vein system
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Development & Anomalies of
Vein System
By Zifan Mohamed
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TO Prof.
Igor V. Zadnipryany
Aim To learn thedevelopment and Anomalies of vein system system
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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
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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
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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
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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
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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
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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
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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
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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
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CORONARY SINUS ORIFICE ATRESIA
• The Cronary Sinus is usually well formed, the orifice is covered by a
thin membrane like tissue
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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.
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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
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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
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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
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PATIENTS WHO UNDERWENT CARDIAC SURGERY FOR CONGENITAL HEART DISEASES
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THE END……