How can I quickly extract values from key-value pair vector in R?

Question

I am new in R and I have some problems. I have key-value pair vector kv_vect which contains lots of pairs:

> length(kv_vect)
[1] 296538
> head(kv_vect, 5)
[[1]]
[1] 3209

[[2]]
[1] 234

[[3]]
[1] 755

[[4]]
[1] 3

[[5]]
[1] 46

How can I quickly extract values (without keys) from kv_vect?

I just try to do this:

listVal<-c()
for (val in kv_vect) {
  listVal<-c(listVal,val)
}

but it works too long.