Cerebral vasoreactivity with breath holding test in Transcranial Doppler and functional MRI in patients with carotid stenosis

Abstract

Background: Impaired cerebral vasoreactivity (CVR) on Transcranial Doppler (TCD) with breath holding test (BHT) is predictive of stroke in patients with carotid stenosis. Functional MRI (fMRI) through BOLD-signal change can also /INS;evaluate the hemodynamic response, with the advantage of imaging resolution. Few studies have shown a good correlation between these methods, but none of them used BHT.