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Cuspal perforations caused by long suture ends in implanted bioprosthetic valves
The Journal of Thoracic and Cardiovascular Surgery
|October 1, 1985
Summary
Excessively long suture ends in bioprosthetic cardiac valves can cause leaflet damage, leading to regurgitation. Proper surgical technique is crucial to prevent these suture-induced lesions in mitral valve replacements.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Veterinary Pathology
Background:
- Bioprosthetic cardiac valves are used to replace damaged native valves.
- Complications can arise from implanted devices, affecting patient outcomes.
- Suture material and length are critical factors in valve implantation.
Purpose of the Study:
- To describe the morphological features of lesions caused by long suture ends in bioprosthetic mitral valves.
- To investigate the mechanism of cusp damage and perforation.
- To highlight the clinical implications of these suture-induced injuries.
Main Methods:
- Gross anatomic examination of explanted valves.
- Histologic analysis of damaged valve tissue.
- Scanning electron microscopy (SEM) to visualize surface morphology.
Main Results:
- Lesions included cuspal abrasions, perforations, and tears.
- Damage resulted from contact between long suture ends and valve leaflets.
- Perforations appeared as craters, with collagen fibril disruption.
- Tears extended to the cusp free edge, causing regurgitation.
Conclusions:
- Excessively long suture ends are a direct cause of bioprosthetic valve leaflet damage.
- This damage can lead to hemodynamically significant regurgitation.
- Meticulous attention to suture length during implantation is essential to prevent complications.