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• W4309279644 endingPage "103051" @default.
• W4309279644 startingPage "103051" @default.
• W4309279644 abstract "Background Heart rate variability (HRV) may provide an estimation of the autonomous nervous system (ANS) integrity in critically ill patients. Disturbances of cerebral autoregulation (CAR) may share common pathways of ANS dysfunction. Aim To explore whether changes in HRV and CAR index correlate in critically ill septic patients. Methods Prospectively collected data on septic adult (> 18 years) patients admitted into a mixed Intensive Care between February 2016 and August 2019 with a recorded transcranial doppler CAR assessment. CAR was assessed calculating the Pearson's correlation coefficient (i.e. mean flow index, Mxa) between the left middle cerebral artery flow velocity (FV), insonated with a 2-MHz probe, and invasive blood pressure (BP) signal, both recorded simultaneously through a Doppler Box (DWL, Germany). MATLAB software was used for CAR assessment using a validated script; a Mxa >0.3 was considered as impaired CAR. HRV was assessed during the same time period using a specific software (Kubios HRV 3.2.0) and analyzed in both time-domain and frequency domain methods. Correlation between HRV-derived variables and Mxa were assessed using the Spearman's coefficient. Results A total of 141 septic patients was studied; median Mxa was 0.35 [0.13–0.60], with 77 (54.6 %) patients having an impaired CAR. Mxa had a significant although weak correlation with HRV time domain (SDNN, r = 0.17, p = 0.04; RMSSD, r = 0.18, p = 0.03; NN50, r = 0.23, p = 0.006; pNN50, r = 0.23, p = 0.007), frequency domain (FFT-HF, r = 0.21; p = 0.01; AR-HF, r = 0.19; p = 0.02), and non-linear domain (SD1, r = 0.18, p = 0.03) parameters. Impaired CAR patients had also all of these HRV-derived parameters higher than those with intact CAR. Conclusions In this exploratory study, a potential association of ANS dysfunction and impaired CAR during sepsis was observed." @default.
• W4309279644 created "2022-11-25" @default.
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• W4309279644 date "2023-01-01" @default.
• W4309279644 modified "2023-09-28" @default.
• W4309279644 title "Correlation between heart rate variability and cerebral autoregulation in septic patients" @default.
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• W4309279644 doi "https://doi.org/10.1016/j.autneu.2022.103051" @default.
• W4309279644 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36493585" @default.
• W4309279644 hasPublicationYear "2023" @default.
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