What is the best definition of myocardial infarction?

Myocardial infarction: A heart attack. Abbreviated MI. The term “myocardial infarction” focuses on the myocardium (the heart muscle) and the changes that occur in it due to the sudden deprivation of circulating blood. The main change is necrosis (death) of myocardial tissue.

What is myocardial infarction medical terminology?

A heart attack or acute myocardial infarction (MI) occurs when one of the arteries that supplies the heart muscle becomes blocked. Blockage may be caused by spasm of the artery or by atherosclerosis with acute clot formation.

How is a myocardial infarction classified?

When there is evidence of an MI, it may be classified as an ST elevation myocardial infarction (STEMI) or Non-ST elevation myocardial infarction (NSTEMI) based on the results of an ECG. The phrase “heart attack” is often used non-specifically to refer to myocardial infarction.

What does the term myocardial infarction mean quizlet?

Myocardial Infarction definition: The development of ischemia with resultant necrosis of the myocardium caused from prolonged obstruction of the coronary arteries depriving the heart muscle of oxygen.

What does the term infarction mean?

: injury or death of tissue (as of the heart or lungs) resulting from inadequate blood supply especially as a result of obstruction of the local circulation by a thrombus or embolus : the process of forming an infarct In myocardial infarction a coronary artery becomes obstructed and this leads to irreversible damage …

What happens during a myocardial infarction?

If a blood clot totally blocks the artery, the heart muscle becomes “starved” for oxygen. Within a short time, death of heart muscle cells occurs, causing permanent damage. This is called a myocardial infarction (MI), or heart attack.

What is the main cause of a myocardial infarction quizlet?

Causes of myocardial ischemia Myocardial ischemia occurs when blood flow to the heart muscle (myocardium) is obstructed by a partial or complete blockage of a coronary artery by a buildup of plaques (atherosclerosis). If the plaques rupture, you can have a heart attack (myocardial infarction).

Which is the fourth universal definition of myocardial infarction?

Fourth Universal Definition of Myocardial Infarction. Imaging evidence of new loss of viable myocardium, or new regional wall motion abnormality in a pattern consistent with an ischemic etiology. Cardiac procedural myocardial injury is arbitrarily defined by increases of cTn values (>99th percentile URL)…

What is the pathology of myocardial infarction?

Myocardial infarction is defined by pathology as myocardial cell death due to prolonged ischemia. Cell death is categorized pathologically as coagulation and/or contraction band necrosis, which usually evolves through oncosis, but can result to a lesser degree from apoptosis.

Which is the fourth universal definition of mi?

The current (fourth) Universal Definition of MI Expert Consensus Document updates the definition of MI to accommodate the increased use of high-sensitivity cardiac troponin (hs-cTn). Detection of an elevated cTn value above the 99th percentile upper reference limit (URL) is defined as myocardial injury.

What are the seven points of view of myocardial infarction?

The scientific and societal implications of an altered definition for myocardial infarction were examined from seven points of view: pathological, biochemical, electro-cardiographic, imaging, clinical trials, epidemiological, and public policy.