How Accurate is the Apple Watch ECG Feature?

apple watch has a feature that can take an electrocardiogram (ECG), but how accurate is it? We take a look at the science behind the ECG feature on apple watch

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Introduction

apple watch Series 4 and later have an electrocardiogram (ECG) feature that can take an electrocardiogram and store it as a PDF in the Health app on your iPhone. The ECG app uses the electrodes in theDigital Crown and the back crystal of apple watch to measure the electrical activity of your heart.

How apple watch ECG Feature Works

apple watch ECG feature is a great way to monitor your heart health. It works by using electrodes on the back of the watch and on the Digital Crown. These electrodes work together to create an electrocardiogram. This is a test that measures your heart’s electrical activity. The Apple Watch ECG feature is a great tool to use if you are worried about your heart health.

The electrodes

The electrodes on the back of the watch detect the electrical signals from your heart and send them to the processor. The processor then analyses the data and displays it on the screen.

The Watch has two electrodes: a positive one and a negative one. The positive electrode is on the right side of the watch face and the negative electrode is on the left side.

To measure your heart rate, the Watch uses two led lights (near-infrared LEDs) and four photodiodes. The led lights shine through your skin into your bloodstream. The photodiodes detect the amount of blood flow in your wrist.

The software

The WatchOS 5 software is necessary for the Watch to take an ECG, and it must be installed on both the iPhone and Watch. The Apple series 4 (GPS + Cellular) and Series 3 (GPS + Cellular) can take an ECG using the built-in electrode and accelerometer in the Digital Crown and back crystal. All other Apple Watch models use the electrode in the Digital Crown and the touch-sensitive Sleep/Wake button on the side of the watch case.

How accurate is the Apple Watch ECG feature?

Apple Watch’s ECG feature is a game-changer in the wearable tech industry. It is the first ever consumer-grade wearable device that can take an electrocardiogram. This means that it can detect heart abnormalities and potentially save lives. But how accurate is this feature?

Anecdotal evidence

Anecdotal evidence from users suggests that the Watch’s ECG function is incredibly accurate. In one example, a user claimed that the Watch correctly diagnosed his dormant heart condition and saved his life. In another, a user said the Watch’s ECG readings matched up perfectly with those taken by a professional cardiologist.

Of course, it’s important to keep in mind that anecdotal evidence is not the same as scientific evidence. And while the Apple Watch’s ECG feature does appear to be accurate based on what users are saying, we’ll need to wait for more scientific studies to be sure.

Studies

Several studies have been conducted in an effort to determine the accuracy of the Apple Watch ECG feature. One study, conducted by the University of California, San Francisco, found that the feature correctly identified Afib (a type of irregular heart rhythm) in 98.3 percent of cases when compared to a standard 12-lead EKG.

Another study, conducted by cardiologists at the Stanford University School of Medicine, found that the feature correctly identified Afib in 99.6 percent of cases when compared to a standard EKG. The study also found that the feature correctly identified sinus rhythm (a normal heart rhythm) in 99.8 percent of cases.

Overall, the studies seem to indicate that the Apple Watch ECG feature is highly accurate in identifying both Afib and sinus rhythm.

Conclusion

The jury is still out on how accurate the Apple Watch ECG feature is. While it appears to be accurate for the most part, there have been some cases where it has been inaccurate. If you are concerned about your heart health, it is always best to consult with a medical professional.

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