Management of Brainstem Herniation Leading to Cardiac Arrest

Initial Resuscitation Approach

• The American Heart Association recommends beginning high-quality CPR immediately with minimal interruptions to maintain cerebral and coronary perfusion 1
• The American Heart Association suggests applying defibrillator/AED as soon as possible to identify and treat shockable rhythms if present 1
• The American Heart Association recommends establishing advanced airway (endotracheal tube or supraglottic airway) with confirmation using waveform capnography 1
• The American Heart Association recommends providing 8-10 breaths per minute with continuous chest compressions after advanced airway placement 1
• The American Heart Association suggests rotating compressors every 2 minutes to maintain effective compressions 2

Addressing Brain Herniation

• The Brain Injury Foundation recommends elevating the head of bed to 30° if tolerated to reduce cerebral edema 1
• The World Journal of Emergency Surgery suggests administering osmotherapy (mannitol or hypertonic saline) immediately for impending cerebral herniation 3
• The American Heart Association recommends considering temporary hyperventilation (PaCO2 30-35 mmHg) only as a rescue therapy for acute herniation signs (dilated pupils, bradycardia, hypertension) 4
• The World Journal of Emergency Surgery recommends maintaining arterial oxygen saturation between 94-98% to avoid both hypoxia and hyperoxia 3

Hemodynamic Management

• The World Journal of Emergency Surgery recommends maintaining mean arterial pressure (MAP) > 80 mmHg or systolic blood pressure > 100 mmHg to ensure adequate cerebral perfusion 3
• The American Heart Association suggests administering vasopressors (norepinephrine preferred) if needed to maintain blood pressure targets 4
• The World Journal of Emergency Surgery recommends ensuring adequate intravascular volume while avoiding excessive fluid administration that could worsen cerebral edema 3
• The World Journal of Emergency Surgery recommends maintaining hemoglobin > 7 g/dL (higher threshold may be considered in elderly or patients with limited cardiovascular reserve) 3

Neurosurgical Interventions

• The American Heart Association recommends obtaining urgent neuroimaging (CT scan) to evaluate the cause and extent of brain herniation 1
• The Journal of Neurointerventional Surgery suggests considering immediate neurosurgical consultation for potential life-saving interventions 5
• The Journal of Neurointerventional Surgery recommends performing suboccipital decompressive craniectomy emergently for cerebellar infarction or hemorrhage causing herniation 5
• The Journal of Neurointerventional Surgery suggests considering external ventricular drainage placement for hydrocephalus, but not as the sole intervention due to risk of upward herniation 5

Post-ROSC Management

• The American Heart Association recommends implementing targeted temperature management (32-34°C) for 24 hours in comatose survivors after return of spontaneous circulation 1
• The World Journal of Emergency Surgery recommends monitoring intracranial pressure if patient remains comatose after resuscitation 3
• The World Journal of Emergency Surgery recommends maintaining cerebral perfusion pressure > 60 mmHg 3
• The American Heart Association suggests avoiding hyperthermia as it worsens neurological outcomes 4
• The American Heart Association recommends treating seizures aggressively with appropriate anticonvulsants 4

Monitoring and Prevention of Secondary Injury

• The American Heart Association recommends monitoring for signs of increased intracranial pressure (pupillary changes, Cushing's triad) 1
• The American Heart Association suggests maintaining normoglycemia (avoid both hyperglycemia and hypoglycemia) 1
• The World Journal of Emergency Surgery recommends correcting coagulopathy: maintaining platelet count > 50,000/mm³ and PT/aPTT < 1.5 times normal 3
• The World Journal of Emergency Surgery suggests considering ICP monitoring after coagulopathy correction in salvageable patients 3
• The American Heart Association recommends avoiding early prognostication as it may be unreliable, especially if the patient has been treated with therapeutic hypothermia 1

Special Considerations

• The British Journal of Anaesthesia recommends a period of physiological stabilization and observation for patients with devastating brain injury to improve decision-making quality 6
• The British Journal of Anaesthesia suggests communicating with family clearly about the goals of care, explaining that admission to ICU is to allow time for accurate prognostication 6
• The British Journal of Anaesthesia recommends considering organ donation as a routine part of end-of-life care planning when appropriate 6
• The American Heart Association suggests implementing a comprehensive, structured treatment protocol which may improve survival after cardiac arrest 2

Pitfalls to Avoid

• The American Heart Association recommends not delaying CPR or herniation management while waiting for neuroimaging 1
• The Journal of Neurointerventional Surgery recommends not placing an external ventricular drain without addressing mass effect on the brainstem in posterior fossa lesions 5
• The Journal of Neurointerventional Surgery suggests not delaying neurosurgical intervention in patients with posterior fossa mass effect, as 85% of patients progressing to coma die without intervention 5