Not disagreeing, but want to add that heart attacks are usually a result of an inflammatory process within coronary artery walls (as opposed to plaque building up on the outside of the wall). Inflammation in the artery wall leads to plaque buildup (to repair it). If that plaque breaks through the artery wall (the intima) into the bloodstream, a clot forms leading to a heart attack.

https://www.youtube.com/watch?v=cwri-0rTweI https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3209544/