Aortic root enlargement technique allows surgeons to implant heart valves at least two sizes larger
When replacing the aortic valve, a small aortic root can limit the size of the prosthetic valve that can be implanted. If the new valve is too small in relation to the patient's body, the heart must continue to work against increased resistance—a so-called patient-prosthesis mismatch, which is associated with poorer clinical outcomes.
A new surgical technique developed at the University of Vienna's Medical University and University Hospital allows for the dilation of the aortic root, enabling the implantation of significantly larger heart valves. This technique addresses the issue of patient-prosthesis mismatch, where a small aortic root limits the size of the prosthetic valve and forces the heart to work against increased resistance.
By enlarging the aortic root, larger prosthetic valves can be implanted, improving blood flow and providing better options for future treatment. The method, named the "Alfred Kocher technique," is minimally invasive and can be performed using conventional or endoscopic access. It begins like a conventional aortic valve replacement, with the aortic annulus measured to determine if enlargement is necessary.
A specially shaped patch is then used to dilate the aortic root, allowing for the implantation of prosthetic valves that are at least two sizes larger than previously possible. This technique represents a significant advancement in the field of cardiac surgery, offering improved outcomes and long-term management for patients.
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