[Subarachnoid Hemorrhage and Isolated Brainstem Death].

Area of Science:

• Neurology
• Neuroscience
• Critical Care Medicine

Background:

• Brain death determination varies globally.
• German guidelines mandate irreversible loss of all brain functions (cerebrum, cerebellum, brainstem).
• New recommendations for brain death diagnosis are discussed based on a case report.

Observation:

• A 41-year-old patient with subarachnoid hemorrhage and a posterior inferior cerebellar artery aneurysm presented with coma and apnea.
• Initial assessment showed absent brainstem reflexes.
• Electroencephalography (EEG) on day 3 revealed residual cortical activity (alpha activity).

Findings:

• The patient was initially diagnosed with isolated brainstem death.
• The presence of residual cortical activity on EEG complicated the diagnosis.
• Brain death was confirmed the following day after an isoelectric EEG.

Implications:

• Isolated brainstem death alone is insufficient for confirming death in Germany.
• Primary infratentorial brain damage requires supplementary confirmatory tests for brain death diagnosis.
• This case underscores the importance of comprehensive neurological assessments and adherence to specific diagnostic criteria.