A catheter device comprising; an elongate sheath with a lumen and a distal end for positioning at a heart valve, an embolic protection device for temporarily positioning in the aortic arch for deflection of embolic debris from the ascending aorta to the descending aorta, said embolic protection device is connectable to a proximal transluminal delivery unit, and having: a frame with a periphery, a blood permeable unit within said periphery configured to prevent embolic particles from passing therethrough with a blood flow downstream an aortic valve into side vessels of said aortic arch to the brain of a patient, and at least one tissue apposition sustaining unit extending from said catheter, into said aortic arch, and being attached to said embolic protection device at a sustaining point, for application of a stabilization force offset to said connection point at said embolic protection device, such as at said periphery, and for providing said stabilization force towards an inner wall of said aortic arch, away from said heart, and in a direction perpendicular to a longitudinal extension of said periphery, when said catheter device is positioned in said aortic arch, such that tissue apposition of said periphery to an inner wall of said aortic arch is supported by said force for improving stability and peripheral sealing, wherein said tissue apposition sustaining unit comprises a pushing unit, and said force includes a pushing force, against said frame, periphery and/or blood permeable unit, for providing said pushing force and pressing said periphery to said inner wall, wherein said pushing unit comprises a distal guide element connected between said sustaining point of said embolic protection device and a distal connection point on said catheter, and wherein said distal guide element has a delivery state in which said embolic protection device is collapsed and substantially conforms to the sheath of said catheter, and a deployed state in which said embolic protection device is expanded whereby said periphery is substantially in said apposition with the inner wall of the aortic arch, whereby said distal guide element is configured to guide said embolic protection device towards said inner wall when moving from said delivery state to said deployed state, characterized in that said catheter device comprising an opening through which said embolic protection device is deployable, and wherein said opening extends substantially along the length of said embolic protection device in the longitudinal direction of said sheath. a frame with a periphery, a blood permeable unit within said periphery configured to prevent embolic particles from passing therethrough with a blood flow downstream an aortic valve into side vessels of said aortic arch to the brain of a patient, and at least one tissue apposition sustaining unit extending from said catheter, into said aortic arch, and being attached to said embolic protection device at a sustaining point, for application of a stabilization force offset to said connection point at said embolic protection device, such as at said periphery, and for providing said stabilization force towards an inner wall of said aortic arch, away from said heart, and in a direction perpendicular to a longitudinal extension of said periphery, when said catheter device is positioned in said aortic arch, such that tissue apposition of said periphery to an inner wall of said aortic arch is supported by said force for improving stability and peripheral sealing,