A blood filter for filtering blood entering an artery from the aorta, comprising: a body defining a curved cylinder about a curved body axis, including: an anchor portion defining a flow outlet port at a first end of said body, said anchor portion being adapted to route the blood flow through said flow outlet port in a first direction, wherein said anchor portion is adapted to be inserted into the ostium of the artery; and a filter portion that extends from said anchor portion and includes an elbow-shaped portion that extends lateral to said anchor portion and an extension portion that extends from said elbow-shaped portion, wherein said filter portion is adapted to protrude into the lumen of the aorta, said anchor and filter portions (42, 110) including porous walls that define a first porosity and a second porosity, said first porosity defining a first average pore size, said second porosity defining a second average pore size, said second average pore size being less than said first average pore size, said porous wall of said filter portion being adapted to receive said flow from a second direction that is substantially normal to said first direction, said extension portion defining a second end of said body, said second end defining a bypass aperture that is adapted to face in a downstream direction of the blood-flow in the aorta, wherein a superior face of said extension portion is adjacent to a downstream-oriented surface of said anchor portion along the curved body axis, said superior face and said downstream-oriented face define said first porosity, an upstream-oriented face opposite said downstream-oriented surface of said anchor portion is axially adjacent to an inferior face opposite said superior face of said filter portion, and said inferior face and said upstream-oriented face define said second porosity. a body defining a curved cylinder about a curved body axis, including: an anchor portion defining a flow outlet port at a first end of said body, said anchor portion being adapted to route the blood flow through said flow outlet port in a first direction, wherein said anchor portion is adapted to be inserted into the ostium of the artery; and a filter portion that extends from said anchor portion and includes an elbow-shaped portion that extends lateral to said anchor portion and an extension portion that extends from said elbow-shaped portion, an anchor portion defining a flow outlet port at a first end of said body, said anchor portion being adapted to route the blood flow through said flow outlet port in a first direction, wherein said anchor portion is adapted to be inserted into the ostium of the artery; and a filter portion that extends from said anchor portion and includes an elbow-shaped portion that extends lateral to said anchor portion and an extension portion that extends from said elbow-shaped portion, wherein said filter portion is adapted to protrude into the lumen of the aorta, said anchor and filter portions (42, 110) including porous walls that define a first porosity and a second porosity, said first porosity defining a first average pore size, said second porosity defining a second average pore size, said second average pore size being less than said first average pore size, said porous wall of said filter portion being adapted to receive said flow from a second direction that is substantially normal to said first direction, said extension portion defining a second end of said body, said second end defining a bypass aperture that is adapted to face in a downstream direction of the blood-flow in the aorta, wherein a superior face of said extension portion is adjacent to a downstream-oriented surface of said anchor portion along the curved body axis, said superior face and said downstream-oriented face define said first porosity, an upstream-oriented face opposite said downstream-oriented surface of said anchor portion is axially adjacent to an inferior face opposite said superior face of said filter portion, and said inferior face and said upstream-oriented face define said second porosity.