Former President Bill Clinton, who had a quadruple coronary bypass on September 6, will undergo more surgery in New York on Thursday.

Clinton, 58, is scheduled to undergo a procedure to remove fluid and scar tissue from his chest at New York-Presbyterian Hospital/ Columbia University Medical Center. While a statement from the Clinton Foundation said the procedure is not unusual following open-heart surgery (see [article id="1490755"]"Former President Bill Clinton To Undergo Heart Surgery"[/article]), the former president is expected to remain hospitalized for three to 10 days.

The statement continued, "The scar tissue developed as a result of fluid and inflammation causing compression and collapse of the lower lobe of the left lung. The fluid buildup and lung collapse has caused the president some discomfort in recent weeks, but he has otherwise been in very good condition, recently passed a stress test and is walking up to four miles a day near his home in Chappaqua, New York."

Since his surgery, Clinton has been busy with the opening of his presidential library in Little Rock, Arkansas, supporting John Kerry's presidential run, and, more recently, traveling overseas with former President George H.W. Bush to raise money and awareness for tsunami relief. In a press conference Tuesday (March 8), doctors said that Clinton's ailment was not related to activity.

Clinton is expected to maintain his normal schedule and keep his appointment for an appearance at the White House Tuesday.