In lay terms, these are heart attacks. Myocardial refers to the heart, infarction refers to cell death resulting from inadequate blood and oxygen flow.
A heart attack. Also called an AMI. An acute myocardial infarction. Or sudden onset. It means that the heart is deprived of oxygen, because of lessenned or lack of bloodflow to the heart.
Anatomy is the study of functional areas or parts of the body whereas physiology is the study of biological and chemical processes that go on in your body.