The GIRAFFE Study: Genomic Risk Markers for Atrial Fibrillation Following Extended Cardiac Rhythm Monitoring

Trial ID:
Eric Topol
Our primary hypothesis is that a risk score comprised of approximately 10 single nucleotide polymorphisms (SNPs) that are associated with atrial...

Inclusion Criteria:

  • Symptoms of high clinical suspicion for atrial fibrillation prompting referral for ambulatory cardiac rhythm monitoring for potential atrial fibrillation.


  • At high risk for atrial fibrillation, defined as any one of the following: ischemic stroke with no defined etiology (In prior 6 months) [3, 4, 6, 7], hypertension [33], increased body mass index (BMI >30kg/m2) [33], heart failure [33], clinically significant murmur [33], prolonged PR interval on resting ECG [33], chronic kidney disease [34], hypertrophic cardiomyopathy [35], congenital heart disease [36], chronic obstructive pulmonary disease [37, 38], sleep apnea [39-41], thyroid disease [42, 43], family history of atrial fibrillation [44], diabetes [45] or excess alcohol consumption (Male > 14 drinks/week, Female >7 drinks/week)[46].
  • Age 40 years or older
  • Capable of providing informed consent
  • Capable of wearing a Zio Patch for up to 14 days
  • Capable of providing a blood sample

Exclusion Criteria:

  • Previously documented atrial fibrillation or atrial flutter.
  • Prior cardiac surgery (coronary artery bypass grafting, valve replacement or repair, pericardial stripping, etc) within the past 30 days.
  • Hyperthyroidism.
  • Have known skin allergies, conditions, or sensitivities (e.g. allergy to adhesives, psoriasis) as the Zio Patch should not be used on patients with known skin allergies, conditions, or sensitivities.
  • Are receiving pacing therapy.
  • Are anticipated to receive or require external cardiac defibrillation during the monitoring period.
  • Are anticipated to have exposure to high frequency surgical equipment during the monitoring period.

Why isn't this trial accepting new patients?

The trial may have a limited enrollment number, reached its maximum, or come to the end of its enrollment period. View trials that are recruiting

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