not realize

Under not realize my uncle had already past away for 1 week time ago.He is good and kind.Although sometimes he quarrel with his wife but i think is just for closing to each other.He died just in a sudden under no one realize.I heard from relatives they said that after work he and his colleague chat and some jokes go on.His colleague thinking of why no more sound from him and then only realize that he is death.But at that time he still have some body temperature when sent to hospital,his corpse is totally cold.They find that he's death under heart attack.When send back to his house his wife cry badly