There may be a genetic component to getting this problem, but medical people like to attribute a problem to genetics because then the solution looks far, far away and they will "do everything they can, but how do you fight genetics, right?" There are many other causes of this problem, such as a virus. The best solution is to work on making your heart healthy.
Taking a statin drug is the dumbest thing you can do because statin drugs invariably turn on the Antigen-1 gene that causes muscle atrophy. Since your heart is a muscle, that is not a good thing to do. The next thing is that statin drugs reduce your production of CO-Q-quinol in your liver by 50% in the first 30 days of taking that garbage. Your heart, like all the cells in your body need that CO-Q-quinol for good health. Additionally, many liver cancers are being blamed on statin drugs now.
You always have a chance of getting it, but if you focus on making yourself healthy, your chances greatly diminish. Like any disease humans get, there always seems to be a cascade of events that lead up to getting that disease. Most diseases and illnesses can be traced back to nutritional deficiencies, toxins, or bad medical procedures (iatrogenic problems).
There is a phrase in the Hippocratic oath doctors take when they get their license that states "avoiding those twin traps of over treatment and therapeutic nihilism" is of particular interest when you realize that the meaning of therapeutic nihilism is a contention that curing people, or societies, of their ills by treatment is impossible. In medicine, it was connected to the idea that many "cures" do more harm than good, and that one should instead encourage the body to heal itself.
Another particularly interesting phrase in the doctor's oath is "I will prevent disease whenever I can, for prevention is preferable to cure."
So the real key for you is to focus on prevention rather than worrying about getting the problem. For your mom, she should be focused on becoming healthy by improving her nutrition and lifestyle, while avoiding the toxins and bad foods.
good luck to you