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Radial Artery Mapping for Coronary Artery Bypass Graft Placement1

Peter Zimmerman, MD, Eva Chin, MD, Sherelle Laifer-Narin, MD, Nagesh Ragavendra, MD and Edward G. Grant, MD

1 From the Department of Radiology, West Los Angeles Veterans Administration Medical Center, 11301 Wilshire Blvd, Los Angeles, CA 90073 (P.Z., E.C., E.G.G.); and Department of Radiological Sciences, UCLA Medical Center, Los Angeles, Calif (P.Z., E.C., S.L.N., N.R., E.G.G.). Received November 6, 2000; revision requested December 23; revision received March 19, 2001; accepted March 22. Address correspondence to P.Z. (e-mail: peterzimmerman@earthlink.net).



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  		Figure 1. Drawings of a complete (left) and incomplete (right) superficial palmar arch (SPA) of the left hand. Asterisks indicate the superficial palmar branch of the radial artery (RA) coursing to form the superficial palmar arch. UA = ulnar artery.

 


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  		Figure 2. Transducer positioning for insonation of the superficial palmar branch of the radial artery in the crease at the base of the thumb.

 


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  		Figure 3a. Color (inset box) and spectral Doppler US images of the superficial palmar branch of the radial artery (red area in inset box) in a healthy volunteer demonstrate blood flow toward the transducer before radial artery compression (left of arrow). (a) In one hand, flow reverses after radial artery compression (right of arrow), indicating a continuous palmar arch. (b) In the contralateral hand, flow does not reverse after radial artery compression (right of arrow), indicating an incomplete arch.

 


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  		Figure 3b. Color (inset box) and spectral Doppler US images of the superficial palmar branch of the radial artery (red area in inset box) in a healthy volunteer demonstrate blood flow toward the transducer before radial artery compression (left of arrow). (a) In one hand, flow reverses after radial artery compression (right of arrow), indicating a continuous palmar arch. (b) In the contralateral hand, flow does not reverse after radial artery compression (right of arrow), indicating an incomplete arch.

 




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