This single-centre retrospective study examined cerebral oxygenation across EEG patterns after cardiac arrest, including 109 patients monitored with jugular bulb oxygen saturation and 33 with brain tissue oxygen tension. Burst-suppression with identical bursts was associated with higher jugular saturation than non-malignant patterns (β=12; 95% CI, 7.0 to 16.0). Compared with malignant patterns, it was associated with lower intracranial pressure (β=-19.0; 95% CI, -32.5 to -5.6). Brain tissue oxygen tension was numerically higher than with malignant patterns, but the adjusted estimate was uncertain (β=4.0; 95% CI, -4.7 to 13.0).
These physiological associations suggest a potentially distinct pattern of post-arrest brain injury. They do not establish a modifiable mechanism or demonstrate implications for neurological recovery.
Study limitation: Single-centre retrospective data from selected monitored patients, including only 33 with brain tissue oxygen monitoring, limit causal interpretation and generalisability.
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