Smartwatches and arrhythmias: How mobile tech reshape atrial fibrillation care

Mobile health (mHealth) technology is rapidly transforming the way atrial fibrillation (AF)—the most common cardiac arrhythmia—is detected, monitored, and managed. With the global burden of AF on the rise and many cases going undiagnosed until complications such as stroke occur, mobile devices are now at the forefront of early identification strategies. Smartphones, smartwatches, and connected wearable sensors allow individuals to monitor their heart rhythms in real time, shifting the initial detection of irregular heartbeats from clinics to patients’ wrists.

This review highlights various mHealth solutions, from photoplethysmography (PPG) apps and pulse-variability monitors to ECG-based handheld and wearable devices. While PPG tools, such as smartphone cameras and fitness bands, are ideal for general population screening due to their accessibility, ECG-based devices are preferred for clinical diagnosis, offering greater specificity. Some devices, including implantable loop recorders, provide long-term continuous monitoring, making them especially useful in high-risk populations, such as post-stroke patients.

Beyond rhythm tracking, mHealth tools also support treatment adherence, medication monitoring, and patient education through integrated apps and platforms. Mobile applications like the mAFA app have already demonstrated improved patient outcomes, reducing stroke and hospitalization rates by promoting guideline-based care pathways. Artificial intelligence (AI) is further enhancing these platforms by boosting detection accuracy and predicting AF episodes before they occur.

Despite promising advances, challenges remain—such as variability in diagnostic accuracy, limited standardization, data privacy concerns, and disparities in access. Nevertheless, the integration of mHealth into AF management represents a significant leap forward in democratizing care, engaging patients, and enabling early intervention in a condition that is often silent but potentially fatal.