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Patent Ductus Arteriosus

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Diagnosis of Patent Ductus Arteriosus

Patent Ductus Arteriosus (PDA) is usually discovered early in life. Sometimes, a very small PDA may go unnoticed. They may be discovered during a routine doctor’s examination.

An infant or an adult may present with heart failure or lung infections due to moderate or large shunting of blood through the patent ductus arteriosus.

Apart from the symptoms of heart failure, there can be other signs that can be indicative of left ventricular volume overload and increased blood flow to the lungs. They are -

Bullet Hepatomegaly or liver enlargement.

Bullet Murmur (Machinery murmur) on auscultation.

Link - Listen to/Download

Bullet Bounding peripheral pulses.

Bullet Upper left sternal border thrill – Vibration felt when a hand is placed on the patient’s chest at the upper left border.

Diagnostic testing can be done to reveal or confirm the presence of a patent ductus arteriosus.

Laboratory testing to analyze blood gas can be useful to determine the accurate oxygen saturation in blood. Increased presence of carbon dioxide or very low oxygen levels in blood can be determined.

An electrocardiogram may reveal enlargement and hypertrophy of the left ventricle when a significant amount of blood shunts through the ductus. In small PDAs, ECG is characteristically normal.

A Chest X-Ray is also normal when the shunt is very small. In larger shunts, there are prominent markings of left sided heart chambers, showing volume overload in the left side. Pulmonary arteries enlargement can also be seen.

An echocardiogram, other wise called as ECHO, can establish the diagnosis of PDA. A color echo and Doppler study can show the presence of a shunt between the aorta and the pulmonary artery. Associated cardiac defects, if any present, may be diagnosed.

A cardiac catheterization may not be necessary for all patients with PDA. This test is usually recommended for patients who are suspected of having high resistance of blood flow to the lungs or high pulmonary vascular resistance. When performed, it can reveal the amount of blood shunting through the ductus. Pressure inside each of the heart chamber can be assessed. Pulmonary hypertension can be diagnosed. Other congenital cardiac defects, if present, can be diagnosed and assessed.


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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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