Ultra short term HRV analysis (e.g., HR within 10 s, RMSSD within 30 s) showed significant differences between baseline and mental stress, enabling reliable monitoring in mobile settings.
Observational (n=24)
Does ultra short term HRV analysis detect acute mental stress compared to baseline?
Ultra short term HRV analysis (10-50 seconds) can reliably detect acute mental stress, enabling mobile monitoring applications.
Heart rate variability (HRV) analysis is commonly used as a quantitative marker depicting the activity of autonomous nervous system (ANS) that may be related to mental stress. For mobile applications, short term ECG measurement may be used for HRV analysis since the conventional five minute long recordings might be inadequately long. Short term analysis of HRV features has been investigated mostly in ECG data from normal and cardiac patients. Thus, short term HRV features may not have any relevance on the assessment of acute mental stress. In this study, we obtained ultra short term HRV features from 24 subjects during baseline stage and Stroop color word test. We validated these HRV features by showing significant differences in HRV features existed between the two stages. Our results indicated that ultra short term analysis of heart rate and RR intervals within 10 s, RMSSD and PNN50 within 30 s, HF within 40 s, LF/HF, normalized LF, and normalized HF within 50 s could be reliably performed for monitoring mental stress in mobile settings.
Salahuddin et al. (2007) conducted an observational in Mental stress (n=24). Stroop color word test vs. Baseline stage was evaluated on Ultra short term HRV features. Ultra short term HRV analysis (e.g., HR within 10 s, RMSSD within 30 s) showed significant differences between baseline and mental stress, enabling reliable monitoring in mobile settings.