How sympathetic activity inc venous return?

[Anand999]

Can anyone explain-

How sympathetic activity increases venous return?

[mrwonderful]

Sympathetics --> Increased contractility of heart --> increased preload

[drEti]

Originally Posted by mrwonderful

Sympathetics --> Increased contractility of heart --> increased preload

U r missing some steps there:
Incr Contractility --> Decreased telesystolic pressure in the ventricle (as most of the blood leaves the chamber) will facilitate the blood pass from A-V but this is a minor mechanism.
The most important one is the venous constriction. That increases preload (Doesn't let the blood pool in the periphery)