EKG-Reading Kardia Band Is First Apple Watch Accessory To Get FDA Clea

AliveCor, the digital health company founded by ex-Googler Vic Gundotra, says the Food and Drug Administration has approved its EKG band accessory for the Apple Watch. Gundotra says the Kardia Band, as the product is called, is the first Apple Watch health accessory to get FDA clearance.

Kardia Band attaches to the Apple Watch like any other replaceable watch band. The user rests a finger on the sensor pad embedded in the band, allowing an EKG reading to be taken. (Electrocardiograms detect irregularities in the electrical impulses that trigger the contractions in the four chambers of the heart.) The Kardia Band transmits its EKG reading to the Apple Watch (via a high-pitch audio signal) where it’s displayed in real time as a moving waveform. When the 30-second EKG is finished, the user can view it on their phone or easily send the results as a PDF to their physician.

Doctors can diagnose hundreds of diseases using EKG data, but AliveCor is cleared by the FDA only to record the EKG and to advise a user that the reading is normal, or possibly indicative of atrial fibrillation. Atrial fibrillation is is the most common heart arrhythmia, and a leading cause of stroke. It affects more than 30 million people worldwide, and one in four people over the age of 40 are at risk for developing it.

Gundotra says the Kardia Band will be useful to younger people who have diagnosed heart conditions, and by people in their 40s or older who have congenital heart disease in their families.

A first version of the Kardia Band was released in Europe last year, but AliveCor was still wading through an intense approval process with the FDA in the U.S. The product the FDA approved is quite different than the first version of the Kardia Band released in Europe, Gundotra points out. The real-time EKG waveforms are new–made possible by a change in the Watch Apple made at the request of AliveCor.

Then there’s the AI. The new version includes something called SmartRhythm, a set of machine learning algorithms that run on the Apple Watch and use real-time and historical activity and sensor data to predict an acceptable heart rate range for the user throughout the day. If the user’s heart rate goes outside that range a number of times or for long periods of time, the AliveCor app running on the watch suggests that the user take an EKG reading.

That prompting function is important to doctors taking care of heart patients at risk of atrial fibrillation, Scripps cardiologist Dr. Eric Topol told me. 

“A lot of my patients already use the credit card sensor (AliveCor’s earlier smartphone-connected Kardia Mobile EKG reader), but they don’t know when to take an EKG; so they just do it when they feel light-headed or dizzy,” says Topol, who helped test the Kardia Band. The problem is, atrial fibrillation can happen with no physical symptoms at all. So the Kardia app looks at the Apple Watch’s heart rate data for clues that atrial fibrillation could be occurring. If it finds them it advises the user to do an EKG. 

“If you can direct them when to do the EKG it’s going to markedly increase the number of EKGs taken.” That gives the cardiologist more diagnostic data to work with, but it also feeds more training data to AliveCor’s AI, making it better and better about reading the clues in the heart rate data. 

I think we’ll learn much when [Kardia Band] gets out there in big numbers,” Topol said. 

Gundotra said it took time for him and his company to learn how to work with the FDA. Seeking approval for a digital health product is an expensive and time-consuming process that often seems foreign and off-putting to Silicon Valley companies. Gundotra, an ex-Google executive who oversaw the development of Google Photos and Google+, says it took some time for he and his team to adapt to the agency’s methodical, evidence-based way of doing things.

Gundotra readily admits that working in the health world has required him to “start over” in some ways. He already made his fortune in tech and has found his Second Act building affordable consumer devices that promote health and even save lives. He’s surrounded himself with several other ex-Google people at AliveCor who are in the same general place, meaning that making money isn’t the only thing driving their commitment. “They’re working for the mission, the AliveCor mission,” Gundotra said.

It’s a worthy mission. Atrial fibrillation is a killer. Just look at the numbers. Cardiac disease kills more people each year than all types of cancer combined, and atrial fibrillation accounts for 20% of deaths. The kicker is that people who have atrial fibrillation live with it for an average of 1.7 years before it is actually diagnosed, and the diagnosis often occurs after something terrible has happened, like a stroke. That’s where AliveCor could really help–an early warning could truly save lives.

Kardia Band is available at AliveCor.com and on Amazon starting today for $199. It requires subscription to AliveCor’s premium service for $99 a year.