Hands-On: Apple Watch's New Heart Rate Features




New Apple Watch Has Heart Features, and FDA Approval

Real-time information could mean early diagnosis of heart conditions.

By Becky Upham

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The app can detect a heart beating in a normal pattern, or if the user shows signs of afib.
The app can detect a heart beating in a normal pattern, or if the user shows signs of afib.
Apple

September 17, 2019

The new Apple Watch Series 4 offers many improvements we typically expect to see in the latest technology — a larger display, longer battery life, and improved navigation. But this watch adds a little something unexpected: It could save your life or the life of someone you love. And it's backed by the Food and Drug Administration (FDA).

The new watch, which will go on sale later this month, is equipped with an electrocardiogram (ECG) monitor, and can send alerts to the wearer if it detects a heart rate that seems too low. It can also detect irregular heart rhythms and alert the user if they may have atrial fibrillation, or afib.

Ivor Benjamin, MD, president of the American Heart Association, who was present at the unveiling of the watch on September 12, 2019, commented, “I’m inspired by the lifesaving potential of technology and applaud Apple’s innovation and commitment to health. Capturing meaningful data about a person’s heart, in real time, is changing the way we practice medicine.”

The ability to access health data from an on-demand ECG that the new Apple Watch offers is game changing, said Dr. Benjamin, especially when it comes to evaluating atrial fibrillation.

The 2.7 million Americans who have afib are at increased risk for blood clots and congestive heart failure. According to the National Stroke Association, these people are 5 times more likely to have a stroke, which can happen when a blood clot leaves the heart and gets lodged in an artery in the brain.

People with afib can experience symptoms such as heart palpitations and dizziness, but some have what is known as “silent afib,” and are asymptomatic. Often people with this type of atrial fibrillation have no idea they are at risk until they discover their condition at a routine checkup or an in-office EKG.

“The Apple Watch would make diagnostics of asymptomatic arrhythmia more readily available for patients,” says Benjamin A. Steinberg, MD, a professor of medicine in the cardiovascular division of the University of Utah in Salt Lake City.The information from the watch could also help provide reassurance in the case of symptoms that are not arrhythmia, and help correlate (heart) rate symptoms with arrhythmia for others, he adds.

It’s important to note that in the clearance letter for both associated apps, the FDA specifies that the watch and the apps are “not intended to replace traditional methods of diagnosis or treatment.”

How to Use the New Features

The new Apple Watch Series 4 features a digital crown on the side of the watch. Intended primarily for user navigation, it has a titanium electrode built into the top for the ECG app. The user puts their finger on the digital crown and the watch passes a current across the chest to track electrical signals in the heart. An ECG waveform is generated in just 30 seconds.

“Historically, the watch-based heart rate monitors that rely on light transmission have not been terribly helpful clinically,” says Dr. Steinberg. “The availability of an actual electrocardiogram tracing, similar to Kardia’s AliveCor, could certainly change that.”

The resulting waveform, its classification, and any notes entered about the circumstances or other symptoms are automatically stored in the Health app on your iPhone. The user can choose to send a PDF to their doctor with the waveform and supplementary information.





Video: The Apple Watch EKG found something unexpected about my heart

New Apple Watch Has Heart Features, and FDA Approval
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Date: 10.12.2018, 00:28 / Views: 95331