Hypotensive brain stem necrosis or cardiac arrest encephalopathy?

Area of Science:

• Neurology
• Pathology
• Critical Care Medicine

Background:

• Selective symmetrical necroses in brain stem nuclei were previously termed hypotensive brain stem necrosis.
• These lesions affect critical areas including motor cranial nerve nuclei and colliculi.

Purpose of the Study:

• To investigate the etiology of selective symmetrical brain stem necroses.
• To determine if hypotensive brain stem necrosis is accurately named and to propose a more appropriate term.

Main Methods:

• Reviewed clinical records of eight infants and seven adults with selective brain stem lesions.
• Examined the association between these lesions and documented episodes of cardiac arrest.
• Conducted a literature review on brain stem necrosis and cardiac arrest.

Main Results:

• All studied patients experienced cardiac arrest, with resuscitation varying in duration.
• Patients remained in a decerebrate state post-resuscitation until death.
• The observed lesions were found to be specifically related to cardiac arrest events.

Conclusions:

• The term "hypotensive brain stem necrosis" is considered a misnomer.
• The condition should be renamed "cardiac arrest encephalopathy" to accurately reflect its cause.
• This neuropathological finding is a direct consequence of cardiac arrest.