Revolutionizing Heart Failure Care: The Role of Smartwatches
To Paula Vanderpluym, her smartwatch may simply be a fashionable accessory; however, for a cadre of researchers based in Toronto, it embodies a significant advancement in proactive healthcare for individuals grappling with heart failure.
A groundbreaking study spearheaded by investigators at the University Health Network (UHN) and the University of Toronto unveils that data harvested from consumer smartwatches can discern early indicators of deteriorating heart failure—days or even weeks prior to necessitating unscheduled medical attention.
The findings, featured prominently on the cover of Nature Medicine, imply that monitoring physical fitness through wearable technology, such as the Apple Watch, can facilitate the immediate identification of fluctuations in cardiovascular health without additional testing or undue exertion from patients.
These fluctuations can serve as precursors, thereby empowering healthcare providers to act swiftly and deliver timely interventions.
Moreover, the researchers established that patients exhibiting a decline of 10 percent or more in daily cardiopulmonary fitness faced a risk of unplanned hospitalization or urgent care that was more than three times greater than that of others.
“Our focus has been on innovating ways to manage, treat, and monitor patients in their everyday environments,” stated Heather Ross, a cardiologist at UHN’s Peter Munk Cardiac Centre, as well as a professor within U of T’s Temerty Faculty of Medicine and a co-senior author on the study.
“The implications are potentially transformative, as we can now pinpoint signals indicating that a patient is heading towards a crisis before they require emergency intervention.”
Paula Vanderpluym felt an enhanced sense of connection with her medical team while utilizing an Apple Watch during the study (photo courtesy of UHN)
Vanderpluym, a participant diagnosed with hypertrophic cardiomyopathy at the tender age of 18, has navigated her health challenges as a UHN patient for the majority of her life, culminating in a heart failure diagnosis by age 60.
Her experience with the Apple Watch engendered a feeling of heightened care and connectivity with both her healthcare practitioners and the study’s researchers.
“The prospect that doctors could leverage this data for predicting health decline and intervening before hospital admission was something I eagerly embraced to contribute to,” she remarked.
Remote Monitoring of Cardiology Patients
Heart disease stands as the second-leading cause of mortality in Canada. The condition known as heart failure—characterized by the heart’s inability to pump sufficient blood throughout the body—affects approximately 64 million individuals globally.
Furthermore, the Canadian Institute for Health Information designates heart failure as one of the top five reasons for hospitalization in the nation, rendering it a significant contributor to healthcare expenditures.
Given this context, there exists an increasing demand for accessible clinical assessment tools aimed at the early monitoring and treatment of heart failure outside of hospital settings.
Conventionally, healthcare providers depend on in-person consultations to gather data necessary for managing heart failure; thus, they are often presented with only a transient glimpse of a patient’s health. Consequently, flagging evolving symptoms or warning signs that occur between visits may be overlooked.
This study, involving researchers from the Ted Rogers Centre for Heart Research and Transform HF, a U of T institutional strategic initiative, scrutinized data from 217 individuals with heart failure over a three-month span as they engaged in their quotidian activities.
Apple provided 200 iPhone and Apple Watch devices for this endeavor, contributed to the manuscript review, and collaborated with all authors in developing a specialized mobile application.
The research team independently orchestrated the design, model development, analysis, and writing of the study.
Participants donned Apple Watches that supplied the researchers with crucial information, including heart rate, physical activity levels, and oxygen saturation.
Previously, uncertainty prevailed regarding whether such metrics could effectively estimate patient health status and the likelihood of requiring unplanned medical care in individuals with heart failure.
“The truly innovative aspect of our research lies in its ability to procure unobtrusive, real-time data from patients in their natural environments,” remarked Chris McIntosh, a senior scientist at UHN and assistant professor across medical biophysics, computer science, and medical imaging at U of T, who also serves as a co-senior author of the study.
“We aren’t merely gauging how briskly someone traverses a hospital corridor under the watchful eye of healthcare professionals; rather, we are observing heart rate variations during their leisurely strolls through the mall, on the street, or within the confines of their homes.”
Employing AI to Analyze Cardiovascular Data
Utilizing a UHN-developed and externally validated artificial intelligence model, the research team—comprising doctoral candidate Yuan Gao and Yas Moayedi, a clinician-scientist at UHN and assistant professor at Temerty Medicine—evaluated patterns in the wearable data to ascertain daily cardiopulmonary fitness, which is pivotal in understanding the synergy between heart and lung function.
The researchers discovered that the smartwatch-generated fitness data and estimates closely aligned with outcomes from formal clinical exercise assessments conducted within the hospital at both the commencement and conclusion of the study.
Shifts in cardiopulmonary fitness over time could significantly impact a patient’s propensity for unplanned medical attention, thereby offering valuable insights to clinicians.
“These day-to-day fluctuations represent a realm we have yet to fully explore,” McIntosh added.
The results grant a pivotal opportunity for the implementation of patient-centric care through proactive treatments, medication fine-tuning, and other vital interventions.
Members of the research team include (from left to right): Mike Walker, Yuan (William) Gao, Chris McIntosh, Yas Moayedi, and Heather Ross (photo courtesy of UHN)
Paving the Future of Cardiac Care
For Vanderpluym, engaging in this study presented a straightforward yet significant avenue to support advancements in healthcare accessibility.
“Numerous individuals residing in rural locales lack equivalent access to medical facilities. Wearable technology and the innovations from this research can bridge those gaps,” she observed.
This study signifies a monumental leap forward in innovation at the Peter Munk Cardiac Centre, where teams specializing in clinical practice, digital health, and artificial intelligence collaboratively explore how to harness digital instruments and real-world applications of AI for enhancing cardiovascular care.
“Such research could only thrive here. This initiative showcases UHN’s dedication to translating innovation into practical clinical tools via an immensely interdisciplinary approach,” proclaimed McIntosh.
Future investigations will delve into how advancements in wearable monitoring can be seamlessly integrated into patient care protocols to bolster outcomes.
“The ultimate aspiration is to establish a non-intrusive, nearly continuous monitoring device that empowers us to observe a patient’s status and act upon any changes,” concluded Ross.
This research received support from the Ted Rogers Centre for Heart Research, the Natural Sciences and Engineering Research Council of Canada (NSERC), the Canadian Institutes of Health Research (CIHR), the University of Toronto, and the UHN Foundation.
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