What is inferior posterior MI?

What is inferior posterior MI?

Posterior wall myocardial infarction occurs when circulation becomes disrupted to the posterior heart. It commonly cooccurs with inferior or inferolateral MI, but when in isolation, posterior myocardial infarction represents a diagnostic challenge.

Is inferior and posterior MI the same?

Isolated posterior MI is less common (3-11% of infarcts). Posterior extension of an inferior or lateral infarct implies a much larger area of myocardial damage, with an increased risk of left ventricular dysfunction and death. Isolated posterior infarction is an indication for emergent coronary reperfusion.

How can you tell the difference between anterior and posterior MI?

The ECG findings of an acute posterior wall MI include the following: ST segment depression (not elevation) in the septal and anterior precordial leads (V1-V4). This occurs because these ECG leads will see the MI backwards; the leads are placed anteriorly, but the myocardial injury is posterior.

Which artery is affected in posterior MI?

They usually result from occlusion of the left circumflex coronary artery but the anatomy can vary a little. Occlusion of the right coronary artery may be the cause.

How do you identify inferior MI?

The ECG findings of an inferior ST segment elevation myocardial infarction include:

  1. ST segment elevation in the inferior leads (II, III, and aVF) of at least 1 mm.
  2. Reciprocal ST segment depression in the lateral and/or high lateral leads (I, aVL, V5 and V6).

Which artery is blocked in inferior wall MI?

Inferior wall myocardial infarction (MI) occurs from a coronary artery occlusion with resultant decreased perfusion to that region of the myocardium. Unless there is timely treatment, this results in myocardial ischemia followed by infarction.

Which artery is blocked in anterior MI?

In an anterior-wall MI, the left anterior descending artery, which supplies blood to the large muscular anterior wall of the left ventricle and the anterior two-thirds of the intraventricular septum, becomes occluded.

What causes anterior MI?

An anterior myocardial infarction results from occlusion of the left anterior descending coronary artery. This can cause an ST elevation myocardial infarction or a non-ST segment elevation myocardial infarction.