Tthe first company in Silicon Valley last year offered an EKG service to the Apple Watch 4 series.
But doctors have previously expressed concern about the accuracy of technology and have called for its use to be in tandem with appropriate consultations.
According to the NHS, atrial fibrillation affects about 1 million people in the UK and can affect adults of any age. The researchers concluded that the study data could be used as an additional tool by doctors who diagnose patients.
"The doctor can use the information from the study, combine them with their assessment …. And then make clinical decisions about what to do with an alert," says Dr Marco Perez, Dr. Marco Perez, Leading Researcher of the study.