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Cedars-Sinai and Smidt Heart Institute Study, Presented at European Society of Cardiology Congress 2022, Shows Artificial Intelligence Can Better Assess and Diagnose Cardiac Function

In a first-of-its-kind randomized clinical trial led by researchers at the Smidt Heart Institute and the at Cedars-Sinai, artificial intelligence (AI) proved more successful in assessing and diagnosing cardiac function when compared to echocardiogram assessments made by sonographers.

The results, announced today during a late-breaking presentation at the European Society of Cardiology Congress 2022, have immediate translational implications for patients undergoing cardiac function imaging and broader implications for the field of cardiac imaging.

“This is the first randomized clinical trial of artificial intelligence in cardiology,” said David Ouyang, MD, a cardiologist in the Department of Cardiology in the Smidt Heart Institute and principal investigator of the study, known as EchoNet-RCT. “With this new knowledge, we hope to improve the quality and effectiveness of echocardiogram imaging for patients everywhere.”

Previously, researchers at the Smidt Heart Institute and Stanford University developed one of the first artificial intelligence technologies to assess cardiac function, specifically, left ventricular ejection fraction-the key heart measurement used in diagnosing cardiac function. Their research was published in the prestigious journal Nature.  

Building on this past research, the most recent study assessed the impact of artificial intelligence in clinical deployment as part of a prospective, blinded and randomized controlled clinical trial.

There has been much excitement about the use of AI in medicine, but the technologies are rarely assessed in prospective clinical trials,” said Ouyang. “This trial was powered to show non-inferiority of the AI compared to sonographer tracings, and so we were pleasantly surprised when the results actually showed superiority for AI with respect to the pre-specified outcomes.”

In the study, Cedars-Sinai cardiologists evaluated 3,495 transthoracic echocardiogram studies, comparing initial assessment by artificial intelligence or by a sonographer-also known as an ultrasound technician.

One of the major findings was that cardiologists more frequently agreed with the AI initial assessment, such that they corrected only 16.8% of the initial assessments made by AI and simultaneously corrected 27.2% of the initial assessments made by the sonographers. This difference demonstrated not only non-inferiority but actually superiority of AI.

The research team also discovered that cardiologists were unable to distinguish between initial assessments made by the AI and sonographers.

“We asked our cardiologist over-readers to guess if they thought the tracing they had just reviewed was performed by AI or by a sonographer, and it turns out that they couldn’t tell the difference,” said Ouyang. “This speaks to the strong performance of the AI algorithm as well as the seamless integration into clinical software. We believe these are all good signs for future trial research in the field.”

Additionally, the Smidt Heart Institute research team learned that this type of clinical trial can be seamlessly integrated into the standard clinical workflow.

“We are excited by the implications of this clinical trial and what it means for the future of artificial intelligence and cardiology,” said Susan Cheng, MD, MPH, director of the Institute for Research on Healthy Aging in the Department of Cardiology at the Smidt Heart Institute and EchoNet-RCT investigator. “When developed in the right way, artificial intelligence offers the opportunity to improve the quality of echocardiogram readings as well as increase efficiencies in the time and effort spent by busy cardiologists and sonographers alike.”

As a next step, Ouyang says the Smidt Heart Institute team plans to evaluate how AI analysis applied to Cedars-Sinai echocardiogram imaging procedures may improve clinical outcomes.

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Medical Device News Magazine provides breaking medical device / biotechnology news. Our subscribers include medical specialists, device industry executives, investors, and other allied health professionals, as well as patients who are interested in researching various medical devices. We hope you find value in our easy-to-read publication and its overall objectives! Medical Device News Magazine is a division of PTM Healthcare Marketing, Inc. Pauline T. Mayer is the managing editor.

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