Answer:
Autoantibodies are also proteins built by the body, but instead of attacking foreign material, they inappropriately attack the body's own cells. Antimyocardial antibodies attack a person's heart muscle, or myocardium.
First answer by Gale Ency. of Medicine. Last edit by Gale Ency. of Medicine. Contributor trust: 36 [recommend contributor recommended]. Question popularity: 2 [recommend question].