Note the word cardiovascular. Very few infants and children have coronary artery problems.
Coronary artery fistula?
Sorry, the doctor is either wrong or he was badly misquoted. Even one case would prove false his, "We are all" statement and there are a lot more then one. Personally I tend to doubt the professionalism of any doctor who issues such a blanket statement. There are pretty much always exceptions to the rule. Are most people born with perfect cardiovascular health? Sure. But not all.