Patent ductus arteriosus is a heart condition present at birth where a normal fetal vessel stays open after delivery. It is most often found in newborns and premature babies, and can be noticed in later infancy if small. People with patent ductus arteriosus may have a heart murmur and fast breathing, and some have poor feeding or slow weight gain. Small openings may cause no symptoms and can close on their own, but larger ones can strain the heart and lungs over time. Treatment often includes watchful waiting, medicines like ibuprofen or indomethacin in premature infants, a catheter-based closure, or surgery, and survival is excellent with timely care.
Overview
Patent ductus arteriosusSymptoms
Patent ductus arteriosus often has no signs if small. Larger openings can cause a heart murmur, fast breathing, sweating or tiredness with feeds, poor weight gain, frequent colds, and strong bounding pulses. Features usually appear in newborns or early infancy.
Outlook and prognosis
Many people with patent ductus arteriosus do well, especially when it’s found early and treated. Small PDAs may close on their own; larger ones can be closed with a catheter procedure or surgery, lowering risks of heart strain and lung problems. Long-term follow-up with a cardiologist helps protect heart and exercise health.
Causes and risk factors
Patent ductus arteriosus typically stems from incomplete vessel closure present at birth. Risks rise with premature birth or low birth weight, maternal rubella infection, high-altitude birth, female sex, family history/genetic syndromes, and neonatal hypoxia or respiratory distress.
Genetic influences
Genetics play a modest role in patent ductus arteriosus (PDA); most cases are sporadic. Certain chromosomal conditions and single-gene syndromes raise risk, as can family history. Variants affecting heart development pathways may influence severity and recurrence.
Diagnosis
Doctors suspect patent ductus arteriosus from clinical features like a characteristic heart murmur and low oxygen readings. The diagnosis of patent ductus arteriosus is confirmed with imaging, usually echocardiography, sometimes chest X-ray or ECG.
Treatment and drugs
Patent ductus arteriosus treatment focuses on closing the vessel if it strains the heart or lungs. Options include watchful follow-up, medicines like indomethacin/ibuprofen in infants, catheter-based closure, or surgery. Care is tailored by age, size, symptoms, and heart findings.
Symptoms
Patent ductus arteriosus (PDA) can cause few or no obvious signs, especially when the opening is small. When features do appear, families may notice fast breathing, tiring with feeding or activity, or slow weight gain in babies, while doctors may hear a heart murmur. Early features of Patent ductus arteriosus can be subtle and often blend into daily routines. Features vary from person to person and can change over time.
Rapid breathing at rest or during feeding. The body works harder to move blood through the lungs. It may come and go.
Babies may tire or fall asleep while nursing or taking a bottle. Feeds can take a long time with small amounts taken. This can happen with Patent ductus arteriosus.
Slow weight gain despite regular feeds. Extra effort to breathe and feed can burn more calories. Doctors may watch growth more closely.
Babies may get sweaty on the head or body during feeding. This happens because the heart is working extra hard.
How people usually first notice Patent ductus arteriosus?
Many families first notice a patent ductus arteriosus (PDA) when a routine newborn exam picks up a whooshing heart murmur, even if the baby seems well. In other cases, the first signs of patent ductus arteriosus show up as fast breathing, poor feeding, sweating with feeds, or slow weight gain in the first weeks to months, prompting a check-up and an ultrasound of the heart (echocardiogram). Sometimes a small PDA isn’t noticed until later childhood when a doctor hears a persistent murmur during a sports physical or well visit, leading to tests that confirm how patent ductus arteriosus is first noticed for that child.
Types of Patent ductus arteriosus
Patent ductus arteriosus (PDA) can look quite different from one person to another, largely based on the size of the ductus and how it affects blood flow to the lungs and body. Doctors often describe types of PDA by size and by when and how they present, especially in newborns born early versus at term. Symptoms don’t always look the same for everyone. Below are the main types of PDA people may hear about when discussing types of Patent ductus arteriosus and how symptoms can differ.
Small (silent) PDA
The opening is tiny and may cause no noticeable symptoms. Many people feel well and learn about it only after a murmur is heard on a routine exam. Fatigue with heavy exercise can appear in some cases.
Moderate PDA
The ductus is larger and allows extra blood flow to the lungs. People may notice fast breathing, tiring with feeds or activity, and poor weight gain in infants.
Large PDA
A wide opening sends a lot of blood toward the lungs. Babies can have rapid breathing, sweating with feeds, and trouble growing, while older children may tire easily and get short of breath.
Preterm infant PDA
In babies born early, the ductus is more likely to stay open and cause breathing and feeding difficulties. Signs often include need for extra oxygen, fast breathing, and swelling from fluid overload.
Term infant/child PDA
In babies born at term or in older children, symptoms depend on size, ranging from none to easy tiring and shortness of breath. Some are found because of a heart murmur before symptoms appear.
Eisenmenger physiology
Very rarely, long‑standing large PDA can reverse blood flow due to high lung pressures. This can lead to bluish lips or fingers and reduced exercise capacity.
What genetics can tell you about symptoms
Some people with certain gene changes (like TFAP2B, MYH11, or chromosome 22q11.2 deletions) are more likely to have a patent ductus arteriosus that stays open after birth. These variants can affect heart tissue development, leading to murmurs, breathlessness, or poor weight gain.
Causes and risk factors
Patent ductus arteriosus happens when the fetal blood vessel that should close after birth stays open.
Premature birth, low birth weight, and early breathing problems raise the chance.
Rubella in early pregnancy, birth at high altitude, and being female also add risk.
Family history and some genetic conditions, like Down syndrome, are linked to it, so talk with your doctor if you notice early symptoms of patent ductus arteriosus.
Doctors distinguish between risk factors you can change and those you can’t.
Environmental and biological risk factors
Patent ductus arteriosus (PDA) is more likely under certain biological conditions and environmental exposures during pregnancy and the newborn period. Doctors often group risks into internal (biological) and external (environmental). These factors influence whether the duct stays open after birth, but they don’t necessarily predict what you’ll notice or the early symptoms of patent ductus arteriosus.
Babies born before 37 weeks have an immature vessel that may not close on its own, making PDA more likely. The earlier the birth, the higher the chance.
Smaller infants have thinner, less muscular ducts that are less responsive after delivery. The risk of PDA rises sharply with very low birth weight, below about 1,500 g (3 lb 5 oz).
Being born female is linked with a higher chance the duct remains open. The reason is not fully clear, but this pattern shows up across many studies.
Rubella infection during early pregnancy can disrupt normal heart vessel development and increase the chance the duct stays open. The first trimester carries the greatest risk.
Genetic risk factors
Genes can influence whether the ductus arteriosus closes as expected after birth. Some people inherit changes that affect how this vessel’s muscle senses oxygen, and others have chromosomal conditions where heart differences, including patent ductus arteriosus, are more common. Carrying a genetic change doesn’t guarantee the condition will appear. When doctors discuss genetic risk factors for patent ductus arteriosus, they often consider both family patterns and specific syndromes.
Family history: Having a parent or sibling with a congenital heart defect, especially patent ductus arteriosus, can raise risk. In some families, PDA appears across generations, though the exact genetic change may differ.
Char syndrome: A rare inherited change in the TFAP2B gene can cause PDA along with distinctive facial and hand features. It often runs in families in an autosomal dominant pattern.
Down syndrome: Trisomy 21 increases the chance of several heart differences, and patent ductus arteriosus can be one of them. In Down syndrome, PDA may occur by itself or alongside other heart defects.
Trisomy 18: This chromosomal condition is linked with a higher likelihood of PDA and other structural heart differences. When PDA occurs here, it often appears together with additional heart issues.
Smooth muscle genes: Rare variants in genes that control blood vessel muscle function, such as MYH11, have been found in some families with PDA. These changes can alter how the ductus arteriosus tightens and closes after birth.
Female sex: PDA is diagnosed more often in females than males. This is a population pattern and does not predict an individual outcome.
Lifestyle risk factors
Lifestyle habits do not cause patent ductus arteriosus, but they can influence symptoms, heart strain, and complication risks over time. Understanding how lifestyle affects Patent ductus arteriosus helps you tailor daily choices to protect heart and lung function. The elements below focus on practical areas that can modify breathlessness, fatigue, arrhythmia risk, and heart failure burden in PDA. Discuss any changes with your cardiology team, especially if the PDA is unrepaired or you have pulmonary hypertension.
Vigorous or competitive exertion can exacerbate shortness of breath, palpitations, or heart failure symptoms in unrepaired or hemodynamically significant PDA. Graduated, cardiologist-guided activity often improves stamina without overloading the heart.
High-salt eating promotes fluid retention that can worsen leg swelling, lung congestion, and heart failure symptoms in PDA. A lower-sodium pattern reduces volume load on the heart and may ease breathlessness.
Excess weight increases cardiac output demands and can intensify murmurs, fatigue, and heart failure risk in PDA. Gradual weight reduction lessens circulatory strain and may improve exercise tolerance.
Nicotine and inhaled toxins raise pulmonary pressures and irritate airways, aggravating the left-to-right shunt’s impact on the lungs in PDA. Quitting helps protect against pulmonary hypertension progression and reduces arrhythmia risk.
Risk prevention
Patent ductus arteriosus is a congenital heart difference, so there’s no guaranteed way to prevent it entirely. You can, however, lower risk by supporting a healthy pregnancy and by catching issues early in babies more likely to have PDA, such as those born preterm. Prevention works best when combined with regular check-ups. Talk to your doctor about which preventive steps are right for you.
Make sure immunity to rubella is in place before pregnancy to reduce heart defects, including patent ductus arteriosus. This is typically done with the MMR vaccine prior to conception, since live vaccines aren’t given during pregnancy.
Good prenatal care and well-controlled conditions like diabetes lower the chance of prematurity and some heart differences. Keeping glucose in range and attending regular antenatal visits can modestly reduce PDA risk.
Steps that reduce preterm birth—avoiding tobacco and alcohol, treating infections, and managing stress—lower the likelihood of PDA. Regular prenatal check-ins help spot early signs of preterm labor and guide timely care.
Before and during pregnancy, review all medicines and supplements with a clinician to avoid exposures that could affect fetal heart development. Safer alternatives and careful dosing plans can reduce risks linked to patent ductus arteriosus.
Transmission
Patent ductus arteriosus (PDA) is present at birth and isn’t infectious—you can’t catch it or spread it to others. Most PDA happens without a family history, but the chance is a bit higher if a parent or sibling has a congenital heart defect; this is the basic picture of how Patent ductus arteriosus is inherited. PDA is also more common in babies born early and can occur as part of certain genetic syndromes, though many full‑term babies with PDA have no known risk factors. When PDA does run in families, it reflects genetic transmission of Patent ductus arteriosus or related heart traits, which may come from inherited or new gene changes.
When to test your genes
Genetic testing isn’t routinely needed for isolated patent ductus arteriosus, but it’s worth considering if PDA occurs with other birth differences, growth or developmental concerns, a family history of congenital heart disease, or features suggesting a genetic syndrome. Testing can guide surveillance, family planning, and specialized care. Ask your cardiologist or a genetic counselor.
Diagnosis
Patent ductus arteriosus is often picked up during a newborn exam when a heart murmur or lower-than-expected oxygen levels raise questions, and sometimes it’s first suspected later in infancy or childhood if breathing or feeding seem harder than expected. Doctors usually begin with a hands-on exam and simple bedside checks, then confirm the diagnosis with heart imaging. The diagnosis of patent ductus arteriosus typically relies on echocardiography to see the ductus and how blood is flowing. In some cases, prenatal ultrasound can provide early clues before birth.
A clinician listens for a characteristic heart murmur and checks pulses in the arms and legs. They may look for fast breathing, poor weight gain, or a bounding pulse that can occur with PDA.
A small sensor on the hand or foot measures oxygen levels to see if blood is carrying enough oxygen. Differences between the right hand and a foot can hint at blood flow patterns seen with patent ductus arteriosus.
An ultrasound of the heart shows whether the ductus is open and its size. It also reveals how blood is shunting through the vessel and whether the heart chambers are enlarged from extra flow.
Using Doppler during the echocardiogram helps measure the speed and direction of blood through the ductus. This helps estimate how significant the PDA is and guides treatment planning.
Stages of Patent ductus arteriosus
Patent ductus arteriosus does not have defined progression stages. What happens over time depends on how wide the vessel remains and how much extra blood flows to the lungs; some close on their own in early infancy, others stay small and quiet, and larger openings can strain the heart. Early symptoms of patent ductus arteriosus can be subtle—like fast breathing, poor weight gain, or tiring with feeds—so doctors confirm the diagnosis with an echocardiogram (heart ultrasound) and check how hard the heart is working. Different tests may be suggested to help show its impact, such as pulse oximetry, a chest X-ray, or an ECG.
Outlook and prognosis
Living with patent ductus arteriosus (PDA) can look very different from one person to the next. Some babies have a small PDA that causes no clear symptoms and closes on its own; others develop fast breathing, poor weight gain, or tiring during feeds, which are common early symptoms of patent ductus arteriosus. The outlook is not the same for everyone, but small PDAs that don’t strain the heart often have an excellent long-term course, while moderate to large PDAs usually need treatment to prevent heart and lung complications.
Doctors call this the prognosis—a medical word for likely outcomes. With timely care, most children with PDA grow and develop well and lead active lives. If a PDA is closed in infancy or early childhood—by medication, catheter-based closure, or surgery—survival is excellent, and the risk of future heart failure or lung pressure problems stays low. When PDA remains open and large into later childhood or adulthood, it can lead to high lung blood pressure, heart rhythm issues, or heart failure; closing it before these changes take hold offers the best chance of normal longevity.
For adults diagnosed later, outcomes depend on heart size, lung pressures, and whether there’s any organ strain. After closure, most people can return to regular activities within weeks and have a near-normal life expectancy; some may need lifelong follow-up to watch valve function, rhythms, or blood pressure in the lungs. Early care can make a real difference, especially for premature infants or those with other heart differences. Talk with your doctor about what your personal outlook might look like, including activity goals, pregnancy planning, and how often to check in with a heart specialist experienced in congenital conditions.
Long-term effects
For many, the long view with patent ductus arteriosus depends on the size of the opening and whether it’s been closed. Long-term effects vary widely, from no ongoing issues to strain on the heart and lungs over time. While early symptoms of patent ductus arteriosus can be mild or even absent, the later picture may involve rhythm changes, high lung blood pressure, or heart enlargement. After successful closure, most people have an excellent outlook and full activity.
Extra blood flow to the lungs can enlarge the heart’s left side over time. This can eventually reduce pumping strength.
A large, unrepaired patent ductus arteriosus can raise pressure in the lung arteries. In advanced cases, this may become permanent and lead to low oxygen levels.
Irregular heart rhythms, often from the upper chambers, may develop after years of heart stretch. These can increase with age or long-standing heart enlargement.
A persistent patent ductus arteriosus slightly increases the risk of infection on the heart or nearby vessels. The risk generally falls after closure but does not drop to zero.
How is it to live with Patent ductus arteriosus?
Living with patent ductus arteriosus (PDA) can range from barely noticing anything to feeling easily winded with activity, depending on the size of the duct and whether it strains the heart and lungs. For many, day-to-day life is normal with routine checkups; others may adjust by pacing physical activity, watching for symptoms like shortness of breath or fatigue, and taking antibiotics only when specifically advised for procedures. Family and friends often become attentive partners—helping track appointments, encouraging heart‑healthy habits, and understanding when rest comes first—especially around times of treatment or recovery. With modern care, most people with PDA lead full lives, and closing a significant PDA usually reduces restrictions and worry for everyone involved.
Treatment and drugs
Treatment for patent ductus arteriosus (PDA) depends on the size of the ductus, symptoms, age, and heart strain. Small, quiet PDAs that don’t affect the heart may be watched with regular checkups; in premature newborns, medicines such as indomethacin or ibuprofen can help the duct close. If the PDA is moderate or large, or causing symptoms like fast breathing, poor weight gain, or signs of heart failure, doctors often close it with a catheter procedure using a tiny plug or coil placed through a blood vessel in the groin; most people go home the same day. Surgery through a small incision between the ribs is another option when catheter closure isn’t suitable, and medicines like diuretics may be used short term to ease fluid buildup before closure. Not every treatment works the same way for every person, so your doctor will help choose the safest, most effective approach for your situation and arrange follow-up to confirm the PDA is fully closed.
Non-drug treatment
Care for patent ductus arteriosus focuses on closing the opening when needed and easing the strain on the heart and lungs. Alongside medicines, non-drug therapies range from simple monitoring and nutrition support to procedures that seal the duct without open surgery. If early symptoms of patent ductus arteriosus are mild, doctors may simply watch and recheck the heart until the duct closes on its own. When the duct stays open or causes problems, closure can be done through a small catheter or, less often, surgery.
For small, symptom-free PDA, regular checkups and echocardiograms track closure. Many close naturally in the first months of life. Seek care sooner if breathing, feeding, or growth problems appear.
A heart specialist threads a small tube through a leg vein or artery to place a plug in the duct. Most people go home the same day or after one night with a quick recovery. This option suits many infants, children, and adults when the anatomy is right.
A surgeon makes a small incision between the ribs to tie, clip, or sew the duct closed. It is used when catheter closure is not possible or in very small premature babies. Hospital recovery is usually a few days with follow-up to check healing.
High-calorie feeds, paced bottles, or feeding therapy reduce fatigue and support growth. Dietitians can help set targets and adapt feeding plans. Good weight gain lowers stress on the heart.
Your genes may have an impact on how drugs work for you
Medications for patent ductus arteriosus can work differently depending on genes that affect how infants process drugs like indomethacin or ibuprofen. These genetic differences may change dose needs or side‑effect risks, so clinicians individualize treatment and monitor closely.
Pharmacological treatments
Most medicines for patent ductus arteriosus are used in premature babies to help close the vessel. Doctors most often use indomethacin or ibuprofen; acetaminophen (paracetamol) is another option when those aren’t suitable. In full-term infants, children, and adults, drugs rarely close a PDA, so medications mainly ease symptoms like fast breathing or poor weight gain from early symptoms of patent ductus arteriosus while a catheter or surgical closure is planned. Not everyone responds to the same medication in the same way.
Indomethacin is given in the newborn period (usually in preterm infants) to help close the ductus. It can affect kidney blood flow and the gut, so doctors monitor urine output, platelets, and feeding tolerance.
Ibuprofen (including ibuprofen lysine) is another medicine commonly used to close a PDA in premature babies. First-line medications are those doctors usually try first, based on safety and effectiveness in most patients.
Acetaminophen (paracetamol) may close a PDA when indomethacin or ibuprofen aren’t suitable or haven’t worked. Liver function is checked during treatment, and evidence supports its use especially in very small infants.
Furosemide and other diuretics can ease lung congestion and breathing effort caused by a sizable PDA. They help while planning catheter-based or surgical closure, and electrolytes and growth are monitored.
Genetic influences
If a baby in your family was born with patent ductus arteriosus (PDA), it’s reasonable to wonder whether genes play a role. Most PDAs aren’t caused by a single gene; they often happen sporadically and are especially common in babies born early. Even so, a family history of patent ductus arteriosus can raise the chance slightly for future children. In a small number of cases, PDA is part of a genetic syndrome or a chromosome difference, or it can cluster in families due to a single gene change—these situations may come with other features, such as differences in the face, hands, or other parts of the heart. Because the same underlying change can affect people differently, one relative might have a small PDA that closes on its own while another needs treatment. To put these pieces together, doctors may suggest genetic counseling.
Is Patent ductus arteriosus genetic?
Genetics play a modest role in patent ductus arteriosus (PDA); most cases are sporadic. Certain chromosomal conditions and single-gene syndromes raise risk, as can family history. Variants affecting heart development pathways may influence severity and recurrence.
Pharmacogenetics—how genetics influence drug effects
For Patent ductus arteriosus (PDA), the medicines used to help close the duct—most often ibuprofen, indomethacin, or sometimes acetaminophen—don’t work the same in every baby. Genes can influence how quickly you break down these medicines, which may affect whether the duct closes and the risk of side effects like kidney strain or bleeding. Differences in liver and kidney enzymes can leave drug levels higher or lower than expected, so some infants need fewer doses, a different drug, or a move to catheter-based closure sooner. Variations in the body’s prostaglandin pathways, the signals these drugs target, may also play a role in who responds. Some forms of PDA occur with inherited conditions, which can shape overall heart care plans, but they don’t yet point to a single best medication. At this time, pharmacogenetic testing isn’t routine for PDA; clinicians mainly adjust treatment based on birth weight, gestational age, kidney function, and how the baby responds at the bedside, and this may evolve as research grows.
Interactions with other conditions
Breathing and feeding difficulties from a lung illness can feel tougher when a ductus remains open, because extra blood is pushed to the lungs and the heart works harder. In preterm babies, conditions like respiratory distress or bronchopulmonary dysplasia can worsen with this extra flow, and early symptoms of patent ductus arteriosus may be easy to miss or blame on the lung problem itself. Doctors call it a “comorbidity” when two conditions occur together. Patent ductus arteriosus may also appear with other heart differences, such as a tight aorta (coarctation) or a hole between chambers; sometimes the open ductus temporarily masks how severe another heart issue is, and closing it can reveal the true picture. In older children or adults with an unrepaired ductus, there’s a higher chance of an infection of the heart’s inner lining (infective endocarditis), especially if there are dental or skin infections, and long-term strain can raise pressure in the lung arteries when there’s underlying lung disease. Overall, when patent ductus arteriosus occurs alongside other conditions, care teams often coordinate timing and type of treatment so one problem isn’t made worse while treating another.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
History
Families and midwives once noticed some newborns who tired easily at the breast and breathed fast, while others grew well but had a soft, persistent chest murmur that puzzled everyone. Community stories often described the condition as a “hole in the heart,” a simple phrase for something more complex that affected babies and, at times, adults who had never been diagnosed in childhood.
First described in the medical literature as a connection that failed to close after birth, the finding matched what doctors heard through the stethoscope: a continuous “machinery” murmur. As medical science evolved, autopsies and early surgical notes confirmed that this vessel—the ductus arteriosus—normally closes shortly after delivery but sometimes stays open. Over time, descriptions became more precise, linking the open duct to symptoms such as poor feeding, sweating, and slow weight gain in infants, and later breathlessness or exercise limits in older children.
From early theories to modern research, the story of patent ductus arteriosus has moved from careful listening to targeted treatment. In the early 20th century, surgeons attempted the first ligations, turning a once fatal or debilitating heart issue into one that could often be corrected. With each decade, safer anesthesia, better imaging, and refined techniques improved outcomes, and many children left the hospital with a normal or near‑normal life ahead.
Initially understood only through symptoms, later echocardiography showed blood flow across the duct in real time, making diagnosis quicker and less invasive. Catheter-based closure devices, introduced in the late 20th century, meant that many people could avoid open surgery altogether. These advances also revealed how varied patent ductus arteriosus can be—tiny ducts found incidentally, moderate ones causing feeding struggles, and large ducts straining the heart and lungs.
In recent decades, awareness has grown around PDA in preterm infants, where the duct is more likely to stay open and may complicate breathing and growth. Neonatal intensive care units began using medicines to help close it, alongside careful monitoring to decide when treatment helps most. This shift reflected a broader trend: tailoring care to the size of the duct, the person’s age, and how the heart and lungs are coping.
Looking back helps explain why some adults today learn about a small, silent patent ductus arteriosus only when a doctor hears an unusual murmur or a scan done for another reason spots it. Despite evolving definitions, the through-line remains the same: careful observation led to early surgery, imaging transformed diagnosis, and modern devices and medicines made treatment safer. Each step added clarity, turning a once mysterious murmur into a well-understood condition with reliable paths to care.