1,721,333 research outputs found
Coronary button dehiscence after the modified Bentall procedure
No full textThe modified Bentall procedure (MBP), after over 50 years from its introduction, still represents an extremely valid option in patients with aortic valve disease and aneurysms of the ascending aorta or the aortic root. Late complications following MBP are substantially rare but whenever they occur they represent a real surgical challenge. For this reason, we were very interested in reading the article by Comentale et al. published in the Journal of Cardiac Surgery. The authors report a patient who developed after 18 months a giant pseudoaneurysm of the right coronary button which was repaired successfully
Ultrastructural substrates of dystrophic calcification in porcine bioprosthetic valve failure. Am J Pathol 119:12-21, 1985 (M. Valente, U. Bortolotti, G. Thiene) (IF,2000: 6.971)
No full textCalcific degeneration is the main cause of porcine bioprosthetic valve failure. This dystrophic phenomenon has been studied by transmission electron microscopy in 26 explants; six normally processed unimplanted xenografts and a pig aortic valve from the slaughterhouse served as controls. Loss of endothelial lining and proteoglycans were a regular finding in all the commercially processed valves. In order to detect initial calcifications, we investigated in particular areas apparently devoid of mineralization at x-ray. Three main ultramicroscopic features were found: 1) intracytoplasmic and interstitial calcospherulae in 22 explants, 2) calcified collagen fibrils in 15, and 3) platelike calcium deposits upon amorphous material in 3. X-ray diffraction and energy-dispersive microanalysis identified Ca2+ deposits as crystals of hydroxyapatite. From these findings there is evidence that debris and membrane fragments of the pig cusp cells represent one of the initial nuclei of calcification
The Cabrol technique for replacement of the aortic valve and totally calcified ascending aorta: a case report
No full textEnlargement of the Aortic Annulus During Aortic Valve Replacement: Just a Matter of Terminology?
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Transmyocardial laser revascularization using a thoracoscopic approach
No full textTransmyocardial revascularization is a new technique aimed to improve perfusion of the ischemic myocardium by creating transmyocardial channels with a laser. This report demonstrates that transmyocardial revascularization with a holmium laser can be performed through a thoracoscopic approach
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