Late actress Florence Henderson poses at the Television Academy's Performers Peer Group cocktail reception to celebrate the 66th Primetime Emmy Awards in Beverly Hills, California, July 28, 2014. REUTERS/Danny Moloshok/File Photo

Florence Henderson, who died Nov. 24 from a heart attack, had been battling serious heart issues, according to her official death certificate. "The Brady Bunch" actress reportedly suffered from heart disease for 10 years.

The document, which was obtained by Entertainment Tonight, revealed Henderson suffered from atrial fibrillation, also referred to as an irregular heartbeat, for the past 5 years.

Best known for playing the character of Carol Brady on the popular ABC sitcom from 1969 to 1974, Henderson died at the Cedars-Sinai Medical Center in California on Thanksgiving Day aged 82.

Earlier this year, Henderson recorded a video for Go Red for Women — the American Heart Association's campaign — to raise awareness about heart disease and strokes among women. In the clip, the star talked about her own ongoing battle with heart problems.

"I knew as a child that I had a heart murmur," Henderson shared in the clip. "And as I got older, I was experiencing more irregular heartbeats. So finally, I went to a cardiologist about eight years ago and I was in really bad shape."

The actress added: "I urge women to have your heart checked. Go to a cardiologist. If I can help one person and save one person's life, then I'm thrilled."

Henderson appeared on “Dancing with the Stars” in 2010, and just a few days prior to her death she returned to the ABC reality show to support Maureen McCormick, who was a contestant on Season 23. McCormick played the role of Marcia Brady on “The Brady Bunch.”

"Florence Henderson was a dear friend for so very many years & in my <3 forever. Love & hugs to her family. I'll miss u dearly," McCormick wrote on her Twitter account the day Henderson died.