It may be partly genetic, but partly family dietary habits.
I shared my propensities for snacks of cheese and crackers, like my Dad, more than my siblings. And ice cream, and peanut butter.
No one else among my siblings has severe heart disease
Improve your diet, don't smoke, try to be mellow and non-stressed, get an hour of exercise almost every day.
Eats a lot more fruits and veggies. low amount of meats, no visible animal fat or skin.