<P> AV conduction during normal cardiac rhythm occurs through two different pathways: </P> <Ul> <Li> the first "pathway" has a slow conduction velocity but shorter refractory period </Li> <Li> the second "pathway" has a faster conduction velocity but longer refractory period . </Li> </Ul> <Li> the first "pathway" has a slow conduction velocity but shorter refractory period </Li> <Li> the second "pathway" has a faster conduction velocity but longer refractory period . </Li>

What is the purpose of the av node