Key result
Head pulsation signals acquired via 3-axis accelerometers showed a deviation of mean heart rate against ECG of ≤1 bpm for all recordings in healthy volunteers.
Why the study?
Brain pulsation signal characteristics change in conditions like traumatic brain injury, prompting the need to validate a custom multi-axial accelerometer system to analyze head pulsation signals.
Observational (n=5)
Effect estimate: ≤1 bpm
A custom 3-axis head-worn accelerometer system can accurately estimate heart rate and heart rate variability in healthy supine volunteers compared to ECG, providing a foundation for non-invasive brain pulsation monitoring.
Validates multi-axis accelerometer system for head pulsation analysis; leaves open clinical utility in TBI.
Previously, using single-axis accelerometers, it has been proposed that in conditions such as traumatic brain injury (TBI) the brain pulsation signal characteristics change, potentially due to changes induced by the impact to the brain. In this paper, we aim to validate the use of a custom built embedded measurement system towards the analysis of the head pulsation signals. The system comprises of several synchronized high sampling rate 3-axis accelerometers and a simultaneous chest ECG. In our case three accelerometers on the surface of human head are used (in left temple, forehead and right temple), while the subject were in supine position. To illustrate that a proper signal quality may be extracted, we derive heart rate (HR) and heart rate variability (HRV) from each sensor and each axis for each of five healthy male volunteers. The results are reported against ECG as the ground truth. This study will build ground for further clinical trial utilizing multi-axial accelerometers to study both healthy and diseased subjects (e.g. TBI patients).
No takes yet. Share an insight, caveat, or question.
Lahdenoja et al. (2019) conducted an observational in Healthy (n=5). 3-axis head-worn accelerometers vs. Simultaneous chest ECG was evaluated on Deviation of mean heart rate (HR) against ECG (≤1 bpm). Head pulsation signals acquired via 3-axis accelerometers showed a deviation of mean heart rate against ECG of ≤1 bpm for all recordings in healthy volunteers.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: