Republican Andy Barr and his wife, Carol, present themselves to supporters Tuesday, Nov. 6, 2012 at the Marriott Griffin Gate in Lexington, Ky., to claim Kentucky's 6th Congressional District win from the incumbent, U.S. Rep. Ben Chandler, a Democrat. (AP Photo/Brian Bohannon)
CNN  — 

Carol Barr, wife of US Rep. Andy Barr of Kentucky, died suddenly in their Lexington home Tuesday night, according to the congressman’s office.

“Congressman Andy Barr’s wife Carol passed away suddenly tonight at the family home in Lexington. During this tragic time, we respectfully ask for privacy for Congressman Barr and his family to grieve Mrs. Barr being called home to heaven,” Mary Rosado, Barr’s chief of staff, wrote in a statement.

Carol Barr was 39 and is survived by two daughters – Eleanor and Mary Clay.

According to a press release from Fayette County Coroner Gary W. Ginn, the 39-year-old’s cause of death, determined from preliminary autopsy findings, was Mitral Valve Prolapse (Floppy Valve Syndrome). The manner of death was natural, according to the release.

The heart has four valves to make sure blood is pumped in the right direction. One of those valves, the mitral valve, can become damaged so that it can’t direct the flow of blood properly. Sometimes people are born with this condition, other times it results from heart disease or infections. If the prolapse becomes very severe, the heart can no longer pump blood properly, leading to death.

Senate Majority Leader Mitch McConnell remembered Carol Barr Tuesday night, tweeting “her warmth filled whatever room she entered.”

“Her contributions made Kentucky a better place for all of us,” the Kentucky Republican wrote. “We send our sincere condolences to Andy, their girls, and their family at this terribly painful time.”

Kentucky Gov. Andy Beshear tweeted he and his wife are “heartbroken” for Barr’s family.

“Britainy and I are heartbroken for U.S. Rep. Andy Barr and his family tonight at the sad news of the unexpected passing of the congressman’s wife, Carol. We are praying for the Barr family. ^ AB”

Carol Barr earned a bachelor’s degree from University of Kentucky and was a member of the College of Communication & Information National Advisory Board, according to the schools website. She was previously an executive director of the Henry Clay Center for Statesmanship beginning in 2009, according to the center.

This story has been updated with the preliminary autopsy findings.

CNN’s Haley Byrd, Rebekah Riess and Melissa Alonso contributed to this report.