The example shown by Vaisnavas at the time of death is that perfection is to be able to remember the Supreme Lord. The Lord is very merciful upon the conditioned soul. Even though one may not be fully situated in complete Krishna consciousness at the time of death, if the devotee is endeavoring to meditate on the Lord, then whatever lack there is, the Lord will give to that devotee. Prabhupada always said that if we take one step towards Krishna, Krishna will take one hundred steps towards us. Krishna will appear in our minds even if we cannot fully remember Him. The secret is constant endeavor.
LFD Vol 3,Proper Use of this Life, Pg 115, 6 paragraph