About half of participants receiving an irregular pulse notification contacted a study doctor. The positive predictive value (PPV) for the tachogram was 71 percent and the PPV for notification was 84 percent. 'These parameters help us understand how we, as clinicians, should think about these notifications.' It just means that AFib may not have been there at the time,' Turakhia said. So while only 34 percent of people who were still having AFib on the ambulatory ECG, that doesn't mean that 66 percent didn't have AFib. It's not surprising for it to go undetected in subsequent ECG patch monitoring.

'AFib can come and go, particularly early on in the course of the disease. AFib was identified in 34 percent of those who received a notification and wore the ECG patch. Patches were sent to 658 participants and 450 were returned and included in the analysis. Notification rates were most frequent in participants over age 65 (slightly >3.0 percent) and lowest among those under 40 (0.16 percent). The primary endpoints were AFib >30 seconds on ECG patch and simultaneous AFib on ECG patch and tachogram.Ī pulse notification was received by 2,161 participants (0.52 percent). Participants receiving a notification were prompted to contact the study doctor through the app for a video consultation to determine if the participant should wear an ECG patch. Detection of five of six repeat tachograms of an irregular pulse within a 48-hour period triggered a notification to be sent via the app. They were given information about the study when they downloaded the Heart Study app. Participants could not have AFib or be taking anticoagulants and were required to have an Apple Watch and compatible iPhone. The aim of the study, presented by Mintu Turakhia, MD, MS, was to identify patients with an irregular pulse watch notification who have AFib on a subsequent electrocardiogram (ECG) patch.Ī total of 419,297 people self-enrolled in the study. A tachogram is then created and is analyzed by an algorithm. The Apple Watch and corresponding Heart Study app uses photoplethysmography to intermittently measure blood flow activity and detect subtle changes that might indicate an irregular heartbeat. Offering a glimpse at how wearable technology may help flag potential health problems, the Apple Watch was able to detect atrial fibrillation (AFib) in a small group of people who had received an alert of an irregular heartbeat, said researchers presenting results from the Apple Heart Study at ACC.19 in New Orleans.

Apple ppt presentation 2019