Share this page on LinkedIn
Share This Page on Google+
Share This Page on Twitter
tell someone about this page print this page
You are here: Contents > 2012 > Volume 21 Number 2 March 2012 > MISCELLANEOUS > The Pathology of TRI-Tech Valve Leaflet Escape

The Pathology of TRI-Tech Valve Leaflet Escape

Mila Della Barbera, Tomaso Bottio, Annalisa Angelini, Giovanni Domenico Cresce, Massimo Montisci, Gino Gerosa, Marialuisa Valente, Gaetano Thiene

Departments of Medico-Diagnostic Sciences and Special Therapies, Cardiac Surgery and Forensic Medicine, University of Padua Medical School, Padua, Division of Cardiac Surgery, San Bortolo Hospital, Vicenza, Italy

Background and aim of the study: The study aim was to investigate leaflet escape in the TRI-Tech mechanical valve, as reported in three patients.
Methods: Among the three patients, one patient with a mitral prosthesis from which leaflet escape occurred underwent a successful reoperation. However, two patients with an aortic prosthesis from which leaflet escape occurred died suddenly. In addition, 150 unimplanted TRI-Tech valve prostheses were evaluated.
Results: Tab fracture was observed in all of the escaped leaflets, with a height asymmetry of 0.33 mm in the mitral valve, and 0.55 and 0.41 mm, respectively, in the two aortic valves. Height tab asymmetry was present in all unimplanted valves: this was <0.20 mm in 90% of valves, and >0.20 mm in 10% (in one valve the asymmetry was >0.35 mm).

Height asymmetry was greatest in valves sized 21 to 25 mm. A review of data provided by the TRI-Tech quality control unit failed to demonstrate any reference to checking for tab symmetry.
Conclusion: Significant tab malalignment was observed in the TRI-Tech valves in which tab fracture and leaflet escape had occurred. Tab asymmetry was also present in all unimplanted valves; this was >0.20 mm in 10% of units, and in one case was as high as in valves that had undergone leaflet escape. As tolerance for tab asymmetry is unknown and the risk of rupture is unpredictable, an interruption of the implant program with prophylactic replacement of the implanted TRI-Tech valves must be considered judicious.

The Journal of Heart Valve Disease 2012;21:241-246

The Pathology of TRI-Tech Valve Leaflet Escape

Click the above hyperlink to view the article, right click (Ctrl click on a Mac) to open in a new browser window or tab.

Purchase this Article

Please click the button below to purchase this article. Single article purchases are provided at $50.00 per article. Upon clicking the button below, single article user account subscription details are requested and, upon successful payment, a single article user account is created. Single articles are availble in your account for seven days after purchase.