1996 Volume 9 Issue 3 Pages 80-84
We studied TCD findings in six patients with occlusion of the internal carotid artery (ICA), including two with bilateral ICA occlusion. Their ages ranged from 60 to 70 yr with mean of 64 yr. All patients had superficial temporal artery-middle cerebral artery (STA-MCA) bypass. Mean flow velocity (MFV) and pulsatility index (PI) in the middle cerebral artery (MCA), anterior cerebral artery (ACA) and STA were measured pre-and postoperatively. Two of three patients demonstrated a decrease of MFV and a slight increase of PI in the MCA postoperatively. All three showed decreased MFV in the ACA after surgery. Five patients demonstrated a significant increase of MFV and a decrease of PI in the STA after the procedure.
These results indicate that TCD is clinically useful for assessing hemodynamic changes induced by bypass surgery.
