PMID: 16508402Mar 2, 2006Paper

Heart rate variability predicts severe hypotension after spinal anesthesia

Anesthesiology
Robert HanssPeter H Tonner

Abstract

Hypotension due to vasodilatation after spinal anesthesia (SA) may be harmful. Heart rate variability, an indirect measure of autonomic control, may predict hypotension. One hundred patients were studied. Retrospectively, heart rate variability was analyzed in 30 patients, classified depending on the lowest systolic blood pressure (SBP) after SA. Seventy patients were studied prospectively, assigned to one of two groups by their low to high frequency ratio (LF/HF) before SA. Sensitivity and specificity of LF/HF for prediction of decrease of SBP greater 20% of baseline were tested. Retrospective analysis showed differences of LF/HF depending on the degree of hypotension after SA. Prospective analysis demonstrated significant differences of SBP after SA depending on baseline LF/HF (mean +/- SD): low LF/HF (1.3 +/- 0.7) = > SBP: 91 +/- 8% of baseline versus high LF/HF (5.5 +/- 2.4) = > SBP: 66 +/- 10% of baseline (P < 0.05). Baseline LF/HF as well as high frequency and proportional decrease of SBP after SA correlated significantly, in contrast to baseline hemodynamic parameters heart rate and SBP. A receiver operator curve characteristic analysis showed a sensitivity and specificity of LF/HF > 2.5 of 85% to predict SBP decrease of...Continue Reading

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Citations

Mar 3, 2007·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Alain DeschampsKaren Loo
Feb 4, 2010·Medical & Biological Engineering & Computing·Abdugheni KutlukMasashi Kawamoto
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Feb 10, 2021·British Journal of Anaesthesia·Solam LeeSang Baek Koh
Dec 15, 2020·Computer Methods and Programs in Biomedicine·Guang ZhangFeng Chen

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