Cerebral blood flow velocities and trigeminal ganglion stimulation. A transcranial Doppler study.
Transcranial Doppler sonography (TCD) patterns of middle cerebral arteries (MCA) were recorded in 10 patients before and during unilateral trigeminal ganglion stimulation (TGS). During TGS, TCD flow velocity significantly decreases in all patients: on both sides in 2 patients, only ipsilaterally to the TGS in 7 patients, and only on the opposite side in the remaining patient. In 2 patients, a controlled progressive hypercapnia test was performed before and during TGS. An enhanced vascular response to increased CO2 concentrations was observed during TGS.
Visocchi
M
M
Istituto di Neurochirurgia, Università Cattolica, Roma, Italia.
Chiappini
F
F
Cioni
B
B
Meglio
M
M
D001783:Blood Flow Velocity; D001921:Brain / Q000098:blood supply*; D002245:Carbon Dioxide / Q000097:blood; D002536:Cerebral Arteries / Q000000981:diagnostic imaging / Q000503:physiopathology; D002560:Cerebrovascular Circulation; D004558:Electric Stimulation; D005157:Facial Pain / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D007839:Functional Laterality; D006566:Herpesviridae Infections / Q000503:physiopathology; D006801:Humans; D009103:Multiple Sclerosis / Q000503:physiopathology; D010149:Postoperative Pain; D012044:Regression Analysis; D012668:Trigeminal Ganglion / Q000503:physiopathology*; D017585:Ultrasonography, Doppler, Transcranial
D002245:Carbon Dioxide