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The autonomic disturbance accompanying myocardial infarction

  • F. Lombardi
  • G. Sandrone
  • R. Sala
  • S. Cerutti
  • A. Malliani

Abstract

To evalauate the alteration of sympatho-vagal balance after myocardial infarction we compared the spectral components of heart variability of 70 patients at 2 weeks, 6 and 12 months after myocardial infarction with 26 age matched control subjects. Spectral analysis of heart rate variability was characterized in control subjects by two major components at low (LF, ∼0.10 Hz) and high (HF, ∼0.25 Hz) frequency. According to several clinical and experimental observations they can be considered appropriate indices of, respectively sympathetic and vagal neural activities directed to the heart and their ratio an indirect measure of sympatho-vagal balance. In patients at 2 weeks after myocardial infarction there was a significant increase in LF (69±2 versus 53±3 nu) and LF/HF ratio (8±1.1 versus 2±0.3) as well as a diminished HF (17±1 versus 35±3 nu) thus indicating an increased sympathetic and a reduced parasympathetic tone. At 6 and 12 months after myocardial infarction we observed a progressive reduction of LF and LF/HF ratio as well as an increase in HF which suggested a normalization of sympatho-vagal interaction.

Keywords

Myocardial Infarction Heart Rate Variability Acute Myocardial Infarction Parasympathetic Tone Inferior Myocardial Infarction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • F. Lombardi
    • 1
    • 2
  • G. Sandrone
    • 1
    • 2
  • R. Sala
    • 1
    • 2
  • S. Cerutti
    • 1
    • 2
  • A. Malliani
    • 1
    • 2
  1. 1.Instituto Ricerche CardiovascolariCNRMilanoItaly
  2. 2.Patologia Medica, Centro “Fidia”, Ospedale “L. Sacco”Università di MilanoMilanoItaly

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