A paravalvular occlusion apparatus, comprising: a catheter (102, 602) comprising: a main body (104, 604) having a proximal end (108, 608) and a distal end (110, 610); a visualization element disposed in the distal end (110, 610) of the main body (104, 604); a working channel (112, 612) extending from the distal end (110, 610) of the main body (104, 604); and an elongate shaft extendable from the working channel (112, 612); and an occlusion device (120, 420, 520) coupled to the elongate shaft, wherein the occlusion device (120, 420, 520) comprises: a leading end (124, 424) including a first section (128, 428, 528); and a trailing end (130, 430) opposite the leading end (124, 424), the trailing end (130, 430) including a second section (134, 434, 534), wherein the first section (128, 428) and the second section (134, 434, 534) are operable to be positioned along a perimeter of an artificial valve, characterised in that a shape of the first section (128, 428, 528) of the occlusion device (120, 420, 520) is different than a shape of the second section (134, 434, 534) of the occlusion device (120, 420, 520), wherein the first section (128, 428, 528) of the occlusion device (120, 420, 520) has an interior concave surface operable to abut an exterior surface of a stent of the artificial valve. a main body (104, 604) having a proximal end (108, 608) and a distal end (110, 610); a visualization element disposed in the distal end (110, 610) of the main body (104, 604); a working channel (112, 612) extending from the distal end (110, 610) of the main body (104, 604); and an elongate shaft extendable from the working channel (112, 612); and an occlusion device (120, 420, 520) coupled to the elongate shaft, wherein the occlusion device (120, 420, 520) comprises: a leading end (124, 424) including a first section (128, 428, 528); and a trailing end (130, 430) opposite the leading end (124, 424), the trailing end (130, 430) including a second section (134, 434, 534), wherein the first section (128, 428) and the second section (134, 434, 534) are operable to be positioned along a perimeter of an artificial valve, characterised in that a shape of the first section (128, 428, 528) of the occlusion device (120, 420, 520) is different than a shape of the second section (134, 434, 534) of the occlusion device (120, 420, 520), wherein the first section (128, 428, 528) of the occlusion device (120, 420, 520) has an interior concave surface operable to abut an exterior surface of a stent of the artificial valve. a leading end (124, 424) including a first section (128, 428, 528); and a trailing end (130, 430) opposite the leading end (124, 424), the trailing end (130, 430) including a second section (134, 434, 534), wherein the first section (128, 428) and the second section (134, 434, 534) are operable to be positioned along a perimeter of an artificial valve, characterised in that a shape of the first section (128, 428, 528) of the occlusion device (120, 420, 520) is different than a shape of the second section (134, 434, 534) of the occlusion device (120, 420, 520), wherein the first section (128, 428, 528) of the occlusion device (120, 420, 520) has an interior concave surface operable to abut an exterior surface of a stent of the artificial valve.