The cardiac impulse is initiated and conducted further up to the ventricle. The correct sequence of conduction of impulses is
1
S A Node -----> A V Node ------> Purkinje fiber------> A V Bundle
2
S A Node-----> Purkinje fiber -----> A V Node-----> A V Bundle
3
S A Node -----> A V Node-----> A V Bundle-----> Purkinje fiber
4
S A Node-----> Purkinje fiber -----> A V Bundle-----> A V Node