Beat-to-beat blood pressure variability and heart rate variability in relation to autonomic dysregulation in patients with acute mild-moderate ischemic stroke
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AbstractAutonomic dysregulation is common in post-stroke patients. We aimed to correlate beat-to-beat blood pressure variability (BPV) and heart rate variability (HRV) with Ewing's test classification. We enrolled patients with acute ischemic stroke. Autonomic function was assessed by Ewing battery and dichotomized into minor or significant group. Beat-to-beat blood pressure and heart rate were monitored for calculating the frequency components of BPV and HRV using power spectral analysis [very low frequency (VLF; <0.04 Hz); low frequency (LF; 0.04-0.15 Hz); high frequency (HF; 0.15-0.40 Hz); power spectral density (PSD; <0.40 Hz) and LF/HF ratio]. In minor autonomic dysregulation group, BPV and HRV were similar with those in controls (all p > 0.05). However, LF/HF ratio in BPV and HRV significantly reduced in significant autonomic dysregulation group compared with that in controls (all p < 0.05). LF BPV in significant group was lower than that in controls. In patients, LF and LF/HF BPVs were positively correlated with parasympathetic parameters, while VLF HRV was negatively correlated with sympathetic parameters and the others were positively correlated with parasympathetic parameters. With cut-off values of 1.80 for LF/HF diastolic BP, 0.96 for the LF/HF systolic BP and 1.80 for LF/HF HRV, the sensitivity (53.80%, 69.20% and 53.80%, respectively) and specificity (92.50%,.80.00% and 92.50%, respectively) of these parameters were observed to predict autonomic dysregulation.

Autonomic dysregulation is associated with lower variation of blood pressure and heart rate in acute ischemic stroke. Non-invasive monitoring of beat-to-beat BPV and HRV may be an alternative to autonomic dysregulation measure. (C) 2019 Elsevier Ltd. All rights reserved.
All Author(s) ListTian, G., Xiong, L., Leung, H.Soo, Y., Leung, T., Wong, L. K.
Journal nameJournal of Clinical Neuroscience
Detailed descriptionEpub on 17.3.2019
Volume Number64
PublisherElsevier: 12 months
Pages187 - 193
LanguagesEnglish-United Kingdom
KeywordsAutonomic dysfunction, blood pressure, heart rate, ischaemic stroke.

Last updated on 2021-27-01 at 01:42