there are many things that you may be trying, but here is another cheap and easy therapy.
i am trying it out myself. good luck
Vitamin C is required to strengthen arteries so that the body does not try to patch arteries with "plaster casts" (atherosclerosis).
Lysine is an Lp(a) binding inhibitor, meaning at sufficient dosage it can reverse the plaster cast build-up (atherosclerotic plaques.) Lp(a) is the sticky form of LDL cholesterol that Pauling/Rath identified as the primary risk factor.