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Congenital Heart Defects: Tricuspid Valve Atresia

Tricuspid Valve Atresia consists of the following abnormalities:

The Tricuspid Valve did not develop so the blood cannot get to the Right Ventricle and that ventricle in turn also is severely underdeveloped.

Usually only a small part of the Right Ventricle is developed and is supplied with blood through a hole from the Left Ventricle called a Ventricular Septal Defect (VSD).

A hole between the two atriums called a Atrial Septal Defect (ASD) is essential for the blue blood coming back from the body to get into the heart to circulate.

The blood which is coming back to the Right Atrium has nowhere to go other than to go through the Atrial Septal Defect. When it gets through the ASD it mixes with the pink blood coming back from the lungs into the Left Atrium.

The Pulmonary Artery and Valve are also severely underdeveloped. Since the Right Ventricle did not develop normally the artery coming out of it and its branches do not develop normally.


Ductus Arteriosus
The Ductus Arteriosus is a little artery-like structure which has muscles in its walls located between the main Pulmonary Artery and the Aorta and is usually present in all babies before birth.

When a baby is exposed to oxygen the Ductus closes on its own. It's okay for the Ductus to close in a baby with a normal heart, but for a baby with Tricuspid Atresia this will almost be fatal to the baby, so doctors try to keep the Ductous open until surgery can be performed.

Babies born with Tricuspid Valve Atresia are usually very blue at birth. Even when doctors give them oxygen they continue to be very deeply blue. The only way to get some blood to their lungs is to start them on a medicine called Prostaglandin which is administered through an intravenous pump. This will keep the Ductous Arteriosus open until surgery can be performed.

Problems with the Walls:
Atrial Septal Defect (ASD) : Fix | Ventricular Septal Defect (VSD) : Fix

Problems with the Doors:
Tricuspid Valve Atresia : Fix 1 | Fix 2 | Fix 3 | Ebstein's Anomaly
Hypoplastic Left Heart Syndrome : Fix 1 | Fix 2 | Fix 3
Pulmonary Valve Stenosis
| Aortic Valve Stenosis

Problems with the Chambers:
Hypoplastic Right Ventricle

Problems with the Hallways:
Coarctation of the Aorta : Fix | Branch Pulmonary Artery Stenosis
Transposition of the Great Arteries : Fixed
Total Anomalous Pulmonary Venous Connection

Problems with the Plumbing:
Anomalous Origin of the Coronary Arteries from the Pulmonary Artery

Problems Involving More Than One Part of the Heart:
Tetralogy of Fallot : Fixed
Truncus Arteriosus : Fixed | Common Atrioventricular Canal : Fix 1 | Fix 2

Ductus Arteriosus : Fix 1 | Fix 2

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Next you will learn how doctors fix the Tricuspid Valve Atresia defect in a three-stage process starting with a shunt.

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