EXAMINATION: LEFT CAROTID DUPLEX DOPPLER U/S, 01/01/01 Thepatient had a prior left carotid endarterectomy in September 1900. Scanning was limited to the left carotid system.  LEFT CAROTID VELOCITIES (cm/sec)  sys dia DISTAL ICA 68.8 35.9 MID ICA 70.7 36.9 PROXIMAL ICA 75.7 27.9 ECA 165 40 BULB/BIFUR -- -- DISTAL CCA 83.7 29.9 MID CCA 87.7 32.9 PROXIMAL CCA 78.0 30.0 ICA/CCA SYS VEL RATIO: 0.9 ICA/CCA DIA VEL RATIO: 1.1 VERTEBRAL SYS VEL: 49.7 ?CEPHALAD: yes Evaluation of the left carotid artery and branches reveals normal systolic and diastolic velocities and ratios. Direct visualization reveals no evidence of residual plaque. The Ultrasound Imaging Services of this facility are accredited for Obstetrical and General Ultrasound Services by the American College of Radiology.       IMPRESSION: Status post left carotid endarterectomy. No evidence of residual plaque or stenosis. Normal velocities and ratios are identified. END OF IMPRESSION: