Medtronic received information that approximately one year following the implant of this transcatheter pulmonary bioprosthetic valve, the patient's mean pulmonary valve gradient was 46 millimeters of mercury (mmhg) which was an increase from 28 mmhg noted six months prior.
An echocardiogram was performed and showed no pulmonary regurgitation or paravalvular leak.
Stenosis with concentric narrowing of the midportion of the valve frame, prominent neointimal hyperplasia or pannus formation extending from the right ventricular outflow tract and encompassing the prosthetic valve leaflets was confirmed with computed tomography (ct).
Approximately, one year and two months post valve implant a dilation with a 28 millimeter non-medtronic balloon followed by the implant of a second non-medtronic transcatheter pulmonary valve was performed.
The post-intervention right ventricle to pulmonary artery (rv-pa) peak-to-peak gradient was 3 millimeters of mercury (mmhg).
No additional adverse patient effects were reported.
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Product analysis: the device remains implanted, therefore no product analysis can be performed.
Conclusion: without return of the product, no definitive conclusions could be drawn regarding the clinical observation.
If information is provided in the future, a supplemental report will be issued.
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