First of all, I would like to recommend Dr. Christophers Hawthorne Berry Syrup. It is wonderful for the heart and entire cardiovascular system and often relieves chest pains.
I am a bit skeptical about you having a problem with arterial plaque, given your age and your description of dietary habits and evidently exercise. Hopefully you aren't taking any steriodal type supplements to go along with that exercise. If you want to look at things one can do naturally to avoid and reduce arterial plaque, see:
Whether or not you have a problem with arterial plaque, it's always a good idea to avoid arterial plaque.