Related Experiment Video

Updated: Feb 14, 2026

In Vitro Thrombosis Test for Ventricular Assist Devices

In Vitro Thrombosis Test for Ventricular Assist Devices

Published on: March 21, 2025

Signal artefacts in wearable-based biosignal acquisition in patients with ventricular assist devices: the SMART-VADCH

Emanuel Heil^1,2,3, Luise Roehrich^2,3,4, Lena Reichert^2,3,4

¹Department of Cardiology, Deutsches Herzzentrum der Charité (DHZC), Angiology and Intensive Care Medicine, Charitéplatz 1, Berlin 10117, Germany.

European Heart Journal. Digital Health

|February 13, 2026

Abstract

Aims:

Telemonitoring is increasingly used in cardiovascular care, yet data on the reliability of smartwatch-based biosignal acquisition in patients with advanced heart failure and LVAD support remain limited. This study evaluated the feasibility and accuracy of smartwatch-derived heart rate (HR), oxygen saturation (SpO₂), and single-lead ECG measurements in this population.

Methods And Results:

In this prospective, single-centre pilot study, patients without LVAD or with durable (HeartMate 3) or temporary (Impella 5.5) LVADs underwent parallel resting measurements using a consumer smartwatch and standard clinical. Measurements unsuccessful after three attempts were classified as failures. Thirty-eight patients were enrolled (15 heart failure, 15 durable LVAD, 8 temporary LVAD). In patients without LVAD, HR was feasible in all patients and accurate within a 5% tolerance in 93% (95% CI 70-99%). At least one interpretable ECG was obtained in all, although QRS duration met a 10% tolerance in 33%. SpO₂ was feasible and accurate in 93%. In LVAD, HR was feasible in all patients and accurate in 82%. ECG was technically successful in all. QRS complexes were distinguishable in 73% of durable and all temporary LVAD. SpO₂ feasibility was overall limited (36%), but higher in temporary than durable LVAD patients (63% vs. 20%), and accurate when successful. SpO₂ failure was observed in patients without aortic valve opening, with tachycardia >100 bpm, and with darkly pigmented skin.

Conclusion:

The evaluated wrist-worn smartwatch reliably provided HR and ECG measurements in advanced heart failure, including LVAD patients, whereas SpO₂ performance remains limited.

Keywords:

Artificial Pulse Heart Failure Left ventricular assist device (LVAD)Smart Devices Telemonitoring Wearables

More Related Videos

Electroencephalographic Signal Acquisition Framework for Neurodiverse: A Case Study of Dolphin-Assisted Therapy

Electroencephalographic Signal Acquisition Framework for Neurodiverse: A Case Study of Dolphin-Assisted Therapy

Published on: June 27, 2025

Use of Two Intracorporeal Ventricular Assist Devices As a Total Artificial Heart

Use of Two Intracorporeal Ventricular Assist Devices As a Total Artificial Heart

Published on: May 11, 2018

Related Concept Videos

Trial and Error and Algorithm

Trial and Error and Algorithm

A problem-solving strategy is a plan of action used to find a solution. Different strategies have distinct action plans. Trial and error involves trying different solutions until one works. For instance, to fix a broken printer, you might check ink levels, ensure the paper tray isn't jammed, and verify the printer's connection to your laptop. This method can be time-consuming but is commonly used. Thomas Edison, for example, used trial and error to find a suitable filament for the light...

Clinical Trials: Overview

Clinical Trials: Overview

Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...

Clinical Trials

Clinical Trials

Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...

Light Acquisition

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

Water and Mineral Acquisition

Water and Mineral Acquisition

Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.

Endocrine Signaling

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.

Articles linked to this work by shared authors, journal, and citation graph.

Cluster-Based Phenotyping in an HFpEF Population Identifies a Biomarker-High, Atrial-Dysfunction Phenotype with Impaired Quality of Life, Reduced Exercise Capacity and Higher Healthcare Utilization.

Journal of clinical medicine·2026

Early Implementation of a Nationwide Opt-Out Electronic Health Record for Outpatient Care in Germany: Qualitative Semistructured Interview Study.

Journal of medical Internet research·2026

Outcome-Guided Immunosuppressive Therapy and Clinical Events in Patients With Cardiac Sarcoidosis: An Observational Registry.

Journal of the American Heart Association·2026

Rationale and design of the AutoHealth study: prospective clinical validation of continuous multimodal in-vehicle health monitoring in real-world mobility.

European heart journal. Digital health·2026

Mortality reduction with implanted defibrillator for primary prevention of sudden death after Myocardial Infarction: temporal trends in the PROFID study.

European heart journal·2026

Early Multicenter Outcomes of Dedicated Transcatheter Aortic Valve Replacement for Left Ventricular Assist Device-Associated Pure Aortic Regurgitation.

Artificial organs·2026

See all related articles