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Greater Burden of Atrial Fibrillation Linked to Higher Stroke Risk
Continuous heart monitoring may help physicians identify patients at higher risk and tailor treatments
(May 16, 2018)

OAKLAND, Calif., May 16, 2018 /PRNewswire/ -- Among people with intermittently recurring atrial fibrillation who are not taking anti-blood-clotting medications, those whose hearts were in abnormal rhythms longer were three times more likely to have strokes or other types of blood clots than those who had abnormal heart rhythms for less time, according to a new Kaiser Permanente study.

Kaiser Permanente Logo. (PRNewsFoto/Kaiser Permanente)

Continuous heart monitoring may help physicians identify patients at higher risk and tailor treatments, according to the study published today in JAMA Cardiology.



"In our study, in people with the greatest burden of intermittently recurring atrial fibrillation those with the greatest burden defined as more than 11 percent of the time — were the most likely to experience subsequent strokes or arterial blood clots, even after we controlled for all other important risk factors," said lead author Alan S. Go, MD, director of the Comprehensive Clinical Research Unit within the Kaiser Permanente Division of Research.

Both types of atrial fibrillation — intermittently recurring and that which occurs 100 percent of the time — can produce irregular and fast heartbeats, or arrhythmias. They affect millions of adults in the United States, and are linked to a higher risk of ischemic strokes and other types of blood clots. Currently, patients with any amount of atrial fibrillation are treated the same as those with chronic atrial fibrillation when it comes to stroke prevention, but whether these groups have an equal risk of strokes and blood clots has been controversial, explained Dr. Go.

The Kaiser Permanente Real-World Heart Monitoring Strategy Evaluation, Treatment Patterns, and Health Metrics in Atrial Fibrillation (known as KP-RHYTHM) study used a non-invasive, continuous electrocardiographic device to gather data on the amount of time people spent in the arrhythmias. Approved by the Food and Drug Administration, the monitoring device is a lightweight patch that adheres to the upper left chest, recording and storing beat-to-beat information for up to two weeks.

The study analyzed heart rhythm data for 1,965 adult members of Kaiser Permanente living in California with confirmed intermittently recurring atrial fibrillation and is among the largest to employ continuous, non-invasive heart monitoring. Participants wore the monitoring device continuously for up to 14 days between October 2011 and October 2016 and were not taking anti-blood clotting medications during that time.

Study participants were followed through November 2016 to identify those hospitalized for ischemic stroke or arterial blood clots (thromboembolism) while not taking anti-blood-clotting (anti-coagulation) medications such as warfarin or direct oral anticoagulants.

"This study has the potential to have a major impact on heart care," said senior author Matthew D. Solomon, MD, PhD, a cardiologist at Kaiser Permanente in Oakland, California, and adjunct researcher at the Division of Research. "Using new continuous heart-monitoring technology, physicians can identify patients with intermittently recurring atrial fibrillation at greater risk and engage in better-informed shared decision-making around stroke prevention strategies."

This study was supported by a research grant from iRhythm Technologies, Inc.

In addition to Drs. Go and Solomon, co-authors were: Kristi Reynolds, PhD, MPH, and Teresa N. Harrison, SM, Department of Research and Evaluation, Kaiser Permanente Southern California; Jingrong Yang, MA, and Sue Hee Sung, MPH, Division of Research, Kaiser Permanente Northern California; Nigel Gupta, MD, Kaiser Permanente Los Angeles Medical Center; Judy Lenane, RN, MHA, iRhythm Technologies; and Taylor I. Liu, MD, PhD, Kaiser Permanente Santa Clara Medical Center.

About the Kaiser Permanente Division of Research
The Kaiser Permanente Division of Research conducts, publishes and disseminates epidemiologic and health services research to improve the health and medical care of Kaiser Permanente members and society at large. It seeks to understand the determinants of illness and well-being, and to improve the quality and cost-effectiveness of health care. Currently, DOR's 550-plus staff is working on more than 350 epidemiological and health services research projects. For more information, visit divisionofresearch.kaiserpermanente.org or follow us @KPDOR.

About Kaiser Permanente
Kaiser Permanente is committed to helping shape the future of health care. We are recognized as one of America's leading health care providers and not-for-profit health plans. Founded in 1945, Kaiser Permanente has a mission is to provide high-quality, affordable health care services and to improve the health of our members and the communities we serve. We currently serve more than 12 million members in eight states and the District of Columbia. Care for members and patients is focused on their total health and guided by their personal Permanente Medical Group physicians, specialists and team of caregivers. Our expert and caring medical teams are empowered and supported by industry-leading technology advances and tools for health promotion, disease prevention, state-of-the-art care delivery and world-class chronic disease management. Kaiser Permanente is dedicated to care innovations, clinical research, health education and the support of community health. For more information, go to share.kaiserpermanente.org.

For more information, contact:
Janet Byron, [email protected], 510-891-3115
Heather Platisha, [email protected], 415-262-5992 

 

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SOURCE Kaiser Permanente

Copyright 2014 PR Newswire. All Rights Reserved


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