Some Causes of Acute Myocardial Infarction (AMI) That You Need to Know

Acute myocardial infarction (AMI) is a myocardial tissue damage due to severe ischemia that occurs suddenly. Three criteria for AMI diagnosis is the presence of typical chest pain infarction, ST-segment elevation on ECG, and the increase in the enzyme creatine kinase (CK), and creatine kinase myocardial band (CKMB).

In Acute Myocardial Infarction can put forward a number of causes that can lead to the situation among others :

Coronary artery atherosclerosis.
Coronary artery spasm.
Aortic stenosis / aortic inufisiensi.

A heart attack usually occurs when a blockage in the coronary arteries resulting in limited or interruption of blood flow to a part of the heart. If the interruption or reduction of blood flow lasted more than a few minutes, the heart tissue will die.

Heart's pumping ability after a heart attack is directly related to the extent and location of tissue damage (infarct). If more than half of the damaged heart tissue, usually the heart can not function and the possibility of death. Even if the damage is not extensive, the heart can not pump properly, resulting in heart failure or shock.

Damaged heart may enlarge, and partly an attempt pumping ability of the heart to compensate for the decline (due to the larger heart will beat more powerful).

Enlarged heart is also a picture of his own heart muscle damage. Enlargement of the heart after a heart attack gives a worse prognosis.

Another cause of a heart attack are :

A clot from the heart itself. Sometimes a clot (embolus) formed in the heart, then broke and stuck in the coronary arteries.
Coronary artery spasm that causes cessation of blood flow. Seizures can be caused by drugs (such as cocaine) or due to smoking, but sometimes the cause is unknown.