Ultrasound and the Subclavian Steal Syndrome

Abstract

Ultrasound tracings were correlated with the electrocardiogram on an oscilloscope recorded by Polaroid photographs in 4 patients. Each had angiographic proof of subclavian steal. Measurements were recorded between the peak of the QRS complex and the foot of the pulse wave upswing. The patients showed a pulse delay of 0.03 to 0.06 second; normal controls a delay of 0.00 to 0.01 second.