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Common Smartwatches can Now Detect Irregular Heartbeats

by Preethi Sivaswaamy Mohana on March 22, 2018 at 12:12 PM
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Common Smartwatches can Now Detect Irregular Heartbeats

Irregular heartbeat, or atrial fibrillation (AF) can be detected with a smartwatch coupled with a machine learning algorithm, finds a new study. The findings of the study are published in the journal JAMA Cardiology .

Bottom Line: The smartwatch showed high accuracy in a small group of patients undergoing treatment to restore normal heart rhythm but with lower accuracy in a larger group of people with a self-reported history of AF.

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Why The Research Is Interesting: Atrial fibrillation affects 34 million people worldwide and is a leading cause of stroke. AF often has no symptoms and it can go undetected until a stroke happens. There is interest in readily accessible ways to monitor for AF.

Who and When: 9,750 participants with an Apple Watch enrolled in the Health eHeart Study, including 347 with self-reported AF, and another group of 51 patients undergoing cardioversion, a treatment using medication or electricity, to restore regular heart rhythm from 2016 to March 2017; participants wore smartwatches to collect heart rate and step count data as part of the development and training of a deep neural network, which is a type of machine learning algorithm, to detect AF.
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What (Study Measures): Validation of the neural network to detect AF with 51 patients undergoing cardioversion compared against the standard of 12-lead electrocardiography (ECG); and a second exploratory analysis using smartwatch data from 1,617 ambulatory individuals to classify those with AF compared against self-reported AF.

How (Study Design): This was an observational study. Scientists were not intervening for purposes of the study and cannot control all the natural differences that could explain the study findings.

Authors: Gregory M. Marcus, M.D., M.A.S., University of California, San Francisco, and co-authors.

Study Limitation: All participants already owned a smartwatch or, among the patients undergoing cardioversion, had a coordinator provide assistance; therefore, it is possible these results would not generalize to less tech-savvy individuals.

Study Conclusions: These data support further research regarding the use of commercially available smartwatches coupled with a deep neural network for the purpose of detecting AF.



Source: Eurekalert
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