One day after undergoing open-heart surgery to replace a hardened aortic valve, former first lady Barbara Bush is making "remarkably good progress," according to her doctor.
"She's really made an excellent recovery," said Dr. Gerald Lawrie, the surgeon who performed the operation.
The aorta, the body's largest artery, is the main path that the heart uses to pump blood to the body. The hardening of the valve is typical of normal wear and tear on the heart of someone Bush's age.
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