Device and method for treatment of heart valve regurgitation

A - Human Necessities – 61 – F

Patent

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A61F 2/24 (2006.01)

Patent

CA 2580053

The prosthesis (100) includes a pocket (106) formed from flexible material (104) disposed on a ring (102). When properly oriented in a mitral valve (120) of a heart (124), the pocket (106) expands as the mitral valve closes, blocking any openings between the mitral valve leaflets (122). During systole, backpressure from the blood in the left ventricle (128) presses against the mitral valve leaflets (122), as the papillary muscles move these leaflets (122) to a closed position. The mitral valve leaflets (124) coapt against the expanded pocket (106), minimizing or even eliminating gaps that would otherwise be present between the two leaflets (122).

L'invention porte dans une exécution sur une prothèse cardiaque permettant de fermer au moins en partie l'intervalle compris entre les deux feuillets de la valvule mitrale. Dans l'exécution préférée, la prothèse comporte un anneau d'ancrage placé dans l'oreillette gauche la fixant à une poche à l'anneau d'ancrage, ladite poche se trouvant dans la valvule mitrale entre ses feuillets, et l'extrémité ouverte de la poche se trouvant dans l'oreillette gauche. Lorsque la valvule mitrale est ouverte, le sang contourne la poche et la maintient à l'état affaissé. Lorsque la valvule mitrale est fermée, la contre pression du sang s'exerce dans la poche et la gonfle, et les feuillets de la valvule mitrale entrent en contact avec la poche gonflée, ce qui permet à la prothèse de fermer au moins une partie de l'ouverture comprise entre les feuillets, limitant ainsi le flux de sang de régurgitation pénétrant dans l'oreillette gauche.

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