"We are so lucky she is alive. The doctors said that if we had waited another half-hour to bring her to the ER things would have turned out drastically different," said Mike Karpowecz of Eureka, who tends to his five-year daughter Ava, at Cardinal Glennon Hospital Wednesday morning. Ava slipped on the ice Saturday morning and hit her head. Although there were no signs of an injury, a life-threatening blood clot formed. This is the same type of injury actress Natasha Richardson died from a skiing accident last year. According to her doctor, Ava will make a full recovery.