Table 2. Changes in Hemodynamic and Cerebrovascular Parameters during Sustained (1 h) Electrocerebral Silence

Significant differences:

* between intracarotid and intravenous groups;

† from baseline;

‡ from burst suppression;

§ from recovery.

Absolute CVRC = cerebrovascular resistance (mmHg/laser Doppler blood flow value) contralateral to carotid cannulation; absolute CVRI = cerebrovascular resistance (mmHg/laser Doppler blood flow value) ipsilateral to carotid cannulation; ETco²= end-tidal carbon dioxide concentration; %-Δ LDC = percentage change of laser Doppler blood flow values from baseline in contralateral to carotid cannulation; %-Δ LDI = percentage change of laser Doppler blood flow values from baseline in ipsilateral to carotid cannulation; MAP = mean arterial pressure; relative CVRC = cerebrovascular resistance contralateral to carotid cannulation (mmHg/%-Δ LDC); relative CVRI = cerebrovascular resistance (mmHg/%-Δ LDI) ipsilateral to carotid cannulation.