Medtronic launches app-based study to probe relationship between AF disease burden and patient outcomes

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Medtronic’s Reveal LINQ implantable cardiac monitor

Medtronic has announced the initiation of DEFINE AFib, an app-based research study which aims to address unanswered questions around atrial fibrillation (AF) burden and its impact on patient outcomes, quality of life, and healthcare utilisation. The study will use data collected from the LINQ family of insertable cardiac monitors (ICMs).

The first patients in the study were enrolled at Duke University Medical Center in Durham, USA, by Jonathan Paul Piccini, director of Cardiac Electrophysiology and associate professor of medicine, and at Florida Electrophysiology Associates in Atlantis, USA, by Robert S. Fishel, founder of the practice and director of Electrophysiology at JFK Medical Center.

DEFINE AFib will be conducted remotely through the Medtronic Discovery App in coordination with US sites that collectively will enrol approximately 5,000 patients. Study participants will include patients age 22 or older who have a history of AF, an iPhone device (iOS version 13 or higher), and one of the LINQ family of ICMs, among other criteria. The study will incorporate both device data and patient-reported data derived from scheduled patient surveys and the HealthKit—coupled with electronic health record information about medications and previous cardiac procedures—to provide comprehensive, actionable insights. Through a machine learning approach, aggregated study data will be leveraged to enable improved AF management in the future.

“When it comes to managing atrial fibrillation, there is not a ‘one-size-fits-all’ approach, and the hope is that DEFINE AFib may give us the tools to help personalize AF management based on a patient’s individual health profile and physiology,” said Piccini, who is also chair of the DEFINE AFib Steering Committee. “DEFINE AFib will harness the power of digital health to make fundamental discoveries about how we can manage atrial fibrillation better in each and every one of our patients.”

Medtronic developed the app using the ResearchKit framework, given Apple’s commitment to privacy and user-friendly experience. The app design leveraged insights from more than 100 hours of patient interviews to simplify and customize patient enrollment, data collection, and communication processes. Extensive app functionality will allow researchers to conduct DEFINE AFib and future large, integrated Medtronic studies remotely, with less site implementation burden.

“Traditional, in-person clinical studies are critically important to deepen our understanding of how to manage chronic conditions like AF but can place a lot of demands on the patients and physicians involved,” said Julie Brewer, president of the Cardiovascular Diagnostics and Services business, which is part of the Cardiovascular Portfolio at Medtronic. “A fully app-based study design, with sophisticated data aggregation capabilities and remote monitoring using the LINQ family of ICMs, enables us to conduct DEFINE AFib without in-person patient enrollment or follow-up. This first-of-its-kind trial paves the way for future app-based studies at Medtronic.”


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