Continuous, On-Line, Real-Time Spectral Analysis of Heart Rate Variations during Anesthesia
The autonomic nervous system (ANS) is of vital importance in regulating cardiovascular homeostasis. Most anesthetics, muscle relaxants, and surgical stimulus modulate ANS. Therefore, evaluation of the impact of anesthetics on ANS is important to determine subsequent compensatory responses of the cardiovascular system. Among the tests to assess ANS function are the measurement of heart rate variations during Valsalva maneuver, heart rate responses to postural changes, deep breathing, and pharmacological intervention, and blood pressure responses to postural changes or to sustained handgrip. These measurement cannot be clinically practical during anesthesia and surgery to monitor ANS activity.
KeywordsPower Spectrum Autonomic Nervous System Heart Rate Response Respiratory Sinus Arrhythmia Power Spectral Analysis
Unable to display preview. Download preview PDF.
- 2).Akselrod S, Gordon D, Madwed JB, Snidman NC, Shannon DC, Cohen RJ: Hemodynamic regulation: investigation by spectral analysis. Am J Physiol 249:H867 – H875, 1985Google Scholar
- 3).Poemranz, Macaulay RJB, Caudill MA, Kutz I, Adam D, Gordon D, Kilborn KM, Barger AC, Shannon DC, Cohen RJ, Beson H: Assessment of autonomic function in humans by heart rate spectral analysis. Am J Physiol 248:H151-H153, 1985Google Scholar