A memorial service was scheduled at West Point Friday for the 28-year-old Southern Californian.
Dixon was taken to Westchester (N.Y.) Medical Center after suffering an "arrhythmic episode to her heart" Wednesday at the U.S. Military Academy, her older brother, Pittsburgh men's Coach Jamie Dixon, told the Los Angeles Times.
"She went to the house of a friend for afternoon tea, where she said she wasn't feeling good and she collapsed," Dixon said in a statement.
Dixon had no history of heart problems, a friend of the family said. She had attended the Final Four in Indianapolis with her brother with no apparent sign of health irregularities.