Apple Watch was the first to use the electrocardiogram function, and in fact, paved the way for thinking of the smartwatch as a device that could be useful!
Fitbit, too, has rolled out the feature on its new Fitbit Sense smartwatch. After announcing the presence of special sensors on the new model, the US company has received clearance from the US Food and Drug Administration (FDA), and from the European Compliance (CE), for its application for electrocardiogram, capable of measuring heart rate and detecting potential signs of atrial fibrillation (AFib). The latter is a disease that affects over 33.5 million people worldwide and detecting the signs as soon as possible can be of great help. Some studies suggest, in fact, that up to 25% of people who have a stroke only later discover that the latter was related to atrial fibrillation.
As part of the process of gaining approval from regulatory agencies, Fitbit
conducted a study in multiple regions of the United States that demonstrated the algorithm’s ability to detect atrial fibrillation with very high accuracy from a normal sinus and heart rhythm. generate an ECG trace or electrical rhythm recording of the heart, which is qualitatively similar to an ECG.
The study demonstrated that the algorithm exceeded target performance with an ability to detect 98.7% of atrial fibrillation cases (sensitivity) and that it was 100% accurate in identifying study participants with normal sinus rhythm (specificity).