Clinton, who is 63, had quadruple bypass surgery at the same hospital in 2004 after angiography revealed significant blockages in four coronary arteries.
Six months later, Clinton had surgery to remove fluid and scar tissue from his left chest cavity.
"It's not all that unusual six years out from bypass surgery to require such a procedure," said Dr. Jon Resar, director of the Adult Cardiac Catheterization Laboratory at Johns Hopkins Hospital in Maryland.
Stent surgery is a "minimal" and fairly routine procedure that is done when the patient is awake under "twilight" sedation, said Resar, an interventional cardiologist. Clinton was most likely "relaxed and conversing with the [medical] team members."
Dr. Mark Apfelbaum and Dr. Michael Collins did the stent procedure on Clinton.
"This will hopefully permanently deal with the blockage," Resar told ABCNews.com.
"Across the board, there is an 80 to 90 percent chance this deals with the problem permanently," he said.
Clinton, known for his rigorous schedule -- "20 hours a day for 20 years," according to sources close to the former president -- just returned from a day trip to Haiti as part of his work as a United Nations special envoy to the earthquake-ravaged country.
"As we know, Clinton changed his diet and was on cholesterol-lowering medication," said Resar. "But stress does play a role. But blockages in these bypass grafts can occur despite the fact that someone makes dramatic changes in their lifestyle and does all the right things."
Though Clinton has been under increased stress in Haiti, it may have "brought it to the surface, but didn't precipitate" the event, he said.
|Your name: *|
|Your email: *|
|Recepient's email: *|
|Enter code: *|