The actress is leaving the series after playing the Walford battleaxe for 25 years and although it is as yet unknown how she will pass away, Pam insists when she goes it will have a profound effect on viewers.
She said: "The lead-up to the final hour is very powerful indeed - and I think that final hour is going to be fairly special, actually.
"It's something quite brave for EastEnders. It's intensive, it's very concentrated, and sometimes we tend to concentrate on the big, the events, the things that happen, the big geography and the big emotions - and we don't sort of go inwards as much as we used to in the early days."
Pam, 69, admits she is going to miss everyone who works on the show after spending so many years in the series, and she is expecting to "grieve" for her character in the New Year when EastEnders carries on without her.
In an interview with Digital Spy, she explained: "I am definitely going to miss the people. The cast, many of whom are friends now and will remain friends. I won't miss them because I'll see them, not on a regular basis, but I will see them.
"But I'll miss everybody in production and beyond ... But it's funny, I'm not sure (how much I'll miss Pat) until I actually put her down, which will be when my final scenes are transmitted. I don't think I can answer that until I can put the show away, which will be later in 2012, and then I shall be completely over it. Then my grieving process can start if it's going to!"
Pat's final episode transmits on New Year's Day (01.01.12) and her son David Wicks - played by actor Michael French from 1993 to 1996 - returns to Walford say his final goodbye to his mother.