Atrial fibrillation is better recognized
By far the most important improvement that the ECG app 2 included in watchOS 7.2 brings with it concerns the detection of potentially life-threatening atrial fibrillation. So far, the Apple Watch could only determine these arrhythmias at heart rates of a maximum of 120 beats per minute. After the update, the occurrence of the phenomenon known by the abbreviation AFib will be detected at frequencies between 50 and 150 beats. If the pulse is above or below, however, there may still be no or incorrect results.
ECG app tested in clinical trials
I’m updated now Support document Apple explains that version 2 of the ECG app was tested in a series of clinical trials with 546 people. The detection of atrial fibrillation resulted in an accuracy of 98.5 percent. Other arrhythmias were recognized 99.3 percent correctly. The iPhone group expressly points out, however, that the AFib determination does not work correctly under certain circumstances, for example with people with pacemakers or in the case of certain individual physiological conditions. In such cases, the Apple Watch reports the result as “ambiguous”.
Improved accuracy of the EKG app
In addition, Apple says it has improved the accuracy of the EKG app. After the update to watchOS 7.2, for example, it is no longer absolutely necessary to rest your hand on a table surface while performing the electrocardiogram. However, arm movements can still lead to the measurement not being meaningful enough. In such a case, the result is provided with a corresponding note and the ECG should then be repeated while the hand is held as still as possible.
Apple Watch Series 6 in the Apple Online Store