Gonzales et al. 21 found 12 valid cases of subclavian-steal syndrome and 3 cases of vertebral-artery abnormality in 220 patients undergoing aortic-arch angiography.

Colleague Samantha Grimsley ’15 (diagnostic medical sonography), a vascular sonographer at Harvard Vanguard Medical Associates, taught a third class on subclavian steal syndrome, a condition in which ...