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Table 3 Explanation of HRV parameters according to the Kubios Manual [25]

From: Activation of the stress response among the cardiac surgical residents: comparison of teaching procedures and other (daily) medical activities

HRV-parameter

Description

Activity as part of the autonomic nervous system

Reaction with increased stress

Overview stress parameter

Stress index

The square root (to make the index normally distributed) of the Baevsky’s stress index

SNS

PNS index

Parasympathetic nervous system activity compared to normal resting values (PNS tone described by Mean RR, RMSSD and SD1(%)

PNS

SNS index

Sympathetic nervous system activity compared to normal resting values (SNS tone described by Mean HR, Stress Index and SD2(%))

SNS