These heart (literal) "Attacks" seems to be one of ChJewcho's favorite tools.
I really understand what you mean Trapper, so I will not preach to much advice or supplements.
However dirt cheap things like a combo of Vitamin K2 (5mg), Ginkgo Biloba, Arjuna and Hawthorne extract. Also the enzymes mentioned. One often forget that it is the small subtle things you eat/do every day that makes a long term systemic effect in the body/circulation system. Would stock the % odds in your favor by a bunch.
A real hidden gem tool would be get some preservative free Heparin, 5000 units injections (USP sodium) buy them cheap at pharmacy and shoot it with a little syringe in the stomach (like insulin) or in the bum flesh. That stuff get Lyme and Malaria/Babesia patients blood from syrup to red cherry fluid in very short time. Its miracle for some.
And of course, nothing compares to your evident real shield (proven fact by now) Prayer, Jesus Christ and his Angels.