Table 1. Changes in Hemodynamic and Cerebrovascular Parameters during Transient (10 s) Electrocerebral Silence (n = 7)

Significant differences: between intracarotid and intravenous groups;

† from baseline;

‡ 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 (mm Hg/%-Δ LDC); relative CVRI = cerebrovascular resistance (mm Hg/%-Δ LDI) ipsilateral to carotid cannulation.