I suppose that would make it imperative you eat well and exercise Oliver? My son has a heart condition too (bicuspid aortic valve) we found out when he was 15.
It is choice what you put in your body and how much you move,but it's a shame that foods we think are healthy are misleading with regard to sugar content and packaging.
Advertising and portion sizes are important factors we are constantly bombarded with images and offers of huge portions of very fatty, salty or sweet foods.
You have to have a will of iron to resist, it's not easy
That is the only way to ensure your heart stays healthy, as was advised years ago everything in moderation... Was scoffed at in the 80s when all the faddy diets and 'diet' foods were beginning to be pushed. Fat was considered the enemy now it's known to be sugar that is the cause of heart issues as well as diabetes, NAFLD ( which I have) and obesity.