Vascular prosthesis

A replacement vascular prosthesis for connection to a natural cardiovascular system for replacement or circumvention in the form of a bypass of a portion of the aorta, the vascular prosthesis comprising a textile tube forming a volume chamber, the textile tube having opposite ends adapted to be connected in the cardiovascular system to replace or circumvent a portion of the aorta without being inserted within a vessel of the cardiovascular system, and the textile tube formed from an elastic yarn having a non-biodegradable core made from silicone yarn around which a non-biodegradable yarn made from polyethylene terephthalate (PET) is wrapped, wherein weft threads of the volume chamber are formed from the elastic yarn, and wherein warp threads of the volume chamber are formed from PET yarn, which results in the volume chamber emulating the Windkessel function of the aorta, such that the volume chamber has, in a blood pressure range below a pressure threshold value D, a pressure-expansion behavior substantially corresponding to the pressure-expansion behavior of a natural blood vessel, while the volume of the volume chamber, depending on the pressure, increases by at least 10 cm3 in a blood pressure range above the pressure threshold value D.