Hello @cwalgamotte
In my family tree from my father's side all men have passed away due to Cardiac blockages.
ages varying 60 to 95, to me it seems family has been genetically predisposed to Cardiac issues
I have had BP & High cholesterol from an early age below around 10 yrs, ( I still engaged in sports in youth in spite of BP Meds) so far so good .. in am in 70s, of course I do watch my diet and walk around 5 miles, also had a kidney transplant completing 4 years this month.
As long as we identify the issues & pursue a balanced approach.
Best

Look up Dr. Caldwell Esselstyn and Dr. Dean Ornish on YouTube or their books.
Do it for diet for yourself and her (you will feel great and help her) along with the medicines your/her doctors recommend (don’t skip doctor recommendations or medicines if prescribed).

I am 52 almost 53 and just found out that I have a high Lp(a) reading as well. Looking up the Pauling Protocol. I have been taking 2000 mg Vitamin C for decades now. It also helps with gum disease. Have her eat walnuts (or almonds, pistachios, cashews, macadamia nuts, etc.) 2 to 3 times a week, get plenty of sunshine for Vitamin D, start Vitamin C and eat more vegetables. Ditch sodas! Drink only unsweetened tea with sweet-n-low, coffee, or water. Avoid fruit juices where fiber has been removed. Control the things you can. Get the LDL down. There are studies that indicate that a lower LDL will reduce the teeth in a high Lp(a). Look into lipid aphoresis to buy time if needed.