Transient suppression of heart rate complexity in concussed athletes

Michael F. La Fountaine, Kevin S. Heffernan, James D. Gossett, William A. Bauman, Ronald E. De Meersman

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


Heart rate variability (HRV) and complexity (HRC) were calculated at rest and during an isometric hand grip test (IHGT) within 48-hours (48 h) and two weeks (Week Two) of a concussion in athletes (CG) and control subjects. No differences were present at rest or in HRV during IGHT. HRC was significantly lower in the CG compared to controls at 48 h during IHGT. In CG at Week Two during IHGT, HRC was significantly greater than 48 h observations and not significantly different than controls. The findings suggest that HRC may have utility in detecting efferent cardiac autonomic anomalies within two weeks of concussion.

Original languageEnglish (US)
Pages (from-to)101-103
Number of pages3
JournalAutonomic Neuroscience: Basic and Clinical
Issue number1-2
StatePublished - Jun 15 2009
Externally publishedYes


  • Approximate entropy
  • Autonomic nervous system
  • Concussion
  • Heart rate complexity
  • Mild traumatic brain injury

ASJC Scopus subject areas

  • Endocrine and Autonomic Systems
  • Clinical Neurology
  • Cellular and Molecular Neuroscience


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