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MECHANICAL VALVE HISTORY –“MEDTRONIC” TELECONFERENCE PRESENTATION
Author(s) -
Campbell A.
Publication year - 2007
Publication title -
anz journal of surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 70
eISSN - 1445-2197
pISSN - 1445-1433
DOI - 10.1111/j.1445-2197.2007.04115_27.x
Subject(s) - medicine , ball valve , mechanical heart , presentation (obstetrics) , artificial heart , aortic valve , cardiology , bicuspid aortic valve , stenosis , descending aorta , hemodynamics , aorta , surgery , mechanical engineering , engineering
Charles Hufnagel began the era of artificial heart valve implantation in 1952, before the existence of technology that allowed the heart to be arrested. Hufnagel implanted a Lucite tube and ball in the descending aorta with clamps that facilitated rapid insertion without arresting the heart. Although valves in the descending aorta were somewhat successful in the management of aortic insufficiency, only a device placed in the appropriate anatomical or orthotopic position could help patients with valvular stenosis. This presentation will review the development of mechanical heart, emphasizing changes in valve design resulting from our greater understanding of blood hemodynamics, the mechanical forces imposed on valve components, and the interaction of artificial materials with components of circulating blood. The evolution from polymer to metal and finally the dominance of pyrolitic carbon as the material of choice will be explored. Similarities and differences between the four bileaflet valves that have received FDA approval and the two valves with CE mark approval that have not yet received FDA approval will be discussed.