Ultrasound of the median arcuate ligament syndrome: a new approach to diagnosis.

Abstract

The combination of a maximum expiratory PV of over 350 cm/s and a DA higher than 50° seems to be a most reliable indicator for MALS in this small series of patients. Based on these data we propose that functional ultrasound should be the first line in screening for MALS. However, a clear pathophysiological definition of MALS remains still obscure.