Abstract: A device for transcatheter insertion into the aortic root at the sinotubular junction by a wire guide and a catheter for protecting surrounding tissues, the device including an assembly serving as a valvular embolic filter, configured to slide in a guided manner inside the catheter, the assembly configured to form, in the aortic root of an aorta, a safety enclosure ensuring a valve function and a protective function against embolic accidents, wherein the assembly includes, a tubular body, and a filtration and valve part configured to deploy outside the catheter or retract inside the catheter, wherein the tubular body is secured, at one end, to the filtration and valve part, wherein the filtration and valve part forms the valvular embolic filter and a temporary valve, wherein the filtration and valve part is configured to prevent regurgitation of blood when deployed outside the catheter for covering a native aortic valve with a seat secured in the aortic root at sinuses of valsalva without obstructing a blood