I was reviewing some cardiac phys, and I am having trouble with how sympathetics increase venous volume / tone so as to increase the mean systemic pressure. This is seen on p. 269 of FA 2014.
I was under the impression that the main effect of sympathetics would be to decrease total peripheral resistance (dilating arterioles), which would keep the mean systemic pressure the same (as in the example of exercise).
Can anyone explain how sympathetics affect the vascular function curve? Thanks.
I was under the impression that the main effect of sympathetics would be to decrease total peripheral resistance (dilating arterioles), which would keep the mean systemic pressure the same (as in the example of exercise).
Can anyone explain how sympathetics affect the vascular function curve? Thanks.