Changes in Heart Rate Variability in Elderly Hypertensive Patients during Combined Spinal-Epidural Anesthesia / 대한마취과학회지

ABSTRACT

BACKGROUND: We evaluated the changes in heart rate variability (HRV) in elderly patients with or without hypertension before and after combined spinal-epidural anesthesia (CSE). METHODS: Elderly hypertensive (group H, n = 28) and non-hypertensive patients (group C, n = 32) were recruited. We analyzed the spectral components of HRV, total power ( or = T6 [H]) according to fixed analgesia level. RESULTS: Before CSE, group H showed significantly lower LnLF than that of group C (P < 0.05). Fifteen and 10 min after CSE, decrease of SBP and increase of HR in group HH were significantly greater compared with group CL and lesser with group CH, respectively. LnTP, LnLF and LnHF in both control groups (CL and CH) were significantly decreased 15-20 min after CSE compared with pre-CSE values. LnLF and LnHF in group HH were significantly lower than those in group HL 10-15 min after CSE. But there were no significant changes of LFnorm, HFnorm and LF/HF in all four groups. CONCLUSIONS: The group H showed significantly lower LnLF than that of group C before CSE. In group HH, LnLF and LnHF were significantly lower than those in group HL 10-15 min after CSE, but the balance of the autonomic nervous system was not changed significantly.