If you had heart surgery when you were born can you grow up to have heart problems?

Ihave a really high metabolism and only weigh 70 pounds (13 almost 14). people always ask me two questions: do you ever eat and how do you eat so much and stay so skinny. i am worried that a high metabolism wont me forever. what are some safe steps i can take to maintain being fit. (also, i already work out i am a dancer so i get cardio a lot)

Which of the following is not a fitness benefit of cycling a: very effective at burning fat b: provides an upper body workout c: provides an aerobic workout d: good exercise for out of shape people

Which respiratory measurement as useful in differentiating between obstructive and restrictive pulmonary dysfunction