Development & Anomalies of

Vein System

By Zifan Mohamed

TO Prof.

Igor V. Zadnipryany

Aim To learn thedevelopment and Anomalies of vein system system

DEVELOPMENT OF VEINS

Heart-First organ to start functioning & the 1st organ to fully develop in the fetus.

A- 21 days -heart tube forms

B- 23 days-heart beats

C- 4Week cardiac loop forms

D- 7 Week heart fully developed

Bulbus cordis

Ventricle

Atrium

Sinus venosus

Truncus arteriosus

Consus

Ventricle

Atrio Ventricular canal

Atrium

Sinus Venosus

Right common Cardinal vein forms superior vena cavaUmblical Vein(disappears)

Right viteline vein forms part of inferior vena cava

Left horn of sinus venosus retrogresses to form part of coronary sinus

AtriumBody of Sinus Venosus

Right hornRight horn

Common cardinal veinUmblical VeinVitelline Vein

1.The vitel line veins (omphalomesenteric veins)

2.The umbilical veins

3.The cardinal veins

In The Fifth Week, Three Pairs Of Major Veins Can Be Distinguished

DEVELOPMENT OF INFERIOR VENACAVA

B. Vitel line and umblical vein broken in to numerous channel

C. Formation of Hepato cardiac channel

D. Formation of Common hepatic vein & Ductus venosus

ANOMALIES OF THE VENOUS SYSTEM

•Anomalies of the Superior Vena Cava

•Anomalies of the Coronary Sinus

•Anomalies of the Inferior Vena Cava

•Anomalies of the Ductus Venosus

Click the arrow to continue

ANOMALIES OF THE SUPERIOR VENA

BILATERAL SUPERIOR VENAE CAVA WITH NORMAL DRAINAGE TO THE RIGHT ATRIUM

• The size of the Left Superior Vena Cava varies

LEFT ATRIAL OR BI ATRIAL DRAINAGE OF RIGHT SVC

• It results from the deficiency of the

common wall between the Superior Vena

Cava & Right Upper Pulmonary Vein

CORONARY SINUS DEFECT & UNROOFED CS

• Unroofed coronary sinus almost always is associated with a persistent LSVC

• A Cronary sinus defect without an associated LSVC, and the physiology is the same as in ASD

ANOMALIES OF THE CORONARY SINUS

CORONARY SINUS ORIFICE ATRESIA

• The Cronary Sinus is usually well formed, the orifice is covered by a

thin membrane like tissue

CORONARY SINUS ANEURYSM OR DIVERTICULUM

• It is a pouch with its neck originating in the CronarySinus proximal

to the entrance of the middle cardiac vein. The pouch, 2 to 5 cm in

diameter, extends into the LV wall.

INTERRUPTED INFERIOR VENA CAVA

•Absence of the hepatic segment of the IVC with azygos

continuation into the right or left

• Rarely the infra hepatic segment of the IVC may continue to

both right and left SVC via bilateral azygos veins

ANOMALIES OF THE INFERIOR VENA CAVA

BILATERAL INFERIOR VENAE CAVAE

• Bilateral supra hepatic a frequent finding in

cases of visceral heterotaxy with asplenia

• Bilateral supra hepatic IVCs also can occur

rarely in patients with normal visceral situs

ANOMALOUS TERMINATION OF THE UMBILICAL VEINS AND ABSENT DUCTUS

VENOSUS•Persisted left umbulical

vein terminates directly

into the CS , to the CS by

way of the left portal

vein or into the iliac vein

ANOMALIES OF THE DUCTUS VENOSUS

PATIENTS WHO UNDERWENT CARDIAC SURGERY FOR CONGENITAL HEART DISEASES

THE END……