrame: from enrollment till 2 years follow up
measure: Percentage of stent strut malapposition
timeFrame: 9 month
measure: Mean neo-intimal thickness (NIT) at 9 month
timeFrame: 9 month
measure: Stent volume
timeFrame: at 9 month
measure: Lumen volume
timeFrame: at 9 month
measure: Neointimal Hyperplasia (NIH) volume
timeFrame: at 9 month
Other outcomes:
Locations:
city: Hong Kong
country: Hong Kong
facility: Division of Cardiology, Department of Medicine, QMH
Study officials:
affiliation: Queen Mary Hosptial, The Univeristy of Hong Kong
name: Stephen Wai Luen LEE, MD FRCP FACC
role: PRINCIPAL_INVESTIGATOR
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