What is the equation connecting systolic pressure to pulse rate?
The equation you seek relating pulse rate (N) to Systolic pressure (Ps) is: Ps = (N x Pp x C x R) + (CO/N.C) where C is aortal wall compliance, Pp the pulse pressure, R being the total resistance presented to the flow of blood (by the vasculature extending from the aortic valve to the venous pool), and CO of course, is cardiac output. Orthodox textbooks will (quite wrongly) contend that the 1st term on the RH side of the equation should read {N.Pp.C.R – Pp/3} but this is quite incorrect, because the pulse pressure wave does no work, (apart from losses) and therefore plays no part in the driving of blood round the loop.. But it doesn’t really matter anyway, because the equation works in any case, -with or without the ” -Pp/3″. EDIT: Eltombar, your definition of Mean Arterial Pressure is quite the oddest I’ve encountered. Central venous pressure, although small and finite, is virtually atmospheric pressure. Most texts define MAP as Pd + Pp/3? What is your source for your definition? EDIT
