Cerebral hemodynamics during spinal cord stimulation.
An increase of cerebral blood flow (CBF) during spinal cord stimulation (SCS) has been shown in man using the 133Xenon inhalation technique. We report the effects of SCS on cerebral hemodynamics studied with transcranial Doppler sonography (TCD). Twenty-six patients with epidural electrodes implanted at the cervical level (11 patients) and at the thoracic level (15 patients) were investigated with recordings of CBF velocity in the middle cerebral arteries before and during SCS. Sixty-three and two-thirds percent of patients with cervical stimulation and 29.4% of patients with thoracic stimulation showed a decrease of cerebral vascular resistance simultaneously with an increase of the velocity of CBF.
Meglio
M
M
Instituto di Neurochirurgia, Universita Cattolica, Rome, Italy.
Cioni
B
B
Visocchi
M
M
D001783:Blood Flow Velocity; D002536:Cerebral Arteries / Q000000981:diagnostic imaging* / Q000502:physiology; D002560:Cerebrovascular Circulation / Q000502:physiology*; D004599:Electric Stimulation Therapy / Q000295:instrumentation; D004567:Electrodes, Implanted; D006801:Humans; D013116:Spinal Cord / Q000502:physiology*; D014463:Ultrasonography; D014655:Vascular Resistance