PFO/ASD Closure
Patent Foramen Ovale (PFO) and Atrial Septal Defect (ASD) are conditions where there is an opening between the upper chambers of the heart. While many people have no symptoms, in some cases these openings can affect blood flow and increase health risks. At Heart Doc, we offer expert assessment and minimally invasive closure procedures to reduce risks, relieve symptoms, and protect long-term heart health.
What are PFO and ASD?
The heart is made up of four chambers, separated by walls known as septa. In some individuals, there is an opening in the wall between the two upper chambers (the atria).
A Patent Foramen Ovale (PFO) is a small, flap-like opening that is present in everyone before birth. It usually closes naturally soon after birth, but in around one in four people it remains partially open into adulthood.
An Atrial Septal Defect (ASD) is different. It is a true hole in the atrial septum that develops before birth and does not close on its own.
Both conditions can allow blood to pass between the atria. Most people with a PFO never experience symptoms. However, in some cases it has been associated with certain types of stroke or migraine. A larger ASD, if left untreated, can place extra strain on the heart and lungs over time, potentially leading to symptoms and long-term complications.
What is PFO/ASD Closure?
PFO and ASD closure is a minimally invasive procedure designed to seal the opening between the atria without the need for open-heart surgery.
During the procedure:
- A thin, flexible tube (catheter) is passed through a vein in the groin and guided up to the heart
A small closure device, often described as shaped like a double umbrella, is positioned across the opening
Over time, the heart’s own tissue grows over the device, sealing the opening permanently
The procedure is typically straightforward and well tolerated.
Who might benefit from Closure?
Closure may be recommended for:
Patients who have had a stroke where no other clear cause has been identified and a PFO is present
Patients with a significant ASD that is causing symptoms or changes to heart structure or function
Selected patients with rarer conditions, such as low oxygen levels in the blood or divers affected by decompression sickness (“the bends”)
At Heart Doc, every decision is made following a careful, individualised assessment.
Benefits of Closure
Reduced risk of further strokes related to a PFO.
Restoration of more normal blood flow between the heart chambers.
Improvement in symptoms such as breathlessness, palpitations, or reduced exercise capacity (particularly with ASD closure).
A minimally invasive approach, usually performed as a day-case procedure or with a short overnight stay.
Risks of Closure
Bleeding or bruising at the catheter insertion site.
Temporary abnormal heart rhythms.
Device-related complications (rare and usually manageable).
A very small risk of stroke or heart attack during the procedure.
Surgery Informatation
TIME IN THEATRE
30 - 60 mins
HOSPITAL STAY
Day Case / 1 Night
RETURN TO WORK
7 Days
RECOVERY TIME
3 - 7 Days
FOLLOW UP
4 Weeks with standard echo 6 Months with bubble echo
frequently asked questions
How long is the recovery after PFO or ASD closure?
Recovery is usually quick. Most patients return to normal daily activities within a few days, with light activity recommended initially. Your cardiologist will provide personalised guidance on exercise, work, and any short-term medication required while the heart heals.
How do I know if closure is right for me?
Not everyone with a PFO or ASD requires treatment. At Heart Doc, we carry out a thorough assessment, including imaging and a detailed review of your symptoms and medical history. Closure is only recommended if the potential benefits clearly outweigh the risks for your individual situation.
Will I need surgery to close a PFO or ASD?
No. PFO and ASD closure is performed using a minimally invasive catheter-based technique, meaning there is no need for open-heart surgery. The procedure is carried out through a vein in the groin and most patients are able to go home the same day or after an overnight stay.
Get in Touch
Your heart health matters — and we’re here to help. Whether you have a specific concern, wish to arrange a consultation, or simply want expert guidance, our friendly team at Heart Doc is ready to assist.
You can contact us to book an appointment, discuss our services, or request further information about your condition or treatment options. We aim to make every step of your journey as straightforward and reassuring as possible.