New Study Finds Wearable ECG Monitor Detects Missed AFib in Cardiac Surgery Patients After Discharge

Continuous cardiac monitoring with Vivalink devices following surgical discharge may improve early detection of postoperative arrhythmias, according to researchers at Brigham and Women’s Hospital

CAMPBELL, Calif., July 15, 2025 /PRNewswire/ — Vivalink, a leading provider of digital healthcare solutions, announces its wearable ECG monitor is supporting research at Brigham and Women’s Hospital in Boston aimed at understanding and improving detection of postoperative atrial fibrillation (poAF). Preliminary findings, presented at Euroanaesthesia 2025 in Portugal, show that continuous cardiac rhythm monitoring for up to 14 days after cardiac surgery helped uncover cases of poAF that may have gone undetected during the hospital stay.

Atrial fibrillation (AFib) remains the most common adverse event following cardiac surgery, affecting up to 40-50% of patients and contributing to increased morbidity and mortality. Ongoing research at Brigham and Women’s Hospital aims to characterize the incidence of poAF and evaluate whether wearable cardiac devices can improve AFib detection after patient discharge.

The study, Postoperative Atrial Fibrillation (poAF) after Cardiac Surgery: Bridging the Gap in Detection with a Wearable Cardiac Rhythm Monitoring Device, enrolled 100 patients who underwent open-heart surgery with cardiopulmonary bypass. Researchers compared in-hospital ECG results and data from Vivalink’s wearable ECG monitor for up to 14 days after discharge to detect poAF. In 24% of patients who developed poAF, the arrhythmia was first identified on the wearable monitor and had not been detected while hospitalized. In 80% of these cases, AFib was not diagnosed using standard modalities until the three-month follow-up. These initial results suggest continuous monitoring after discharge may improve the detection of arrhythmias and help inform faster intervention.

“It’s incredible we’re detecting arrhythmias within 14 days following discharge that otherwise wouldn’t have been caught until three months postoperatively,” said study author Jakob Wollborn, MD, MPH, cardiothoracic anesthesiologist and intensivist at Brigham and Women’s Hospital. “We’re learning more about how and when postoperative atrial fibrillation presents itself, so we can better inform treatment and monitoring guidelines to keep patients safe when they leave the hospital.”

Vivalink’s wearable ECG monitor is a small reusable, rechargeable patch that streams diverse health parameters to the Vivalink Biometrics Data Platform in the cloud, which includes an arrhythmia detection algorithm and clinician portal.

The full abstract (32AP03-4) can be found here on page 422. For more information about Vivalink, click here.

About Vivalink
Vivalink is a provider of digital healthcare solutions for virtual care and decentralized clinical trials. Its unique platform leverages physiology-optimized medical wearable sensors and data services to enable a deeper and more clinical understanding between provider and patient.

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