It is interesting to not the state of those
who have been martyred.

Death is never then end of existence.
The saints that have been killed during
the Tribulation are under the altar, it is
more than likely
paradise or the
Third Heaven.
(2 Corinthians
12:1-4)

It is not as high a
heaven as the one
where God's throne
and the heavenly
temple is,

as expressed 'under the altar', but it is
close enough for those who are there
to be in the presence of God. "Absent
from the body, present with the Lord."
2 Corinthians 5:8