An angiographic catheter (10) for the measurement of the transmission speed of the arterial pressure wave inside a blood vessel, as for example an artery and in particular an artery aorta, which comprises a first tubular element (20) provided with a first lumen (22) and a second tubular element (30) provided with a second lumen (32), the first tubular element (20) and the second tubular element (30) being realized from a flexible polymeric material and said second tubular element (30) further being partially inserted and sliding inside the first lumen (22) of the first tubular element (20), the first lumen (22) comprising a first proximal aperture (23), which can be connected with a first pressure transducer capable to detect a first arterial pressure wave, and furthermore said second lumen (32) comprises a second proximal aperture (33), which can be connected with a second pressure transducer capable to directly detect a second arterial pressure wave, the second tubular element (30) comprising a graduated scale (37) which is realized on an external surface of said second tubular element (30) on a proximal portion (36) of the same, said graduated scale (37) partially externally protruding with respect to said first tubular element (20) and so permitting to directly read anytime the real exact distance between said second distal aperture (35) and said first distal aperture (25) along said blood vessel.
