MICROANATOMY

Detailed explanation-1: -Heart Attack (Myocardial Infarction) A heart attack (medically known as a myocardial infarction) is a deadly medical emergency where your heart muscle begins to die because it isn’t getting enough blood flow. A blockage in the arteries that supply blood to your heart usually causes this.

Detailed explanation-2: -An acute complete blockage of a medium or large heart artery usually means you’ve had an ST elevation myocardial infarction (STEMI). A partial blockage often means you’ve had a non-ST elevation myocardial infarction (NSTEMI). However, some people with NSTEMI have a total blockage.

Detailed explanation-3: -A heart attack is also called a myocardial infarction (MI) or an acute myocardial infarction (AMI). Many heart attacks are caused by a complete blockage of a vessel in your heart, called a coronary artery. A blocked coronary artery prevents oxygen-rich blood and nutrients from reaching a section of the heart.

Detailed explanation-4: -Chronic coronary total occlusion (CTO) occurs when either the left main or right coronary artery-one of the arteries that delivers oxygen-rich blood to your heart-has become completely blocked or occluded for three months or longer. Approximately 15 to 20 percent of people with coronary artery disease have a CTO.