Introduction
Traditional open-heart surgery is done through a long cut and by dividing the whole breastbone (full sternotomy). In mini sternotomy, the surgeon makes a smaller incision and divides only part of the breastbone to reach the heart.
Other minimally invasive approaches reach the valve through small cuts between the ribs. These approaches may be used to repair or replace heart valves, most commonly the aortic or mitral valve.
Why the procedure is needed
These approaches treat the same valve problems as standard valve surgery, which may cause:
- Breathlessness and tiredness
- Chest pain, dizziness or fainting
- Swelling of the feet
- Palpitations and irregular heartbeat
- Heart enlargement and heart failure if left untreated
Who may benefit
- Patients who need aortic or mitral valve repair or replacement and whose anatomy suits a smaller incision
- Patients who value a smaller scar and, potentially, a quicker recovery, and are suitable after assessment
- Patients treated by a team that has experience with minimally invasive techniques
- May not be suitable for people who need several operations at once, have complicated heart anatomy, severe lung disease, certain blood-vessel problems or previous chest surgery
What makes it different
- Smaller incision
- A shorter cut, and only the upper or lower part of the breastbone divided (partial sternotomy), or small cuts between the ribs.
- Valve repair or replacement
- The same valve operations as in full surgery can be done — repair techniques or mechanical or biological replacement — but not every valve problem can be treated this way.
- Potential recovery benefits
- Some patients may have less pain, less blood loss, a smaller scar and a quicker return to activity, though results vary and not all studies show a clear difference.
- Limitations
- The surgeon has less room to work, the operation may take longer, and not every patient or valve is suitable. The surgeon may convert to a full sternotomy for safety.
- Surgeon and centre experience
- Results depend on the experience of the surgical team, so ask about their experience with this approach.
Procedure overview
Step 1: Assessment
Echocardiography, CT scanning and angiography show your valve, heart and blood vessels and whether a minimally invasive approach is suitable.
Step 2: Anaesthesia
General anaesthesia is used, with detailed monitoring.
Step 3: Smaller surgical access
A smaller incision is made, and part of the breastbone is divided, or small cuts are made between the ribs. Circulation is supported by the heart-lung machine, often connected through blood vessels in the groin or chest.
Step 4: Valve repair or replacement
The surgeon repairs or replaces the diseased valve using specially designed instruments, sometimes with camera assistance.
Step 5: Checking and closing
The valve is checked, the heart is restarted, and the incision is closed with attention to a neat scar.
Step 6: Recovery
Monitoring in intensive care is followed by ward care and rehabilitation. Some patients leave hospital and resume activities sooner than after full sternotomy, but this varies.
Clinical advantages
- A smaller scar and less cutting of the breastbone
- May mean less pain and less blood loss in some patients
- May allow a quicker return to normal activity for some patients
- Same valve repair or replacement options as standard surgery, in suitable patients
Risks and considerations
Every operation carries risk. The points below are general; your own risk depends on your health and on the operation you need.
- General risks of open-heart surgery: bleeding, infection, rhythm problems, stroke and kidney problems
- Operation time may be longer, and the surgeon has less space to work
- Conversion to a full sternotomy may be needed during the operation for safety
- Problems related to how the heart-lung machine is connected, such as groin vessel or wound problems
- Not every patient or valve problem is suitable, and the benefits over standard surgery are not proven for everyone
Frequently asked questions
Is minimally invasive surgery safer than standard surgery?
Not necessarily. It may mean a smaller scar and, for some patients, a quicker recovery, but the safety and the quality of the valve repair or replacement are what matter most. Results depend on the patient and the surgical team.
Is it "keyhole" surgery with no big cut?
No. It is still open-heart surgery, but through a smaller incision and with part of the breastbone divided or small cuts between the ribs.
Can everyone have it?
No. Your anatomy, the type of valve problem, previous surgery and other illnesses decide whether a smaller-incision approach is suitable.
Will my recovery be faster?
Some patients recover faster and have less pain, but this is not guaranteed. Recovery depends on you and on the operation.
What if the surgeon cannot finish the operation through the small incision?
The surgeon may convert to a full sternotomy for your safety. You will be asked to consent to this possibility before surgery.
Patient-friendly summary
Mini sternotomy and other minimally invasive valve operations reach the heart through smaller incisions. For suitable patients, treated by an experienced team, they can mean a smaller scar and sometimes a quicker recovery, but they are not suitable for everyone, and safe, effective valve treatment comes first. Ask a cardiothoracic surgeon whether this approach is an option for you.