AN ancient Egyptian princess might have been able to postpone her mummification if she had cut the calories and exercised more, medical experts say. Known as Ahmose Meryet Amon, the princess lived some 3,500 years ago and died in her 40s. She was entombed at the Deir el-Bahri royal mortuary temple on the west bank of the Nile, opposite to the city of Luxor. (Take an ancient-Egypt quiz.) The princesss mummified body is among those now housed at the Egyptian Museum in Cairo. Recent scans of 52 of the museums mummies revealed almost half of the dead have clogged arteriesincluding the princess. In fact, she is now the earliest known sufferer of coronary atherosclerosis, a condition caused by a buildup of arterial plaque, which can lead to heart attack or stroke. NGN (Related: King Tut Mysteries Solved: Was Disabled, Malarial, and Inbred.) Ahmose Meryet AmonChild of the Moon, Beloved of Amunhad blockages in five major arteries, including those that supply blood to the brain and heart, said study co-leader Gregory Thomas, a professor of cardiology at the University of California, Irvine. If the princess was in a time machine and I was to see her now, I would tell her to lay off the fat, take plenty of exercise, then schedule her for heart surgery, Thomas said. She would require a double bypass. NGN