What is Subendocardial infarct?

Subendocardial infarction was defined as typical chest apin (greater than 15 minutes), serum enzyme elevation and persistent (greater than 48 hours) new T wave inversion and/or S-T segment depression in the absence of new pathologic Q waves.

Where does subendocardial infarction occur?

A subendocardial infarct results in necrosis exclusively inolving the innermost aspect of the myocardium. Usually a subendocardial infarct is the result of a partially occluded epicardial coronary artery (i.e. NSTEMI).

What is the initial treatment for myocardial infarction?

Although the immediate priority in managing acute myocardial infarction is thrombolysis and reperfusion of the myocardium, a variety of other drug therapies such as heparin, β-adrenoceptor blockers, magnesium and insulin might also be considered in the early hours.

What causes a subendocardial infarction?

Regional infarcts are due to lack of blood flow that occurs when an epicardial artery is blocked by atheroma or thrombus, or other obstructions. Global subendocardial infarcts occur when there is lack of oxygenation despite circulation—for example, when there is a respiratory arrest followed by prolonged hypoxemia.

What is the difference between a transmural and subendocardial infarction?

The results of this study are that subendocardial infarction is associated with a significant reduction in longitudinal S and SR, whereas radial and circumferential function are relatively preserved. In contrast, transmural infarction is associated with a reduction of both long-axis and short-axis function.

Is inferior infarct serious?

Inferior myocardial infarctions have multiple potential complications and can be fatal. See the review on ST elevation myocardial infarction for more detail on complications of an inferior myocardial infarction and a detailed discussion on treatment.

What is the best treatment for myocardial infarction?

All patients with a suspected myocardial infarction should be given aspirin. It is a powerful antiplatelet drug, with a rapid effect, which reduces mortality by 20%. Aspirin, 150-300 mg, should be swallowed as early as possible.

What are the stages of myocardial infarction?

The myocardial infarction process can be divided into 2 phases, an early evolving phase (the first 6 hours) and a later convalescent phase. An evolving infarction is associated with an occluded coronary artery; in most cases, a thrombotic occlusion occurs.

Is infarction irreversible?

Myocardial infarction (MI) (ie, heart attack) is the irreversible death (necrosis) of heart muscle secondary to prolonged lack of oxygen supply (ischemia).

What is the difference between an infarct and infarction?

86 What is the difference between an infarct and infarction? An infarct is an area of ischemic necrosis. Infarction is the process that leads to this ischemic necrosis.