The document, obtained by ET, reveals that the Brady Bunch star had been suffering from coronary artery disease for 10 years and atrial fibrillation -- also referred to as an irregular heartbeat -- for the past five years.
Florence Henderson is telling this weeks issue of Closer Weekly that she has a 'friends with benefits'.
FORT LAUDERDALE, FL - NOVEMBER 05: Florence Henderson and Christopher Knight attends Love Boat Cast Christening Of Regal Princess Cruise Ship at Port Everglades on November 5, 2014 in Fort Lauderdale, Florida. (Photo by Gustavo Caballero/Getty Images)
HOLLYWOOD, CA - OCTOBER 29: Actress Florence Henderson arrives at the 2014 amfAR LA Inspiration Gala at Milk Studios on October 29, 2014 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES - SEPTEMBER 29: Florence Henderson as Carol Brady in THE BRADY BUNCH episode, 'Pass The Tabu.' Original air date September 29, 1972. Image is a screen grab. (Photo by CBS via Getty Images)
LOS ANGELES - SEPTEMBER 22: The opening of THE BRADY BUNCH episode, 'Hawaii Bound.' Original air date September 22, 1972. Pictured is Florence Henderson as Carol Brady and Robert Reed as Mike Brady. Image is a screen grab. (Photo by CBS via Getty Images)
LOS ANGELES - OCTOBER 1: Robert Reed as Mike Brady, Florence Henderson as Carol Brady and Christopher Knight as Peter Brady in THE BRADY BUNCH episode, 'The Brady Braves.' Original air date October 1, 1971. Season 3, episode 3. Image is a frame grab. (Photo by CBS via Getty Images)
THE BRADY BUNCH VARIETY HOUR - Airdate during November 1976- May 1977. (Photo by ABC Photo Archives/ABC via Getty Images) FLORENCE HENDERSON;ROBERT REED
LOVE BOAT - 'The Captain's Ne'er-do-well Brother/The Perfect Match/The Remake' which aired on February 2, 1980. (Photo by ABC Photo Archives/ABC via Getty Images) JAMES BRODERICK;FLORENCE HENDERSON
THE BRADY BUNCH - US TV series 1969-74 with principals Robert Reed and Florence Henderson
THE BRADY BUNCH - US TV series 1969-74 with Robert Reed and Florence Henderson
CENTURY CITY, CA - NOVEMBER 08: Actress Florence Henderson attends the 45th Anniversary Gala Vanguard Awards at the Hyatt Regency Century Plaza on November 8, 2014 in Century City, California. (Photo by Vincent Sandoval/Getty Images)
LOS ANGELES, CA - FEBRUARY 27: Actress Florence Henderson attends Vanity Fair and Chrysler Toast American Hustle during Vanity Fair Campaign Hollywood at Ago on February 27, 2014 in Los Angeles, California. (Photo by Michael Buckner/Getty Images for Vanity Fair)
LOS ANGELES - FEBRUARY 13: 'The Brady Bunch' cast reunites to celebrate Florence Henderson's 80th birthday on THE TALK, Thursday, February, 13, 2014 on the CBS Television Network. From left, Florence Henderson, Sharon Osbourne, and Aisha Tyler, shown. (Photo by Lisette M. Azar/CBS via Getty Images)
HART TO HART - 'Hartland Express' - Airdate: November 3, 1981. (Photo by ABC Photo Archives/ABC via Getty Images)
LEIGH MCCLOSKEY;FLORENCE HENDERSON
UNITED STATES - DECEMBER 10: THE LOVE BOAT - 'Lonely at the Top'/'Divorce Me, Please'/'Silent Night' - Season One - 12/10/77, Florence Henderson guest stars as unhappy wife who secretly longs for her husband to ask for a divorce. , (Photo by ABC Photo Archives/ABC via Getty Images)
UNITED STATES - JANUARY 23: THE BRADY BUNCH VARIETY HOUR - 1/23-5/25/77, Christopher Knight, Susan Olsen, Mike Lookinland, Florence Henderson, Robert Reed, Geri Reischl, Barry Williams, Maureen McCormick, (Photo by ABC Photo Archives/ABC via Getty Images)
UNITED STATES - JANUARY 23: THE BRADY BUNCH VARIETY HOUR - 1/23-5/25/77, Florence Henderson, Robert Reed, (Photo by ABC Photo Archives/ABC via Getty Images)
Comedian Bobcat Goldthwait and actress Florence Henderson, posing in carnival cut-outs. (Photo by Time Life Pictures/DMI/The LIFE Picture Collection/Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 584 -- Pictured: (l-r) Former boxer George Foreman, Actress Florence Henderson, host Jay Leno onstage December 1, 1994 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)
Florence Henderson during Indianapolis 500 Festival Parade Â May 26, 2007 at Downtown Indianapolis in Indianapolis, Indiana, United States. (Photo by Joey Foley/FilmMagic)
Florence Henderson during 5th Annual TV Land Awards - Arrivals at Barker Hanger in Santa Monica, CA, United States. (Photo by Barry King/WireImage)
THE VIEW - (10.21.10) Singer, Elton John and Florence Henderson ('Dancing with the Stars') appeared on today's episode of 'The View.' 'The View' airs Monday-Friday (11:00 a.m. - 12:00 noon, ET) on the ABC Television Network. (Photo by Donna Svennevik/ABC via Getty Images) ELTON JOHN, FLORENCE HENDERSON
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Henderson, who died on Nov. 24, surrounded by her four children, recorded a video earlier this year 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 opened up about her own ongoing battle with heart health.
"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."