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Second-impact syndrome

R C Cantu1

  • 1Neurosurgery Service, Emerson Hospital, Concord, Massachusetts, USA.

Clinics in Sports Medicine
|February 26, 1998
PubMed
Summary

Second impact syndrome (SIS) is a dangerous condition where a second head injury occurs before the first concussion has healed. Athletes experiencing any post-concussion symptoms must not return to play to prevent this potentially fatal outcome.

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Area of Science:

  • Sports Medicine
  • Neurology
  • Traumatic Brain Injury

Background:

  • Second impact syndrome (SIS) is a rare but catastrophic injury.
  • It occurs when an athlete sustains a second head injury before fully recovering from an initial concussion.

Observation:

  • SIS can happen in any sport involving head impacts, not just football.
  • The critical factor is the timing of the second impact relative to the resolution of the first injury's symptoms.

Findings:

  • Athletes experiencing persistent post-concussion symptoms are at high risk.
  • Immediate cessation of play is crucial for any athlete with ongoing symptoms after a head injury.

Implications:

  • Emphasizes the critical need for strict return-to-play protocols in sports.
  • Highlights the potential for severe, rapid neurological deterioration following consecutive head traumas.
  • Underscores the importance of recognizing and managing concussion symptoms effectively to prevent catastrophic outcomes.

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