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Proceedings Paper

Visualization of short-term HRV as an index for mental stress evaluation
Author(s): Feng Wang; Mami Tanaka; Seiji Chonan
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Paper Abstract

This paper proposes a new method for visualization of the Heart Rate Variability (HRV) as a visual presentation for mental stress evaluation using the Symmetrized Dot Patterns (SDP) presentation. With this method, time series of the R-R intervals of the electrocardiogram (ECG) are mapped into a polar space and plot out as a scatter plot on the polar graph. The proposed method is testified with the ECG data of fourteen subjects during the mental work-load experiments. Mental arithmetic tasks were used for applying mental work load to the subjects. Experimental results show significant difference of the SDP of the R-R intervals between the mental workload phase and the rest phase, and the difference can be easily recognized. This fact verifies that the proposed method can serve as a visual presentation for the real-time evaluation of mental stress.

Paper Details

Date Published: 9 January 2008
PDF: 6 pages
Proc. SPIE 6794, ICMIT 2007: Mechatronics, MEMS, and Smart Materials, 67943R (9 January 2008);
Show Author Affiliations
Feng Wang, Maebashi Institute of Technology (Japan)
Mami Tanaka, Tohoku Univ. (Japan)
Seiji Chonan, Akita Prefectural Univ. (Japan)

Published in SPIE Proceedings Vol. 6794:
ICMIT 2007: Mechatronics, MEMS, and Smart Materials
Minoru Sasaki; Gisang Choi Sang; Zushu Li; Ryojun Ikeura; Hyungki Kim; Fangzheng Xue, Editor(s)

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