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Screening for Atrial Fibrillation in Native AmeRicans Using iPhone ECG (SAFARI)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03740477
Recruitment Status : Suspended (Due to COVID-19)
First Posted : November 14, 2018
Last Update Posted : April 9, 2020
Information provided by (Responsible Party):
University of Oklahoma

Brief Summary:
Atrial fibrillation (AF) is the most common clinically significant arrhythmia and is associated with increased rates of stroke, heart failure, mortality, hospitalization, and cognitive decline. Approximately one third of ischemic strokes are attributable to either previously known or newly detected AF at the time of stroke. Many AF episodes are asymptomatic and stroke is the first manifestation of AF in at least 25% of AF-related strokes. Anticoagulation for AF leads to a reduction in stroke to levels similar to matched individuals without AF. Therefore, identifying AF in an earlier asymptomatic state (i.e. screening for silent AF), with subsequent initiation of anticoagulation in at-risk individuals, may decrease the risk of future thromboembolic events. The availability of inexpensive smartphone-based or handheld ECG devices that rapidly acquire a cardiac rhythm strip of quality comparable to a traditional 12-lead ECG have markedly enhanced the feasibility of AF screening. Native Americans have a high prevalence of diabetes and higher incidence of stroke than whites and blacks. Our central hypothesis is that screening for AF using a single time point, 30-second iPhone-based ECG recording over 2 weeks will result in identification of silent AF in a significant number of individuals at risk for stroke compared to routine care (no screening) and will thus lead to improved outcomes through initiation of anticoagulation. The aim of this study is to screen for AF in Native Americans who are seen at the Absentee Shawnee Tribal clinic using a smartphone-based ECG device. Individuals who are at least 50 years old and have no prior history of AF will be eligible for enrollment in the study. Eligible participants will receive a 30-second ECG recording during their visit at the Absentee Shawnee Tribal clinic. The device has an algorithm for diagnosis of AF, which is 98% sensitive and 97% specific. A cardiologist will overread the tracings that are diagnosed by AF by the device. Those confirmed to have AF will be referred to a cardiologist for further evaluation and management. The clinical characteristics of those who are found to have AF will be compared with those who are not, in order to identify risk factors for AF. Newly diagnosed AF using this method is expected to be approximately 2.5%. We aim to include a total of 1,500 participants over 12 months. The proposed study will provide the basis for the design of further intervention studies using mobile technology to improve the health of Native Americans and other minority populations. In light of the high prevalence of risk factors for AF in Native Americans and the association of silent AF with stroke, this novel approach for AF screening has the potential to impact clinical practice and improve health outcomes among a large number of individuals.

Condition or disease Intervention/treatment Phase
Atrial Fibrillation Diagnostic Test: ECG Not Applicable

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 1500 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: Screening for Atrial Fibrillation in Native AmeRicans Using iPhone ECG (SAFARI)
Actual Study Start Date : December 3, 2018
Estimated Primary Completion Date : April 30, 2020
Estimated Study Completion Date : October 31, 2020

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Intrevention
Eligible participants will receive a 30-second smartphone-based ECG
Diagnostic Test: ECG
Eligible participants will receive a 30-second ECG recording during their visit at the Absentee Shawnee Tribal clinic

Primary Outcome Measures :
  1. incidence of newly diagnosed atrial fibrillation [ Time Frame: 12 months ]

Secondary Outcome Measures :
  1. prevalence of guideline-directed anticoagulant use among participants who are found to have atrial fibrillation [ Time Frame: 12 months ]

Information from the National Library of Medicine

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, Learn About Clinical Studies.

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Ages Eligible for Study:   50 Years to 100 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male or female aged 50 or older

Exclusion Criteria:

  • Known history of atrial fibrillation

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03740477

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United States, Oklahoma
University of Oklahoma Health Sciences Center
Oklahoma City, Oklahoma, United States, 73104
Sponsors and Collaborators
University of Oklahoma
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Responsible Party: University of Oklahoma Identifier: NCT03740477    
Other Study ID Numbers: 9501
First Posted: November 14, 2018    Key Record Dates
Last Update Posted: April 9, 2020
Last Verified: April 2020
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Atrial Fibrillation
Arrhythmias, Cardiac
Heart Diseases
Cardiovascular Diseases
Pathologic Processes