Hillary Clinton Recovering After Fainting, Suffering A Concussion

FILE - In this Oct. 2, 2012 file photo, Secretary of State Hillary Rodham Clinton speaks at the State Department in Washington. Clinton headed to Peru Monday, where she will talk about women's empowerment. But overshadowing her trip is the lingering political drama in Washington over the Obama administration�s handling of last month's deadly attack on the U.S. consulate in Libya. (AP Photo/ Evan Vucci, File)

Secretary of State Hillary Clinton fainted days ago and suffered a concussion after becoming dehydrated because of a stomach virus, the State Department said Saturday.

"She has been recovering at home and will continue to be monitored regularly by her doctors. At their recommendation, she will continue to work from home next week, staying in regular contact with Department and other officials," the State Department said in a statement.

State Department officials said Clinton, 65, fainted earlier this week, although they would not specify when the incident occurred.

NBC’s chief medical editor Dr. Nancy Snyderman said Clinton’s exhausting schedule could have made her susceptible to fainting. Clinton is known for her grueling travel schedule and has earned the distinction of being the secretary of state who has traveled the most.

“If a patient has been logging millions of miles a year and is tired and not eating or drinking the right things in a couple of days, a shift in blood volume can cause fainting,” Snyderman said.

This isn’t the first time Clinton passed out after having a stomach bug. As a U.S. senator representing New York, Clinton fainted in 2005 during a speech in Buffalo after complaining of a stomach virus.

A history of fainting could indicate underlying heart problems, Snyderman said, specifically “that the heart is not pumping correctly.”

“Heart valve or thyroid issues can be more common in older women,” Snyderman explained. “The standard protocol would be to have a cardiac workout to make sure her heart rhythm and heart valves are normal. You worry about the heart not beating correctly. That’s a very simple thing to check.”

She said that given Clinton’s past fainting episode, her doctors would likely put her through a cardiac stress test.

The concussion will have doctors “watching her like a hawk,” Snyderman said, particularly if Clinton hit the side of her head. If Clinton hit the back of her head, her brain would be better protected, she said.

Clinton canceled a trip to Morocco earlier in the week because she wasn't feeling well, according to New York Magazine. She was scheduled to be in Morocco to officially recognize the Syrian rebels who have been engaged for nearly two years in an armed battle against Syrian President Bashar al-Assad’s regime.