overriding aorta

Introduction

One of the 4 features of tetralogy of Fallot.

Pathology

• aorta is positioned directly over a ventricular septal defect, instead of over the left ventricle
• aorta receives some blood from the right ventricle, reducing arterial oxygenation

More general terms

• congenital heart disease; congenital cyanotic heart disease

Additional terms

• tetralogy of Fallot