DeBakey died Friday night at The Methodist Hospital in Houston from "natural causes," according to a statement issued early Saturday by Baylor College of Medicine and The Methodist Hospital.
DeBakey counted world leaders among his patients and helped turn Baylor from a provincial school into one of the nation's great medical institutions.
"Dr. DeBakey's reputation brought many people into this institution, and he treated them all: heads of state, entertainers, businessmen and presidents, as well as people with no titles and no means," said Ron Girotto, president of The Methodist Hospital System.
Girotto said the surgeon "has improved the human condition and touched the lives of generations to come."
While still in medical school in 1932, he invented the roller pump, which became the major component of the heart-lung machine, beginning the era of open-heart surgery. The machine takes over the function of the heart and lungs during surgery.
It was only a start of a lifetime of innovation. The surgical procedures that DeBakey developed once were the wonders of the medical world. Today, they are commonplace procedures in most hospitals.
He also was a pioneer in the effort to develop artificial hearts and heart pumps to assist patients waiting for transplants, and helped create more than 70 surgical instruments.
In early 2006, DeBakey underwent surgery for a damaged aorta - a procedure he had developed.
In a rare interview published later that year, DeBakey gave The New York Times details of the operation, performed when he was 97.
"It is a miracle," DeBakey said. "I really should not be here." He said he at first gambled that his aorta would heal on its own and refused to be admitted to a hospital, and was unresponsive and near death when his doctors and his wife decided to proceed, despite his age. He then spent several months in the hospital.
As he recovered, DeBakey told his doctors he was glad they had operated, despite his earlier refusals.
"If they hadn't done it, I'd be dead," he said.
Dr. William T. Butler, a colleague of DeBakey's at Baylor, said in March 2006 that DeBakey established himself with his surgical firsts as the "maestro of cardiovascular surgery."
"Dr. DeBakey was never afraid to challenge the status quo, often going against the tide," Butler said. "Some times his colleagues did not really accept his visionary ideas, particularly as he propelled beyond the boundaries of existing scientific dogma."
But the accolades poured in Saturday as news of the death spread. Baylor College of Medicine President Dr. Peter G. Traber recorded a taped webcast for the college community saying DeBakey "created the foundations of modern surgical practice," and always looked for new ways to treat patients ravaged by heart disease.
Cardiovascular surgeon Dr. George Noon called his longtime partner "the greatest surgeon of the 20th century" who "single-handedly raised the standard of medical care, teaching and research around the world."
In a 1985 Associated Press interview, DeBakey said, "I'm accused of being a perfectionist and, in the way it's usually defined, I guess I am. In medicine, and certainly in surgery, you have to be as perfect as possible. There's no room for mistakes."
DeBakey was the first to perform replacement of arterial aneurysms and obstructive lesions in the mid-1950s. He later developed bypass pumps and connections to replace excised segments of diseased arteries.
A tireless worker and a stern taskmaster, DeBakey literally had scores of patients under his care at any one time, helping to establish his name as a leading cardiovascular surgeon. He performed more than 60,000 heart surgeries during his 70 year career, The Methodist Hospital said.
"Man was born to work hard," he said.
His patients ranged from penniless peasants from the Third World to such famous figures as the Duke of Windsor, the Shah of Iran, King Hussein of Jordan, Turkish President Turgut Ozal, Nicaraguan Leader Violetta Chamorro and Presidents Kennedy, Johnson and Nixon.
But he said celebrities don't get special treatment on the operating table: "Once you incise the skin, you find that they are all very similar."
He made headlines again in 1996 when he flew to Moscow to help examine ailing Russian President Boris Yeltsin and served as a consultant when he underwent surgery.
DeBakey served as chairman of the President's Commission on Heart Disease, Cancer and Stroke during Johnson's administration and helped establish the National Library of Medicine. He was author of more than 1,000 medical reports, papers, chapters and books on surgery, medicine and related topics.