[HST]: left arm and leg numbness  [SAS]: left arm and leg numbness     Extracranial Carotid Doppler ultrasound.   History: 71 year old.     Comparison: none.   RIGHT SIDE:   THE MAXIMUM PEAK SYSTOLIC VELOCITY IN THE INTERNAL CAROTID ARTERY IS  135 CM PER SECOND CORRESPONDING TO 50-69 percent STENOSIS RANGE.  THE  REMAINING VELOCITY VALUES IN THE INTERNAL CAROTID ARTERY ARE BELOW  THIS LEVEL AND DOCUMENTED ON SCANNED "CAROTID ARTERY DOPPLER WORK  SHEET".   Right ICA/CCA Ratio = 2.3   The peak systolic velocity within the external/common carotid  arteries = 126 CM/second.   LEFT SIDE:   THE MAXIMUM PEAK SYSTOLIC VELOCITY IN THE INTERNAL CAROTID ARTERY IS  113 CM PER SECOND CORRESPONDING TO 0-50% STENOSIS RANGE.  THE  REMAINING VELOCITY VALUES IN THE INTERNAL CAROTID ARTERY ARE BELOW  THIS LEVEL AND DOCUMENTED ON SCANNED "CAROTID ARTERY DOPPLER WORK  SHEET".   Left ICA/CCA Ratio = 1.4   The peak systolic velocity within the external/common carotid  arteries = 127 CM/second.   Both vertebral arteries demonstrate antegrade flow.   Plaque is present , bilaterally left greater than right with  scattered focal calcification.       IMPRESSION: EXTRACRANIAL CAROTID DOPPLER ULTRASOUND: 1.  Right internal carotid artery at the midportion demonstrates  50-69% stenosis range velocities.   2.  Mild, bilateral plaque left greater than right.     ______________________________________    Signed by:AAAAAA B CCCCC, MD Date: 01/01/1901 Time:15:35