Keywords
Bioprosthetic valves; Support system; Durability test
Abstract
Background: Continuous improvement in the mechanics, preservation and anticalcification treatment made bioprostheses the standard mode of valve replacement in the aging population. A novel Support System with large openings at the Commissural posts has been developed and the performance and durability of bioprostheses constructed went under evaluation.
Methods: This stent was used to create Three trileaflet composite porcine valves of 23mm (titanium), 27mm and 31mm (POM-C) in diameter were constructed. and one 25mm (titanium) bovine pericardial valve. All valves were tested in a heart valve duplicator system. The porcine valves underwent fatigue accelerating testing.
Results: For the porcine valves the peak pressure was measured as 12.5mmHg, 9.1 mmHg and 7.3mmHg for the 23mm, 27mm and for the 31mm valve respectively and the valve area were 2.5 cm², 2.6 cm² and 2.7 cm² respectively. The 25mm pericardial valve showed a peak pressure of 5.5mmHg and a valve area of 3.1 cm². The durability test showed deterioration after 225x106cycles for the 23mm, 265x106 cycles for the 27mm and 240x106 cycles for the 31 mm.
Conclusion: This novel stent for bioprosthetic valves offers excellent hydrodynamic performance for a variety of biological issues tested and above the standards durability.
Citation
Agathos EA. Bioprosthetic Valves with a Novel Support System with Heart Shape Commissural Posts. SM J Cardiolog and Cardiovasc Disord. 2015; 1(1): 1002.