Minimally invasive approach for redo mitral valve surgery.

Area of Science:

• Cardiovascular Surgery
• Minimally Invasive Cardiac Surgery
• Valvular Heart Disease

Background:

• Redo cardiac surgery, particularly mitral valve re-operations, presents significant challenges including higher morbidity and mortality risks.
• Complex patient factors like patent grafts, previous aortic valve replacement, and adhesions increase operative difficulty and risk of complications during sternotomy.

Purpose of the Study:

• To review minimally invasive approaches for redo mitral valve surgery.
• To discuss indications, techniques, outcomes, and controversies associated with these less invasive methods.

Main Methods:

• A systematic literature review was conducted using MEDLINE, combining terms 'mitral valve', 'minimally invasive', 'reoperation', and 'alternative approach'.
• The search focused on papers published within the last ten years, identifying ten key studies for analysis.

Main Results:

• Minimally invasive redo mitral valve surgery through a right mini-thoracotomy (port access) is safe and effective.
• This approach avoids sternal re-entry, reduces dissection of adhesions, and minimizes risks to cardiac structures and grafts, achieving good valve repair rates with low mortality and complications.
• Unclamped aorta techniques may combine minimally invasive benefits with continuous perfusion.

Conclusions:

• Minimally invasive right mini-thoracotomy is a feasible and effective alternative for redo mitral valve surgery.
• While randomized trials are lacking, current evidence suggests favorable outcomes compared to open reoperations.
• Trans-catheter techniques represent a potential future evolution for mitral reoperations.