VSD Device Closure

Introduction

If your child has been diagnosed with a ventricular septal defect (VSD) and your cardiology team has raised the option of closing it with a device rather than open-heart surgery, you are likely weighing a lot of information at once. This article is written for parents and families in that position — and, in some cases, for adults who are themselves preparing for VSD device closure.

A ventricular septal defect is a hole in the wall that separates the two lower pumping chambers of the heart. It is one of the most common congenital (present-at-birth) heart defects. Some small VSDs close on their own as a child grows. Others stay open and, depending on size and location, can place strain on the heart and lungs over time.

VSD device closure is a catheter-based procedure that seals the hole from inside the heart, without opening the chest. It is not the right approach for every VSD, but for selected defects it offers a less invasive route to the same goal: stopping abnormal blood flow between the ventricles and protecting the heart and lungs for the long term.

This guide walks through what the procedure is, who it suits, the alternatives your team will consider, how to prepare, what happens on the day, what recovery looks like, the risks involved, and what life and follow-up look like afterwards.

What Is VSD Device Closure?

VSD device closure — sometimes called transcatheter VSD closure or percutaneous VSD closure — is a minimally invasive cardiac procedure in which a specially designed implant is used to plug a hole in the wall between the heart’s two ventricles. The device is delivered through a thin tube called a catheter, which is passed into the heart through a blood vessel in the groin or neck. The chest is not opened, and the heart does not need to be stopped.

The closure devices themselves are usually made of a fine wire mesh (often nitinol) shaped into two small discs connected by a short waist. Once the device is positioned across the VSD, the discs sit on either side of the hole and pinch the edges of the defect between them. Over the following weeks and months, the body’s own tissue grows over the device, and it becomes a permanent part of the heart wall.

Although families sometimes refer to the procedure as “VSD device closure surgery,” it is technically an interventional cardiology procedure rather than surgery. It is performed in a cardiac catheterisation laboratory (“cath lab”) by a paediatric or adult interventional cardiologist, often with a cardiac surgeon available as a backup.

Key features at a glance

• Catheter-based approach — no chest incision and no heart-lung bypass machine
• Performed under general anaesthesia in a cath lab
• Guided by X-ray (fluoroscopy) and echocardiography (heart ultrasound)
• Hospital stay is typically shorter than after open-heart surgery
• Suitable only for certain VSD locations and sizes

Understanding Ventricular Septal Defects

Common types of VSD

• Muscular VSDs are surrounded entirely by muscle. They can be in the central, apical (tip), or anterior part of the septum. Many muscular VSDs are well suited to device closure.
• Perimembranous VSDs sit near the heart valves, in a thinner area of the septum. They are the most common type of VSD. Device closure of perimembranous defects is possible but requires careful evaluation because the defect lies close to the aortic and tricuspid valves and to the heart’s electrical conduction system.
• Inlet VSDs sit in the part of the septum below the tricuspid and mitral valves. These usually require surgical repair.
• Outlet (subarterial or supracristal) VSDs sit just below the aortic and pulmonary valves. These usually require surgical repair to protect the aortic valve.
• Post-surgical or post-infarction VSDs can occur after heart surgery or, in adults, after a heart attack. Selected cases can be closed with a device.

Your cardiologist will have described where your child’s VSD sits and whether its anatomy is favourable for a device.

Why Is VSD Device Closure Performed?

Not every VSD needs to be closed. Many small VSDs cause no symptoms, do not strain the heart, and close on their own during early childhood. Closure — whether by device or surgery — is considered when the defect is large enough, or its effects significant enough, that leaving it open carries risk.

The underlying problem with a moderate-to-large VSD is that blood under high pressure in the left ventricle leaks across the hole into the right ventricle and then into the lungs. Over time this extra blood flow can:

• Make the heart work harder than it should
• Cause symptoms of heart failure in infants — fast breathing, sweating with feeds, poor weight gain
• Lead to recurrent chest infections
• Cause the blood vessels in the lungs to thicken, leading to pulmonary hypertension (high pressure in the lung circulation)
• Predispose to a heart infection called infective endocarditis
• In some cases, contribute to aortic valve problems if the defect lies near the valve

Pediatric cardiology guidelines from major societies, including the American Heart Association and American College of Cardiology, broadly support closure of VSDs that cause symptoms, significant left-heart enlargement, or rising lung pressures. Whether closure happens by device or by surgery depends on the defect’s anatomy, the child’s size and overall condition, and the experience of the team.

Who Is a Candidate for VSD Device Closure?

Device closure is not a universal alternative to surgery. The interventional cardiologist looks closely at the defect’s location, its size, the distance from nearby valves, and the rims of tissue around the hole that the device needs to grip. Imaging — especially transthoracic and sometimes transoesophageal echocardiography — is central to this decision.

Defects often suitable for device closure

• Muscular VSDs that are away from the heart valves and have firm tissue rims
• Selected perimembranous VSDs with adequate distance from the aortic valve, evaluated by experienced operators
• Residual VSDs after previous surgical repair
• VSDs in patients in whom open-heart surgery carries higher-than-usual risk

Situations where surgery is usually preferred

• Very large VSDs
• Inlet or outlet VSDs
• VSDs sitting very close to the aortic valve
• VSDs in very small infants (under a certain weight, often around 8–10 kg, where catheter equipment is harder to use safely)
• VSDs accompanied by other heart defects that themselves need surgical correction
• Severe, fixed pulmonary hypertension where closure may no longer be appropriate at all

Eligibility for device closure is a clinical judgement made by the cardiology team based on detailed imaging, the child’s overall health, and growth. If your child is not considered a device candidate, this does not mean their case is worse — it usually means the anatomy favours surgical repair, which remains a very well-established and effective treatment.

Alternatives to VSD Device Closure

When the cardiology team raises the option of device closure, they are usually weighing it against one or more of these alternatives.

Watchful waiting (observation)

Many small VSDs — especially small muscular ones — close spontaneously during the first few years of life. If the defect is small, the child is growing well, the heart is not enlarging, and lung pressures are normal, the cardiologist may recommend periodic follow-up rather than any intervention. Echocardiograms are repeated at intervals to track the defect.

Medical management

While the heart and child are observed, medications may be used to manage symptoms. In infants with heart failure from a moderate-to-large VSD, doctors may prescribe diuretics (to reduce fluid overload) and sometimes other heart medications. Medications do not close the defect — they buy time and ease symptoms while the team decides on definitive treatment.

Surgical VSD closure

Open-heart surgical repair has been the standard treatment for VSDs for decades and remains the option of choice for many defects. The surgeon opens the chest, places the patient on a heart-lung bypass machine, opens the heart, and closes the defect with a patch (usually of pericardial tissue or synthetic material) stitched into place. Long-term outcomes after surgical closure are very good, with high success rates and a strong evidence base.

Compared to device closure, surgical closure can address a wider range of defect locations, allows direct inspection of the heart, and can be combined with the repair of other associated defects. Its trade-offs are a chest incision, time on bypass, a longer hospital stay, and a more involved recovery.

Hybrid procedures

In some cases, especially in small infants with muscular VSDs, the surgeon and interventional cardiologist work together in a hybrid procedure. The chest is opened, but instead of using the bypass machine, the device is delivered directly through the wall of the beating heart under echocardiographic guidance. Hybrid procedures are used selectively in specialised centres.

Which option fits a particular child depends on the defect, the child, and the team’s experience. It is reasonable to ask the cardiologist to explain why a device approach is being offered (or not) in your child’s specific situation.

Preparing for VSD Device Closure

Preparation begins well before the day of the procedure and focuses on confirming the diagnosis, ensuring the child is fit for anaesthesia, and helping the family understand what to expect.

Investigations your team may arrange

• Detailed transthoracic echocardiogram — to map the VSD’s size, location, rims, and relationship to nearby valves
• Electrocardiogram (ECG) — to assess heart rhythm and chamber enlargement
• Chest X-ray — to look at heart size and lung blood flow
• Blood tests — including blood counts, kidney and liver tests, clotting, and blood group
• Transoesophageal echocardiogram (TOE) — in selected cases, to look at the defect from inside the oesophagus for better detail; in children this may be done under sedation
• Cardiac catheterisation with pressure measurements — in some cases, particularly to assess lung pressures before closure

Practical preparation

• The child is usually admitted the day before, or the morning of, the procedure
• Fasting is required for several hours beforehand, with timing explained by the anaesthetist (infants typically need shorter fasting than older children)
• Any ongoing medications are reviewed; some may be paused, others continued
• The anaesthetist meets the family to discuss general anaesthesia, airway management, and any specific concerns
• Consent is taken after a detailed discussion of benefits, risks, and the possibility of switching to surgery if the device approach is not successful

Helping a child prepare emotionally

For older children, simple, honest explanations tend to help more than detail. Talking through where the hospital is, who will be there, that they will be asleep during the procedure, and what the recovery room will look like reduces anxiety on the day. Play specialists, where available, can be invaluable.

What Happens During VSD Device Closure

The procedure typically takes between one and three hours, depending on the defect’s anatomy and the child’s response. The team usually includes an interventional cardiologist, an anaesthetist, a paediatric echocardiographer, nursing and technical staff, and often a surgeon available in the building as a precaution.

Step by step

1. Anaesthesia. The child is given general anaesthesia. A breathing tube is placed, and monitoring lines are attached.
2. Vascular access. Thin catheters are inserted into a vein and sometimes an artery, usually in the groin. In smaller children or specific anatomies, the neck (jugular vein) may be used.
3. Imaging setup. Echocardiography — either transoesophageal or, in some cases, intracardiac — provides real-time pictures of the heart from inside the body. Fluoroscopy (live X-ray) is also used.
4. Crossing the defect. A soft guidewire is gently steered across the VSD. A loop or “rail” is then created so the delivery system can be positioned across the hole.
5. Sizing. The defect’s exact size and shape are confirmed by imaging and sometimes by a sizing balloon. The correct device is selected.
6. Device delivery. The chosen device is collapsed into the delivery catheter and advanced to the heart. One disc is deployed on one side of the septum, the device is pulled snugly against the defect, and the second disc is deployed on the other side.
7. Checking position. Before the device is released, the team checks its position carefully with imaging. They look for any leak around the device, any effect on nearby valves, and any change in heart rhythm.
8. Release. When the team is satisfied, the device is detached from the delivery cable.
9. Final assessment. Heart rhythm, valve function, and the device’s position are checked again. The catheters are removed, and pressure is applied to the access sites.

If at any point the team feels the device is not seating well, is affecting a valve, or is causing rhythm problems, the device can be retrieved and a different size tried — or the procedure can be stopped and surgical closure planned instead. Families are informed in advance that this is a possibility.

Recovery After VSD Device Closure

One of the main reasons families consider device closure is that recovery is generally faster and gentler than recovery from open-heart surgery. That said, this is still a heart procedure under general anaesthesia, and recovery deserves planning.

In the hospital

• The child wakes up in a recovery area or a cardiac high-dependency unit and is monitored closely for several hours
• Heart rhythm is watched on a continuous monitor, because rhythm disturbances are an important early concern
• An echocardiogram is usually performed within 24 hours to confirm device position and check for any residual leak
• Pain is generally mild and managed with simple painkillers
• Mobilisation begins the same day or the next morning, depending on the access site
• Most children are ready for discharge within 1 to 3 days, though this varies

At home in the first few weeks

• The access site (usually in the groin) needs to be kept clean and dry for the first few days
• Strenuous activity, contact sports, and rough play are usually restricted for a defined period — your cardiologist will give specific guidance based on the device and the child’s age
• School and most normal activities can typically resume within a week or two for older children
• Antiplatelet medication, usually aspirin, is commonly prescribed for several months to reduce the risk of clots forming on the device while heart tissue grows over it
• Antibiotic cover for dental and certain other procedures is recommended for a period after device implantation, to reduce the risk of infection on the device; the cardiologist will explain the exact duration

Follow-up schedule

Follow-up appointments after device closure typically include:

• An early review within a few weeks, with echocardiogram and ECG
• Further reviews at intervals over the first year
• Long-term follow-up with a cardiologist, usually annually, even after the device has fully endothelialised (covered by heart tissue)

VSD device closure has a strong safety record in appropriately selected patients, but no heart procedure is risk-free. Understanding the possible complications helps families make an informed decision and recognise warning signs after discharge.

Procedural risks

• Bleeding or bruising at the access site — usually minor
• Blood vessel injury — uncommon, more relevant in very small children
• Reactions to anaesthesia or contrast dye
• Radiation exposure from fluoroscopy — doses are kept as low as reasonably possible

Device-related risks

• Device embolisation or displacement — the device moves from its intended position. This is uncommon but may require retrieval, repositioning, or surgery.
• Residual leak (residual shunt) — a small amount of blood continues to flow across the defect. Small residual leaks often close on their own.
• Heart rhythm disturbances — including transient or, less commonly, persistent disturbances. Complete heart block, where the heart’s electrical signal is disrupted, is a recognised concern with closure of perimembranous defects and can sometimes require a pacemaker. Careful case selection has reduced this risk significantly.
• Effect on nearby valves — particularly the aortic or tricuspid valve, where the device sits close.
• Device infection (endocarditis) — rare, but the reason for antibiotic precautions.
• Clot formation on the device — the reason for antiplatelet medication after the procedure.

The team will discuss these risks in the context of the specific defect and weigh them against the risks of the alternatives, including surgery and continued observation.

Outcomes and Long-Term Outlook

For carefully selected VSDs, transcatheter device closure has been shown in clinical studies and in registry data to achieve complete closure or near-complete closure in a high proportion of patients, with low rates of serious complications. Most children return to full normal activity, including sports, once their cardiologist confirms that the device is well-positioned, the heart is functioning normally, and any restriction period has ended.

Over the longer term, families can expect:

• The device becomes a permanent part of the heart wall, covered by the heart’s own lining
• Heart size and function, if they were affected by the VSD, typically improve over months
• Lung pressures, if elevated, usually decrease once abnormal blood flow stops — though severe long-standing pulmonary hypertension does not always reverse
• Growth and exercise tolerance improve in children whose VSD was causing symptoms
• Periodic cardiology follow-up continues into adolescence and adulthood

It is worth noting that adults who had a VSD closed in childhood — whether by device or surgery — benefit from staying connected to adult congenital heart disease (ACHD) services, where these exist, for lifelong heart health monitoring.

Life After VSD Device Closure

Activity and sport

Most children, once cleared by their cardiologist, can participate in normal physical activity and sport. Specific advice depends on the defect, the device, and any residual findings. Children who had heart failure or growth delay before closure often catch up on growth and energy levels noticeably in the months that follow.

Dental and procedural care

For a defined period after device placement — commonly six months, although guidance varies — antibiotic cover is recommended before certain dental and surgical procedures to reduce the risk of infective endocarditis on the device. The cardiologist provides written guidance on this. Maintaining excellent dental hygiene is part of long-term care.

Future pregnancies and adult life

For girls who undergo successful device closure in childhood, pregnancy in adulthood is usually well tolerated, particularly when heart function is normal and pulmonary pressures are not raised. Adult women with a history of VSD — closed or otherwise — are advised to have a pre-pregnancy cardiology review.

MRI scans

The closure devices in current use are generally MRI-conditional, meaning MRI scans are usually safe under defined conditions. Families should mention the device whenever any imaging is being arranged.

VSD Device Closure in Adults

Most VSD device closures are performed in children, but the procedure is also used in adults, including:

• Adults who had a VSD identified in childhood but did not undergo closure
• Adults with a residual VSD after previous surgical repair
• Selected adults with a post-myocardial-infarction VSD — a hole that develops in the septum after a heart attack — where the team feels device closure is feasible and surgical risk is high

In adults, the work-up is similar but often includes more detailed assessment of pulmonary pressures and overall cardiac function. Recovery in adults follows broadly the same pattern as in children, with the same antiplatelet and endocarditis precautions.

Frequently Asked Questions

Is VSD device closure considered surgery?

Not in the traditional sense. The chest is not opened and the heart is not stopped. It is a catheter-based interventional procedure performed in a cath lab. However, it is still performed under general anaesthesia and is a significant heart procedure, so the planning and care around it are similar in seriousness to surgery.

Can every VSD be closed with a device?

No. Suitability depends on the size and location of the defect, the tissue rims around it, the child’s size, and any other heart problems. Inlet and outlet VSDs, very large defects, and defects in very small infants are typically managed surgically. The cardiology team will explain why a particular approach is being recommended.

How long does the device stay in the heart?

Permanently. Within weeks to months of placement, the body’s own tissue grows over the device. It becomes part of the heart wall and is not removed.

Will my child need medications afterwards?

Most children take aspirin or another antiplatelet medication for a period of months after the procedure to reduce the risk of clots forming on the device. Antibiotic cover is also recommended for certain dental and surgical procedures for a defined period. Beyond that, ongoing medication is not usually required if the heart is working normally.

Can the device move out of place after closure?

Device displacement is a recognised but uncommon complication. The risk is highest in the first hours and days after the procedure, which is why the echocardiogram is repeated before discharge and at early follow-up. Once tissue has grown over the device, the risk becomes very small.

How soon can my child return to school and sport?

Many children return to school within one to two weeks. Returning to sport, particularly contact sport, follows a longer timetable set by the cardiologist, often after the early follow-up echocardiogram confirms a good result.

Will my child need follow-up for the rest of their life?

Long-term cardiology follow-up is recommended. The intervals lengthen over time, but staying connected to a cardiology service — ideally an adult congenital heart disease service in adulthood — allows any late issues to be picked up early.

What happens if the device closure does not succeed?

If, during the procedure, the team finds that the device cannot be safely positioned, the device is removed and the procedure is stopped. Surgical closure is then planned. This is uncommon when patient selection has been careful, but families are counselled about it in advance.

Conclusion

A diagnosis of a ventricular septal defect can be unsettling, particularly when the defect is large enough to need treatment. The good news is that VSDs are well understood, and treatment options — including transcatheter device closure for selected defects — have strong track records.

VSD device closure offers a way to seal a hole in the heart without opening the chest, with a shorter hospital stay and a gentler recovery than open-heart surgery. It is not the right approach for every VSD, and the decision rests on detailed imaging, the defect’s anatomy, and the experience of the team. Where it is suitable, it can return a child’s heart to normal circulation and allow growth, activity, and development to continue in the way they should.

The most important conversations to have with the cardiology team are about your child’s specific defect, why a particular approach is being recommended, what the follow-up plan looks like, and what to watch for at home. These conversations — not the procedure itself — are where families usually find the clarity they need.