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Patent Ductus Arteriosus

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About Patent Ductus Arteriosus

Patent Ductus arteriosus is the second commonest congenital birth defect of the heart and can cause heart failure; however majority of these defect close spontaneously after birth.


Patent Ductus Arteriosus is a congenital (present from birth) heart defect in which a fetal passageway between the pulmonary artery and the aorta remains open, causing excess blood flow to the lungs.

In the fetus the 'ductus arteriosus' is a normal structure between two major blood vessels and about 60% of the total cardiac output is contributed by the ductus throughout the fetal life. After birth the ductus closes within 24 to 48 hours. Normally the pulmonary artery will carry blood to the lungs. In a fetus, the lungs are not functional. Ductus arteriosus acts like a shunt between pulmonary artery and aorta to prevent overloading of lungs with blood when the lungs are not functional.

At birth, there are several hormonal and chemical changes. Breathing increases the oxygen availability for the infant. These factors produce certain muscle contractions and cause the ductus to close completely in a few weeks.

Majority of patent ductus arteriosus - 88% closes itself within 8 weeks of birth. Persistent PDA occurs in about 1 in 2000 to3000 infants. In the United States about 3000 babies are born with PDA each year.

The incidence of this anomaly is twice in females than in males. After Ventricular septal defect the Patent Ductus Arteriosus is the commonest congenital heart defect in children and accunts for approximately 10% of all cases of congenital heart disease in childhood.

Babies born prematurely or having respiratory distress syndrome are at a higher risk for having a patent ductus arteriosus. About 30% of infants with a low birth weight develop a patent ductus arteriosus. Other contributing factors can be hypoxia, livging at high altitudes, maternal rubella, inheritance, and associated cardiac abnormalities.

Symptoms depend on the size of the PDA and the amount of blood flowing into lungs. Infants with small patent ductus may have no symptoms, while large ductus can result in heart failure.

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All PDAs need treatment and closure to prevent endocarditis, heart failure and pulmonary hypertension that can occur later in life. PDA closure can be done by open cardiac surgery or through a cardiac catheterization route without surgical intervention.


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What are some therapy options for improving a hoarse, high pitched voice as a result of Left Vocal Cord Paralysis.
speechpath Saturday, February 9, 2013
My son is 6 years had an operation of PDA he is fine,eats well though still thin but strong and active.its now 3month
victor6 Thursday, January 31, 2013
Without treatments, Disease Patent Ductus Arteriosus[PDA] may progress from left-to-right(acyanotic heart) shunt to right-to-left shunt(cyanotic heart) called Eisenmenger syndrome, which has a grave outcome.
tjavailable Friday, January 28, 2011
Pls clarify why did the PDA problem occurs for the child?
What are all reasons for PDA Problem?

My Baby had at three months baby, cardiologist surgery and clear that problem..But I have one doubt in future anyother problem occurs for child...pls reply me as soon as possible.....

Kavivarshini Tuesday, November 10, 2009
What the reasons for PDA Problem occurs to child?

Kavivarshini Saturday, November 7, 2009
My daughter had this PDA problem in 3months baby. then cardiologist surgery for my baby. She is well. now she is 1 1/2 years old...I know in future anyother problem occurs for my daughter.
Kavivarshini Saturday, November 7, 2009
I would like to know the same thing. My daughter has a pda and doesn't eat. Tube fed. How is the success rate with eating after her pda is fixed?
ProudMother Thursday, July 16, 2009
Regarding PDA - cardiac catheterization route - could you please let me know the risk factor and sucess rate.


SureshViswanathan Friday, January 30, 2009
My name is Tracey, I am 44 years old, and at age 6 I had a PDA closure with no complications. I have led a healthy and happy life. I am married and have three beautiful children.
soccermom7 Sunday, March 20, 2011

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