Contactless analysis of heart rate variability during cold pressor test using radar interferometry and bidirectional LSTM networks

Shi K, Steigleder T, Schellenberger S, Michler F, Malessa A, Lurz F, Rohleder N, Ostgathe C, Weigel R, Kölpin A (2021)

Publication Language: English

Publication Status: In press

Publication Type: Journal article, Original article

Future Publication Type: Journal article

Publication year: 2021

Journal

Scientific Reports Nature Publishing Group: Open Access Journals - Option B

Book Volume: 11

Journal Issue: 1

URI: https://www.nature.com/articles/s41598-021-81101-1

DOI: 10.1038/s41598-021-81101-1

Open Access Link: https://www.nature.com/articles/s41598-021-81101-1

Abstract

Contactless measurement of heart rate variability (HRV), which reflects changes of the autonomic

nervous system (ANS) and provides crucial information on the health status of a person, would

provide great benefits for both patients and doctors during prevention and aftercare. However, gold

standard devices to record the HRV, such as the electrocardiograph, have the common disadvantage

that they need permanent skin contact with the patient. Being connected to a monitoring device

by cable reduces the mobility, comfort, and compliance by patients. Here, we present a contactless

approach using a 24 GHz Six-Port-based radar system and an LSTM network for radar heart sound

segmentation. The best scores are obtained using a two-layer bidirectional LSTM architecture. To

verify the performance of the proposed system not only in a static measurement scenario but also

during a dynamic change of HRV parameters, a stimulation of the ANS through a cold pressor test is

integrated in the study design. A total of 638 minutes of data is gathered from 25 test subjects and

is analysed extensively. High F-scores of over 95% are achieved for heartbeat detection. HRV indices

such as HF norm are extracted with relative errors around 5%. Our proposed approach is capable to

perform contactless and convenient HRV monitoring and is therefore suitable for long-term recordings

in clinical environments and home-care scenarios.

Authors with CRIS profile

Kilin Shi Lehrstuhl für Technische Elektronik Tobias Steigleder Department of Palliative Medicine Sven Schellenberger Lehrstuhl für Technische Elektronik Fabian Michler Lehrstuhl für Technische Elektronik Anke Malessa Department of Palliative Medicine Nicolas Rohleder Lehrstuhl für Gesundheitspsychologie Christoph Ostgathe Professur für Palliativmedizin Robert Weigel Lehrstuhl für Technische Elektronik

Related research project(s)

More quality of life and safety for people in need of care: Innovative contactless monitoring of vital parameters (GUARDIAN) GUARDIAN Jan. 1, 2017 - May 31, 2020 Mehr Lebensqualittät und Sicherheit für schwerkranke Menschen durch Berührungslose Aufzeichnung von Herzschlag und Atmung - klinisch-experimentelle Untersuchungen (GUARDIAN_UKER) Mehr Lebensqualität und Sicherheit für pflegebedürftige Menschen: Innovative berührungslose Überwachung von Vitalparametern Jan. 1, 2017 - May 31, 2020

Involved external institutions

Technische Universität Hamburg-Harburg (TUHH) DE Germany (DE)

How to cite

APA:

Shi, K., Steigleder, T., Schellenberger, S., Michler, F., Malessa, A., Lurz, F.,... Kölpin, A. (2021). Contactless analysis of heart rate variability during cold pressor test using radar interferometry and bidirectional LSTM networks. Scientific Reports, 11(1). https://dx.doi.org/10.1038/s41598-021-81101-1

MLA:

Shi, Kilin, et al. "Contactless analysis of heart rate variability during cold pressor test using radar interferometry and bidirectional LSTM networks." Scientific Reports 11.1 (2021).

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