Apple's ECG app that will allow serial 4-series users to take an electrocardiograph read on the move will be published as part of the watchOS 5.1
MacRumors learned about this from an internal Apple Store tutorial document.
The ECG app is exclusive to Apple Watch Series 4, which has a new electrical heart rate sensor in addition to the existing optical heart rate sensor. The user burns the software and touches the digital crown for about thirty seconds, asking for electrodes embedded in both the digital crown and back crystallized to read the heart's electrical signals.
This generates an ECG waveform again. The app indicates if your heartbeat shows signs of atrial fibrillation, which is a serious form of irregular heartbeat.
The generated ECG resembles a single-conductive electrocardiogram.
The captured Data is stored in the iPhone Health program. Apple has worked with the FDA to get clearance so that users can send their ECG reading as PDF to a doctor.
"It's an important achievement for a portable device that can provide critical data for doctors and security for you," Apple claims.
Because the app is regulated, it is only available in regions removed for use. Basically, it will be limited to the United States. Series 4 models sold worldwide also have the electrical heart rate sensor, and Apple obviously works with future expansion in Europe and elsewhere.
International users who do not have access to the app may force it to appear on the device by changing their regional settings to English (US), which also allows other limited-accessibility features, such as Apple News, Siri, and more.
watchOS 5.1.2 is currently beta-tested.