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Investigation of a Novel Gene Expression Test for Diagnosis of Obstructive Coronary Artery Disease

This study has been completed.
Information provided by (Responsible Party):
CardioDx Identifier:
First received: March 16, 2012
Last updated: November 25, 2014
Last verified: November 2014
The objective of this study is to collect data on the commercial use of CORUS® (validated quantitative in vitro diagnostic test) Coronary Artery Disease (CAD) blood test to evaluate the clinical referral patterns of Primary Care Physicians after receipt of their patients' CORUS Score, and to better understand patient management patterns for clinicians ordering the test.

Coronary Artery Disease

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Coronary Obstruction Detection by Molecular Personalized Gene Expression

Resource links provided by NLM:

Further study details as provided by CardioDx:

Primary Outcome Measures:
  • Rate of referral vs. Corus score as continuous variables [ Time Frame: 30 Days ]
    Composite endpoint consisting of referrals to a cardiologist, to cardiac stress/CTA and/or to invasive cardiac catheterization occurring between Day 0 and Day 30 + 15 days.

Secondary Outcome Measures:
  • Rate of referral difference between low Corus (</=15) and non-low Corus (>15) scores. [ Time Frame: 30 Day ]
    composite endpoint consisting of referrals to a cardiologist, to cardiac stress/CTA, and/or referral to invasive cardiac catheterization at Day 30 +15 days.

Enrollment: 342
Study Start Date: April 2012
Study Completion Date: May 2013
Primary Completion Date: March 2013 (Final data collection date for primary outcome measure)
Detailed Description:

Objective of the study is to assess whether the score provided by the CORUS® CAD test has an effect on the Primary Care Physician's patient management and referral patterns once received:

  1. no further cardiac testing or treatment
  2. medical therapy for angina or non-cardiac chest pain
  3. Referral to a cardiologist for stress testing with or without imaging, CT angiography, or invasive cardiac catheterization.

Since it takes approximately two days for the physician to receive the result of the CORUS CAD, initial diagnostic testing will reflect local standard of care


Ages Eligible for Study:   21 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Subjects will be enrolled at multiple qualified participating study centers that have incorporated CORUS CAD for the diagnosis of obstructive CAD into their routine practice.

Inclusion Criteria:

  1. Patients with symptoms suggestive of CAD, including typical or atypical angina or angina equivalent
  2. The patient has signed the appropriate Institutional Review Board approved Informed Consent Form

Exclusion Criteria:

  1. History of myocardial infarction
  2. Current MI or acute coronary syndrome
  3. Current New York Heart Association (NYHA) class III or IV congestive heart failure symptoms
  4. Any previous coronary Revascularization
  5. Any individuals with:

    • Diabetes
    • Suspected unstable angina
    • Systemic infections
    • Systemic inflammatory conditions
  6. Any individuals currently taking:

    • Steroids
    • Immunosuppressive agents
    • Chemotherapeutic agents
  7. Recipient of any organ transplant
  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: NCT01557855

United States, Arizona
Arizona Sun Family Medicine
Gilbert, Arizona, United States, 85296
Fiel Family Medicine
Tempe, Arizona, United States, 85283
United States, Georgia
Town Lake Internal Medicine
Woodstock, Georgia, United States, 30189
United States, Louisiana
Maringouin Medical Center
Maringouin, Louisiana, United States, 70757
The Bonin Clinic
Zachary, Louisiana, United States, 70791
United States, North Carolina
Triangle Primary Care
Wake Forest, North Carolina, United States, 27587
United States, Ohio
Comprehensive Physicians Associates
Youngstown, Ohio, United States, 44505
Sponsors and Collaborators
Study Director: Michael Zapien, MS CardioDx
  More Information