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Updated: Jul 19, 2026
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Automatic Surgery in Transcatheter Aortic Valve Replacement Using Augmented Reality
Published on: August 9, 2024
Real-time interactive MRI-guided cardiac surgery: aortic valve replacement using a direct apical approach
Elliot R McVeigh1, Michael A Guttman, Robert J Lederman
1Laboratory of Cardiac Energetics, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-1061, USA. mcveigh@nih.gov
Magnetic Resonance in Medicine
|October 13, 2006
Summary
This study shows real-time MRI can guide prosthetic aortic valve replacement in beating hearts through minimally invasive surgery. This novel technique offers a potentially less invasive and more effective treatment for heart valve disease.
Area of Science:
- Cardiovascular Surgery
- Medical Imaging
- Biomedical Engineering
Background:
- Minimally invasive cardiac surgery is challenged by the need to arrest and empty the heart, impairing surgical field visualization.
- Current procedures for aortic valve replacement often require cardiopulmonary bypass, increasing patient morbidity.
Purpose of the Study:
- To demonstrate the feasibility of using real-time magnetic resonance imaging (MRI) to guide prosthetic aortic valve implantation in a beating heart.
- To assess a novel minimally invasive surgical approach for aortic valve replacement via direct apical access.
Main Methods:
- A stentless bioprosthetic aortic valve attached to a platinum stent was compressed onto a catheter.
- The device was delivered through a 15-18 mm port in the left ventricular (LV) apex via a subxyphoid incision.
- Real-time MRI was used interactively to guide valve placement at the aortic annulus in eight porcine hearts.
Main Results:
- The prosthetic aortic valve was successfully implanted in the correct anatomical position within 90 seconds in all subjects.
- Post-implantation MRI evaluated ventricular function, blood flow dynamics through the new valve, and myocardial perfusion.
- The procedure demonstrated successful real-time MRI guidance for beating-heart valve replacement.
Conclusions:
- MRI-guided beating-heart surgery represents a feasible and novel approach for aortic valve replacement.
- This technique may offer a less morbid and potentially more durable solution for patients with structural heart disease.
- Real-time MRI guidance enhances precision in minimally invasive cardiac procedures.
