An asymmetric external support (100; 200) for stabilizing a vein graft used in a coronary arterial bypass graft procedure, the asymmetric external support (100; 200) comprising: a tubular wire mesh (100; 200) longitudinally extending proximally and distally with wire mesh proximal (100pp; 200pp), middle (100mp; 200mp), and distal portions (100dp; 200dp), and, wire mesh proximal (100pe; 200pe) and distal (100de; 200de) ends, said wire mesh (100; 200) is configured with non-paired elastic wires (102; 202) and paired plastically deformable wires (104; 204); said non-paired elastic wires (102; 202) longitudinally extend along full longitudinal length of said wire mesh (100; 200), whereby proximal (102pe; 202pe) and distal (102de; 202de) ends of said elastic wires (102; 202) coincide with said wire mesh proximal (100pe; 200pe) and distal (100de; 200de) ends, respectively; said wire mesh proximal portion (100pp; 200pp) has proximal ends (104-1a pe, 104-1b pe, 104-2a pe, 104-2b pe; 204-1a pe, 204-1b pe, 204-2a pe, 204-2b pe) of all said paired plastically deformable wires (104; 204) being non-connected and open; the asymmetric external support (100; 200) characterised in that said wire mesh distal portion (100dp; 200dp) has said paired plastically deformable wires (104; 204) configured with inter-looped distal end portions (104-1a dep, 104-1b dep, 104-2a dep, 104-2b dep; 204-1a dep, 204-1b dep, 204-2a dep, 204-2b dep), whereby each pair of said plastically deformable wires (104; 204) has a first wire (104-1a, 104-2a; 204-1a, 204-2a) with a first wire distal end portion (104-1a dep, 104-2a dep; 204-1a dep, 204-2a dep) formed as a first wire closed loop ([1st pair, 1st loop], [2nd pair, 1st loop]) that is inter-looped with a second wire distal end portion (104-1b dep, 104-2b dep; 204-1b dep, 204-2b dep) formed as a second wire closed loop ([1st pair, 2nd loop], [2nd pair, 2nd loop]) of a second wire (104-1b, 104-2b; 204-1b, 204-2b); said paired plastically deformable wires (104; 204) longitudinally extend along less than said full longitudinal length of said wire mesh (100; 200), whereby apexes of all said inter-looped distal end portions (104-1a dep, 104-1b dep, 104-2a dep, 104-2b dep; 204-1a dep, 204-1b dep, 204-2a dep, 204-2b dep) are proximally longitudinally offset (λ) from, and not coincident with, said wire mesh distal end (100de; 200de); and wherein, in the coronary arterial bypass graft procedure, the asymmetric external support (100; 200) is externally applicable upon, to cover, the vein graft in a manner such that said wire mesh distal end (100de; 200de) is positionable at a coronary artery anastomosis site (ca-AS), and said wire mesh proximal end (100pe; 200pe) is positionable at an other anastomosis site (o-AS). a tubular wire mesh (100; 200) longitudinally extending proximally and distally with wire mesh proximal (100pp; 200pp), middle (100mp; 200mp), and distal portions (100dp; 200dp), and, wire mesh proximal (100pe; 200pe) and distal (100de; 200de) ends, said wire mesh (100; 200) is configured with non-paired elastic wires (102; 202) and paired plastically deformable wires (104; 204); said non-paired elastic wires (102; 202) longitudinally extend along full longitudinal length of said wire mesh (100; 200), whereby proximal (102pe; 202pe) and distal (102de; 202de) ends of said elastic wires (102; 202) coincide with said wire mesh proximal (100pe; 200pe) and distal (100de; 200de) ends, respectively; said wire mesh proximal portion (100pp; 200pp) has proximal ends (104-1a pe, 104-1b pe, 104-2a pe, 104-2b pe; 204-1a pe, 204-1b pe, 204-2a pe, 204-2b pe) of all said paired plastically deformable wires (104; 204) being non-connected and open; said paired plastically deformable wires (104; 204) longitudinally extend along less than said full longitudinal length of said wire mesh (100; 200), whereby apexes of all said inter-looped distal end portions (104-1a dep, 104-1b dep, 104-2a dep, 104-2b dep; 204-1a dep, 204-1b dep, 204-2a dep, 204-2b dep) are proximally longitudinally offset (λ) from, and not coincident with, said wire mesh distal end (100de; 200de); and wherein, in the coronary arterial bypass graft procedure, the asymmetric external support (100; 200) is externally applicable upon, to cover, the vein graft in a manner such that said wire mesh distal end (100de; 200de) is positionable at a coronary artery anastomosis site (ca-AS), and said wire mesh proximal end (100pe; 200pe) is positionable at an other anastomosis site (o-AS).