Key result
Preoperative anxiety was associated with an increase in the relative power of the higher frequency band of heart rate variability.
Why the study?
Does the degree of preoperative anxiety correlate with indices of heart rate variability in patients presenting for day case surgery?
Observational (n=32)
Does the degree of preoperative anxiety correlate with indices of heart rate variability in patients presenting for day case surgery?
Preoperative anxiety is associated with an increase in the relative power of the higher frequency band of heart rate variability, suggesting a relative vagal predominance in sympathovagal balance.
Answers are grounded in this paper and cite their sources.
Should not alter preoperative assessment; hypothesis-generating for HRV-anxiety links in day surgery.
Power spectral analysis of heart rate variability has been used to gain some understanding of the activity of the autonomic nervous system. In this study various indices of heart rate variability were related to the degree of preoperative anxiety experienced by 32 patients presenting for day case surgery. It was found that there was no correlation between anxiety and mean heart rate, or between anxiety and the spectral power in the mid frequency band (0.05-0.15 Hz). However, there was an increase in the relative power of the higher frequency band (0.15-0.5 Hz) with increasing anxiety levels (Spearman correlation r = 0.4034). This suggests that preoperative anxiety may often be associated with a relative vagal predominance in the sympathovagal balance.
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Sleigh et al. (1995) conducted an observational in Preoperative anxiety (n=32). Preoperative anxiety was evaluated on Correlation between anxiety and heart rate variability indices (r = 0.4034). Preoperative anxiety was associated with an increase in the relative power of the higher frequency band of heart rate variability.
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