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The Annals of Thoracic Surgery, Vol 24, 508-518, Copyright © 1977 by The Society of Thoracic Surgeons

ARTICLES

Bacteremia, endocarditis, and the Hancock valve

DJ Magilligan Jr, EL Quinn and JC Davila

Among 373 patients with porcine xenografts, there were 27 instances of exposure of the xenograft to bloodstream or endocardial infection in 22 patients. Nine patients underwent 10 separate insertions of xenografts for active infective endocarditis. There were no early infections or valve failures. Three patients returned with a late prosthetic valve endocarditis (PVE) due to a new infection. There were 6 instances of bacteremia early after xenograft valve insertion with no early infection, no valve dysfunction, and 1 instance of late PVE. Eleven patients had PVE on a porcine xenograft. Blood cultures in the 10 patients treated with antibiotics promptly became negative. There were 3 valve-related deaths: 2 from valve incompetence and 1 from mitral and aortic xenograft stenosis. Our experience suggests that the Hancock porcine xenograft is: (1) as resistant to infection as are rigid prostheses in active infective endocarditis; (2) resistant to early postoperative bacteremias; and (3) easier to sterilize than rigid prostheses and more durable than other tissue valves in the face of PVE.

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