Patent ID: 8377115

Claim:
A valve prosthesis comprising: a valve scaffold having a coil shape of consecutive windings with open spaces therebetween, wherein the valve scaffold is formed from a first material selected from one of a shape memory material and a resilient material; and a backflow barrier that is a flap of a second material attached along a first edge to the valve scaffold and having an opposing second edge free of the valve scaffold, the second material being different from the first material, wherein the valve prosthesis is operable to alternate between an open configuration wherein the consecutive windings of the valve scaffold form a frustoconical coil shape and the backflow barrier allows blood flow through the open spaces between consecutive windings of the valve scaffold, and a closed configuration wherein the consecutive windings of the valve scaffold are collapsed such that the valve prosthesis has a substantially flat profile and the backflow barrier covers the open spaces of the collapsed valve scaffold to prevent blood flow through the valve prosthesis.