This may result in spasms of chest pain known as angina pectoris.
Infarction refers to when the heart muscle actually dies.
A transmural infarction involves the entire wall thickness. A subendocardial infarction does not penetrate the entire wall thickness. Therefore, wall motion abnormalities are more difficult to detect because adjacent wall moves normally. Normally the contraction of the heart has a wringing motion, due to the arrangement of cardiac muscle fibers. For global evaluation, 2-D each is a useful tool.