A method to collect cardiovascular data relating to an individual user (U), in a system comprising an acoustic sensor (4) configured to be coupled to the chest of the user, an arm band (2) having an inflatable bladder (53) configured to be placed around at a predefined position around a upper limb of the user, for example the left arm (BG), a pneumatic unit with at least a pump (7) and a pressure sensor (61), configured to inflate and deflate the inflatable bladder, an arterial blood path (P) being defined from the heart to the left arm (BG) of the user, the method comprising a set of steps named PTT procedure :/A1/- acquiring acoustic signals at the acoustic sensor,/A2/- acquiring pressure signals at the pressure sensor, image of pressure occurring at the brachial artery,/SO/ - inflate the bladder at a predetermined pressure (PT1)/S1/- determining aortic valve closing instant T1(k) from acoustic signals,/S2/- determining subsequently, from pressure signals, a characteristic point (M2) of the pressure signal curve occurring at instant T2(k),/S3/- calculate a time difference, defined as ΔT(k) = T2(k) - T1(k)Repeating, for each heartbeat, steps S1 to S3 until a stop criterion (SC) is met.
