They might be shy or maybe they think that if they report it they'll loose a "friend"
He needs to share the last 3. Family history is important.
Answer: Anger issues/anger management
Explanation:
The heart itself needs blood and nutrients to work properly and gets its share of blood supply from coronary arteries. Coronary heart diseases are linked to coronary arteries. The diseases of coronary arteries are very dangerous; coronary artery diseases like atherosclerosis may cause heart attack.