Smartwatches Help Detect Abnormal Heart Rhythms 4x More Often In Clinical Trial

A clinical trial found that seniors at high stroke risk who wore an Apple Watch were four times more likely to have hidden heart rhythm disorders detected than those receiving standard care. The researchers noted that over half the time, these smartwatch wearers with heart rhythm problems hadn’t shown any symptoms prior to diagnosis. Later editions of Apple Watches are equipped with two functions that can help monitor heart health — photoplethysmography (PPG), which tracks heart rate, and a single-lead electrocardiogram (ECG) that monitors heart rhythm. “Using smartwatches with PPG and ECG functions aids doctors in diagnosing individuals unaware of their arrhythmia, thereby expediting the diagnostic process,” said senior researcher Dr. Michiel Winter, a cardiologist at Amsterdam University Medical Center in The Netherlands. “Our findings suggest a potential reduction in the risk of stroke, benefiting both patients and the health care system by reducing costs,” Winter said in a news release.

[…] Smartwatches are much easier than other wearable devices for detecting irregular heart rhythms […]. These other means require people to wear sticky leads, carry around bulky monitors or even receive short-term implants. Lead researcher Nicole van Steijn, a doctoral candidate at Amsterdam UMC, noted that wearables that track both the pulse and electrical activity have been around for a while. “However, how well this technology works for the screening of patients at elevated risk for atrial fibrillation had not yet been investigated in a real-world setting,”she said in a news release.