Prenatal diagnosis of aorto-left ventricular tunnel: introducing the ‘cockade sign’

Abstract

A foetal echocardiography was solicited in the 35th week of gestation for left ventricular (LV) hypertrophy and dilatation. It demonstrated a significant backflow from ascending aorta to the LV. Regurgitant flow was not generated through the aortic valve, but through a tunnel surrounding the aortic annulus ( Panel A ). This ‘cockade sign’—seen as a double …