Seismocardiography (SCG) is the technique to measure microscale vibrations of the chest, which is closely related to the mechanical activity of the heart. To date, only a few studies have reported technical solutions to remotely measure SCG signals with soft electronics using stretchable, piezoelectric thin films. In this study, however, we demonstrate a contactless wearable patch using a 28-μm-thick foil of the piezoelectric polymer polyvinylidene fluoride. As a technical advancement, we utilize near-field communication (NFC) technology to power the patch and to record the SCG data wirelessly. A separated electrocardiogram (ECG) is used as a reference. Our results show expected waveforms of the recorded SCG signals with good signal-to-noise ratios and a close correlation between SCG and ECG recordings. The SCG technique adds an additional tool for cardiac monitoring, which is tightly associated with an ECG. The SCG method could be combined with other techniques in wearable on-skin electronics with multiple functionality for advanced cardiovascular monitoring.

No abstract

No abstract

No abstract

Soft, stretchable, and flexible electrodes offer a unique and nonintrusive option to monitor essential biopotential signals from the skin, which can be related to the functioning and status of different organs including the heart. Such stretchable electrodes, by forming an intimate contact to the human skin, not only increase the signal-to-noise ratio of the recorded biopotentials and reduce eventual signal artifacts, but are also more pleasant to wear. We developed a stretchable electrode patch for electrocardiogram (ECG) monitoring utilizing the medical-grade, transparent, and stretchable material Styrene-ethylene-butylene-styrene (SEBS). Our fabrication process is compatible with standard micro- and nano clean room processes and could be up-scaled accordingly.