Is Our Microbiome a Predictor of Cardiac Risk

  • Study type:

    Observational What is this?

    Describes the nature of a clinical study. Types include:

    • Observational study — observes people and measures outcomes without affecting results.
    • Interventional study (clinical trial) — studies new tests, treatments, drugs, surgical procedures or devices.
    • Medical records research — uses historical information collected from medical records of large groups of people to study how diseases progress and which treatments and surgeries work best.

Study IDs

  • Site IRB:

    • Rochester, Minnesota: 13-007084
  • NCT ID:

  • Sponsor Protocol Number:


About this study

The purpose of this study is to determine a relationship between a person's flora/bacteria in their gut (the intestinal microbiome) and their risk of cardiovascular disease. Investigators will look at inflammatory markers in the blood and also look at the genome of the bacteria in the gut.

This research is being done because Investigators believe that there is a connection between the way food is digested by a person's gut bacteria and the development of atherosclerosis (hardening of the arteries) and cardiovascular disease. The ultimate goal of this research is to eventually determine if changes to the gut bacteria can prevent cardiovascular disease or disease progression.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

See eligibility criteria

Inclusion Criteria:

  1.  Anyone undergoing cardiac catheterization for suspected coronary artery disease over age 18.

Exclusion Criteria:

  1. Patients currently on long-term antibiotics who cannot stop them for at least 2 weeks prior to providing a stool sample.
  2. Patients on chronic laxatives who cannot stop for at least 2 weeks prior to stool collection.
  3. Patients who are unable to provide a stool sample to Mayo Clinic within 24 hours of collection via Fed Ex overnight mail.

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

Amir Lerman, M.D.

Open for enrollment

Rebecca Nelson