Retroaortic Innominate Vein

Panel A: (6th week of gestation). 1 & 2 - Right and Left anterior cardinal veins, 3 - Primitive aorta, 4 & 5 - Superior and Inferior transverse venous plexus, 6 - Right & Left common cardinal veins, 7 & 8 - Right and left posterior cardinal veins, 9 - Sinus venosus, 10 - Vitelline vein, 11 - Umbilical vein, 12 - Developing IVC

Konstantinov I. E. et al.; Ann Thorac Surg 2003;75:1014-1016

Anatomy: Shone's Complex

Shone's Complex:

1) Supravalvar Mitral Ring

2) Parachute Mitral Valve

3) Subaortic Stenosis

4) Coarctation of Aorta

Images below are from: Shone, JD., Sellers, RD., Anderson, RC., Adams, P., Lillehei, CW., Edwards, J. The developmental complex of "parachute mitral valve", supravalvar mitral ring of left atrium, subaortic stenosis and coarctation of aorta. Am J Cardiol 1963;11:714. Extensive report of 8 cases with clinical, pathologic and EKG information.

Supravalvar Mitral Ring

Parachute Mitral Valve (Partial type)

Parachute Mitral Valve

Subaortic Stenosis

Coarctation of aorta