Research Article

Linear and Complex Measures of Heart Rate Variability during Exposure to Traffic Noise in Healthy Women

Figure 3

Mean heart rate and HRV analysis before (control) and during traffic noise exposure. pNN50: the percentage of adjacent RR intervals with a difference of duration greater than 50 ms; RMSSD: root-mean square of differences between adjacent normal RR intervals in a time interval; SDNN: standard deviation of normal-to-normal RR intervals; HR: heart rate; : level of significance.