Cardiology · Structural Heart
ASD Device Closure
Sealing a hole in the heart through a vein
Also known as: ASD closure · Atrial septal defect device closure · septal occluder implantation · hole-in-the-heart closure without surgery
Medically reviewed by Dr Kunal Ajay Patankar, DrNB (Cardiology) · July 2026
What it is
Think of the heart's two upper chambers as adjoining rooms that share a wall. Before birth, every baby has a doorway in that wall — it is how the circulation works in the womb — and it normally seals shut in the first months of life. In an ASD, the doorway stays open. With every heartbeat, some oxygen-rich blood that should go out to the body slips back through the gap into the right side of the heart and makes a pointless second trip through the lungs.
The heart copes so well at first that many people feel nothing for years. But the right-side chambers are quietly handling the extra traffic every minute of every day, and they slowly stretch and enlarge. Given enough years, that brings breathlessness, tiredness, rhythm disturbances, and — in a minority — lasting damage to the lung circulation.
Device closure seals the doorway without surgery. Through a vein at the top of the leg, a folded double-disc device travels up into the heart, guided by echo and X-ray. One soft mesh disc opens on the left side of the hole, one on the right, and the wall is sandwiched shut between them. The device stays; within months your own heart tissue grows over it completely, making the repair permanent. No chest incision, no heart-lung machine — usually home within a day or two.
An ASD is usually found and measured on an echo, and Heart Simplified explains what your echo report is telling you ↗.
Who it's for
- ASD with right heart enlargement on echocardiography
- Breathlessness, palpitations or reduced stamina from the defect
- Suitable rims around the defect on imaging (assessed by TEE)
- Children, adults and even older patients — age is rarely a barrier
Signs you might need it
- Breathlessness on exertion that has crept up over years
- Tiring more easily than others your age
- Palpitations or irregular heartbeats (atrial rhythm problems)
- Repeated chest infections, especially in children
- In children — poor weight gain or reduced stamina at play
- Often no symptoms at all: many ASDs are found by chance, when a murmur or an abnormal ECG leads to an echo
How we confirm you need it
- Echocardiography (echo) — finds the hole, sizes it, and shows how much the right heart has enlarged
- Transoesophageal echo (TEE) — a closer look from behind the heart; measures the defect and its rims precisely and confirms a device will sit securely
- ECG — often shows the tell-tale electrical pattern of right-heart strain
- In selected cases, a heart catheterisation to measure lung pressures directly
- The same imaging decides the device size — the measurements are made before and during the procedure, not guessed
How it happens, step by step
1
Sizing
Transoesophageal echo measures the defect and its rims precisely, selecting the right device size.
2
Delivery
Under echo and X-ray guidance, the folded device travels through a leg vein into the heart.
3
Deployment
One disc opens on the left side, one on the right — the septum is sandwiched and the hole sealed instantly.
4
Stability check
Gentle testing confirms the device is anchored before release. Heart tissue grows over it within months.
Inside a real procedure
Real, de-identified views from Dr Kunal Patankar's own cases — shared so you can see what this actually looks like.
The benefits
- A permanent repair without opening the chest — no scar on the sternum, no heart-lung machine
- Stops the extra blood flow immediately; the enlarged right heart typically shrinks back over the following months
- Home in a day or two; children are back at school and adults at work within days
- Removes the long-term burden the hole would impose — the earlier rhythm problems and breathlessness are prevented rather than treated
- Decades of worldwide experience with these devices, with excellent long-term safety
The risks
- Access-site problems at the groin — bruising or bleeding, uncommonly a vessel injury needing treatment
- Device embolisation — the device slipping from the defect, usually within the first hours; it can almost always be retrieved through the same vein and is the reason we test stability before release
- Rhythm disturbances — usually brief and early; a small number of patients notice palpitations while the heart adjusts
- A small residual leak around the device in some cases, which usually seals as tissue grows over it
- Device erosion — a rare but serious late complication where a disc edge wears against the heart wall; careful sizing and rim assessment exist precisely to keep this risk very low
- Clot formation on the device before tissue covers it — the reason for the months of aspirin (and often clopidogrel)
Alternatives we'll discuss
Surgical closure
The established open-heart repair — a patch stitched over the hole. It remains the right answer for large defects, deficient rims, and non-secundum ASD types (primum, sinus venosus). Results are excellent; the trade-off is a chest incision, the heart-lung machine, and a longer recovery.
Watchful waiting
Small defects with a normal-sized right heart often need no intervention — just periodic echo follow-up. In young children, some small secundum defects close on their own. Watching is a decision, not a default: the moment the right heart starts enlarging, the balance shifts towards closure.
Medicines alone
There is no medicine that closes a hole in the heart. Tablets can ease symptoms or control rhythm problems once they appear, but they do not stop the extra blood flow that causes them. For a significant ASD, medication is a companion to closure, not a substitute.
Preparing for it
- Complete the imaging workup — echo, and usually a TEE to measure the defect and its rims
- Blood tests, and a review of any blood thinners with the team
- Fast from midnight before the procedure as instructed
- Tell the team about any allergies, including to metals or contrast dye
- Plan for one to two nights in hospital and a quiet week afterwards
Recovery
- Home within 24–48 hours
- Back to school or work within days
- Aspirin (and sometimes clopidogrel) for a few months while tissue covers the device
- Echo follow-up at intervals; most patients need no further treatment ever
Results & durability
- Successful closure in well over 95% of suitably selected patients
- The enlarged right heart typically remodels back towards normal size over the following months
- Stamina and breathlessness improve steadily as the heart adjusts
- After the first six months of tissue cover and antiplatelet protection, most patients need no long-term medication for the ASD
- Long-term follow-up is simple: periodic echo checks, which we schedule for you
Cost & insurance
What affects the cost
- The device itself is the largest single component; the hospital, room category and imaging (TEE) also contribute
- ASD device closure is covered by many private insurance policies and several government schemes — coverage varies by plan
- We help you check exactly what your policy covers before anything is scheduled
- For a figure specific to your case and cover, please book a consultation — generic prices online rarely match reality
Common questions
Is ASD device closure painful?
No. It is done through a leg vein under anaesthesia or deep sedation, so you sleep through it. Afterwards there is only a small puncture site at the groin — no chest wound, no stitches on the heart.
Will the device be rejected?
No. The occluder is made of biocompatible nitinol mesh used worldwide for decades; your own tissue covers it completely within months. Rejection, in the way people fear with transplants, does not happen with these devices.
Can every ASD be closed with a device?
Most secundum ASDs with adequate rims can. Very large defects, deficient rims, or other ASD types (primum, sinus venosus) still need surgical closure — the imaging tells us this clearly beforehand, so there are no surprises on the table.
My child has an ASD — when should it be closed?
Timing depends on the size of the hole and how much the right heart has enlarged. Many are closed electively before school age; small defects are sometimes simply watched, as a proportion close on their own in early childhood. A detailed echo review defines the right window.
Am I too old to have my ASD closed?
Age alone is rarely the barrier. Adults in their 50s, 60s and beyond benefit from closure if the right heart is enlarged and the lung pressures are still favourable — that last part is exactly what the workup checks.
Will the device set off airport security or block MRI scans?
No. The device is a few grams of fine metal mesh — it does not trigger airport detectors, and modern occluders are MRI-conditional, meaning scans can be done safely; just tell the team you have one.
What medicines will I need afterwards?
Aspirin (and often clopidogrel) for about six months while your own tissue grows over the device, and antibiotic precautions before dental work for the first six months. Most patients need nothing long-term after that.
Can the device slip out of place?
It is uncommon, and when it happens it is usually within the first hours — while you are still monitored. We test stability with gentle tugs before release; if a device is not stable, we simply do not release it. A migrated device can almost always be retrieved through the same vein.
Is closing the hole with a device better than surgery?
For suitable secundum defects, device closure achieves the same result as surgery with no chest opening, a day or two in hospital, and a far quicker return to life. Where the anatomy does not suit a device, surgery remains a safe, well-proven operation — and we say so plainly.
What happens if an ASD is never closed?
Small defects may cause no trouble for years. But a significant hole quietly overworks the right heart — over decades this can bring breathlessness, rhythm problems (like atrial fibrillation), and in a minority, irreversible pressure damage to the lung circulation. Closing it at the right time is far simpler than treating those consequences.
References
- 2018 AHA/ACC Guideline for the Management of Adults With Congenital Heart Disease ↗
- 2020 ESC Guidelines for the management of adult congenital heart disease ↗
Medically reviewed by Dr Kunal Ajay Patankar, DrNB (Cardiology) · Last reviewed July 2026. This page is educational and not a substitute for a personal consultation.
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