If you get chance to meet a cardiologist / cardiovascular surgeon, what questions will you ask about the problems related to heart ?

Explanation

I will ask following questions to clearify my doubts about problems related to heart.
i) Why heart is very vital organ ?
ii) If we do strenous exerise, will it tired quickly ?
iii) Why do we get heart attack ?
iv) What are causes for heart attack ?
v) What precautions shall we take, to prevent heart attack ?
vi) What is stunt?
vii) When do a person need stunt ?
viii) What is by - pass surgery ?
ix) What is pace maker ?
x) What type of food habits prebent heart related problems ?
xi) Why heart beat always not stable ?