Abstract:many clinical studies done on the changes of heart rate variability (HRV) during anesthesia have analysed and reported their results using only absolute values without any problems, 1-4 and some have even suggested that the normalisation of spectral powers does not reveal any additional information compared to the low frequency/high frequency (LF/HF) index. 5 LabChart v7 software (ADInstruments, Co., Sydney, NSW, Australia) was used for analysis of HRV in our study, and the LF/HF ratio offered by this program … Show more
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