Fig. 2
Distribution of HRV indices reflecting the general activity of ANS by pathogens in different severities. Figure shows HRV indices according to pathogen (EVA-71 red, other viruses green) and severity of disease. Mild (Grade 2a), Severe (Grades 2b1& 2b2) very severe (Grades 3 & 4). Panels above-below from left to right: High Frequency (HF) (ms2); High frequency normalized units (HFnu) (%); Low Frequency (LF) (ms.2); Low Frequency normalized units (LFnu) (%); SD1 (ms); SD1 normalizised units (%); SD2 (%); SD2 (ms); SD2 normalized units (%)