HRV frequency-domain metrics during acute hemorrhagic shock and fluid resuscitation.

VLF = spectral power at the very low frequency; LF = spectral power at the low frequency; HF = spectral power at the high frequency; LF/HF = low to high frequency index ratio; Hemo5 = 5 minutes hemorrhage; Hemo10 = 10 minutes hemorrhage; Hemo15 = 15 minutes hemorrhage; Shock30 = 30 min after hemorrhagic shock; Shock60 = 60 min after hemorrhagic shock; R0 = immediately after fluid resuscitation; R60 = 60 min after fluid resuscitation; R120 = 120 min after fluid resuscitation; R180 = 180 min after fluid resuscitation
* = P<0.05 different from Baseline
†<0,05 different from CH5 and CH10
§ <0,05 different from CH5, CH10 e CH15
A = P<0.05 group NS different from group S.
Mean ± SD.