Preoperative | Postoperative | |
---|---|---|

Normoglycemia | ||

RR (s) | 0.92 (0.04) | 1.08 (0.01)*** |

P_{TOT} (ms^{2}, log) | 3.64 (0.05) | 3.79 (0.03)*** |

P_{LF} (ms^{2}, log) | 3.11 (0.05) | 3.21 (0.03)** |

P_{HF} (ms^{2}, log) | 2.88 (0.12) | 3.02 (0.03)*** |

P_{LF}/P_{HF} ratio (log) | 0.23 (0.03) | 0.19 (0.03) |

Hypoglycemia | ||

RR (s) | 0.89 (0.04) | 0.99 (0.01)*** |

P_{TOT} (ms^{2}, log) | 3.57 (0.06) | 3.77 (0.04)*** |

P_{LF} (ms^{2}, log) | 3.01 (0.06) | 3.13 (0.04)** |

P_{HF} (ms^{2}, log) | 2.66 (0.07) | 2.89 (0.05)*** |

P_{LF}/P_{HF} ratio (log) | 0.36 (0.10) | 0.25 (0.03)*** |

Change from normoglycemia to hypoglycemia | ||

RR (s) | −0.03 (0.02) | −0.08 (0.01)*** |

P_{TOT} (ms^{2}, log) | −0.07 (0.06) | −0.01 (0.03) |

P_{LF} (ms^{2}, log) | −0.09 (0.07) | −0.07 (0.04) |

P_{HF} (ms^{2}, log) | −0.23 (0.07) | −0.14 (0.04)^{*} |

P_{LF}/P_{HF} ratio (log) | 0.14 (0.05) | 0.07 (0.03)^{*} |

Values are given as the mean (SEM). Spectral indices are log-transformed. Hypoglycemia, 90–165 min; normoglycemia, 0–60 min; RR, mean interbeat R-R interval. Results indicate higher parasympathetic activity during normoglycemia postsurgery and lower sympathetic response to hypoglycemia postsurgery.

*

*P*< 0.05; ***P*< 0.01; ****P*< 0.001.